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    • 专利摘要:
    WATER INK COMPOSITION, METHOD FOR FORMING A PRINTED SUBSTRATE AND METHOD FOR PREPARING A WATER INK COMPOSITION An aqueous ink composition includes at least 60% water by weight, an acrylic latex polymer suspension, a polyurethane suspension, a suspension of polyethylene wax, and an organic solvent comprising about 10% to about 30% of the paint composition. In methods for preparing an aqueous paint composition, a combination of the above-mentioned components is provided. The combination is subjected to conditions under which the paint composition becomes substantially uniform and then the combination is subjected to filtration.
    公开号:BR112013021749B1
    申请号:R112013021749-9
    申请日:2011-03-30
    公开日:2020-11-17
    发明作者:Or Brandstein；Eytan Cohen；Ran Vilk
    申请人:Hewlett-Packard Industrial Printing Ltd；
    IPC主号:
    专利说明:

    Background of the invention
    Inkjet printers are now very common and affordable and allow you to get decent quality. They are used in home printing, office printing and commercial printing. The growth of inkjet printing is the result of several factors, including reductions in the cost of inkjet printers and improved print resolution and overall print quality. A continued demand for inkjet printing has resulted in the need to produce high quality, high performance and high durability images while maintaining a reasonable cost. Inkjet printing is a popular method of non-contact printing on a wide variety of substrates.
    A wide variety of ink types are used in inkjet printing, with each type of ink having its advantages and disadvantages. Industrial inkjet printing uses primarily UV-curable inks and solvent-based inks, typically blasted by piezoelectric inkjet (PIJ) printheads. Solvent-based inks have good adhesion and printability, as well as sandblasting safety and print speed. Solvent inks, however, emit large amounts of volatile organic compounds (VOCs) considered to be hazardous air pollutants (HAPS). For the use of solvent inks, the installation of special VOC capture devices and the imposition of strict control over the printing site are required. Solvent-based inks have a low gloss point and are easily flammable and therefore must be dried at relatively low temperatures.
    UV inkjet inks enable high printing speed, have relatively good adhesion on a variety of substrates and have low VOC content. UV inks, however, are characterized by an unpleasant odor; and in addition, said inks are harmful to the environment and can cause inflammation of the skin or eyes. The printed image, from the use of UV inks has a small gross yield and when printed on a flexible substrate, the ink limits the flexibility of the substrate and the applications related to elasticity / contraction.
    Water-based inkjet inks (water-based) are used primarily in a domestic environment or an industrial / official environment (in the office). A large number of commercial inkjet printers use aqueous latex inks, such as, for example, HP DESIGNJET® L25500, wide format inkjet printers (Hewlett Packard, Paio Alto CA), which use aqueous latex ink with technology thermal inkjet (TIJ), and HP SCITEX® FB6700, which is a platform PIJ printer that uses aqueous latex ink. Aqueous inks have several advantages such as, for example, low viscosity and ecological character (environmentally friendly) compared to UV-based inks and solvent-based inks, aqueous inks produce a good quality and wide image on the color scale.
    Drying aqueous paints requires large amounts of energy. In addition, when water evaporates, the ink dries at the printhead nozzles. Complicated system maintenance may be necessary to provide continued printhead operation. The adhesion of aqueous inks can be limited and printing on plastic substrates has been very difficult, if not impossible. Brief description of the drawings
    The drawings provided here are not to scale and are provided for the purpose of facilitating the understanding of certain examples in accordance with the principles described herein and are provided for illustrative purposes and do not limit the scope of protection of the attached claims.
    Figure 1 illustrates a graph of correlation between water vapor pressure and ink temperature for an example of an ink composition according to the principles described here. Detailed description of the invention
    Examples according to the principles described here provide aqueous inkjet ink compositions, which allow for a reliable, low VOC, fast drying and curing jet, capable of printing on plastic and non-plastic media with excellent quality image, good adhesion and durability of the film. In addition, examples of aqueous inks according to the principles described herein combine the positive properties of UV-based inks and organic solvent-based inks and circumvent many, if not all, of the disadvantages of aqueous inks discussed above.
    In some examples, according to the principles described herein, an ink composition comprises (a) at least 60% water by weight, (b) a suspension of acrylic latex polymer, (c) a suspension of polyurethane, (d ) a suspension of polyethylene wax, and (d) an organic solvent comprising about 10% to about 30% of the ink composition.
    The amount of water in the ink composition is dependent, for example, on the amount of other components of the ink composition. The amount of water in the ink composition includes the amount of water added plus the amount of water in the suspensions and other components of the ink composition. In some examples, the amount of water in the ink composition by weight is at least about 60%, or at least about 65%, or at least about 70%, or at least about 75%, and no more than that about 80%, for example. In some examples, the amount of water in the ink composition by weight is in the range of about 60% to about 80%, or about 60% to about 75%, or about 60% to about 70%, or about 60% to about 65%, or about 65% to about 80%, or about 65% to about 75%, or about 65% to about 70%, or about 70% to about 80%, or about 70% to about 75%, or about 75% to about 80%, for example.
    As mentioned above, the paint composition according to the principles described herein includes the above mentioned three types of suspensions, termed, an acrylic latex polymer suspension, a polyurethane suspension and a polyethylene wax suspension. The combination of these three polymer suspensions enables the optimal balance between the speed of forming a paint film, the durability of the paint film, the safety of the paint blasting and the adhesion of the paint composition on many different types of surfaces, including plastic substrates. Polymers mixed at different formation and film temperatures, such as acrylic latex polymer with transition temperature and glass greater than Tg than polyurethane polymer and with minimum lower film formation temperature (MFFT) improves the film formation process total for having the polyurethane polymer acting as a coalescing person in the process of forming latex film.
    In some examples, a mixture of acrylic latex polymer suspension, polyurethane suspension and polyethylene wax suspension is selected to obtain a composition and ink having a viscosity of about 5 centipoise (cp) to about 15 cp, or about 5 cp to about 12 cp, or about 5 cp to about 10 cp, or about 5 cp to about 8 cp, or about 8 cp to about 15 cp, or about 8 cp to about 12 cp, or about 8 cp to about 10 cp at a distribution temperature (that is, a temperature at which the ink composition is emitted from an ink distribution device where the distribution can be by blasting, for example) about 5 ° C to about 40 ° C, about 5 ° C to about 35 ° C, about 5 ° C to about 30 ° C, about 5 ° C to about 25 ° C , from about 5 ° C to about 20 ° C, from about 5 ° C to about 15 ° C, from about 5 ° C to about 10 ° C, from about 10 ° C to about 35 ° C, or from about 10 ° C to 5 about 30 ° C, or from about 10 ° C to about 25 ° C, or from about 10 ° C to about 20 ° C, or from about 10 ° C to about 15 ° C, or from about 15 ° C to about 40 ° C, or from about 15 ° C to about from 35 ° C, or from about 15 ° C to about 30 ° C, or from about 15 ° C to about 25 ° C, or from 10 about 15 ° C to about 20 ° C, or about 20 ° C to about 40 ° C, or about 20 ° C to about 35 ° C, or about 20 ° C to about 30 ° C, or about 20 ° C to about 25 ° C, or from about 25 ° C to about 40 ° C, or from about 25 ° C to about 35 ° C, or from about 25 ° C to 15 about 30 ° C, or about from 30 ° C to about 40 ° C, or from about 30 ° C to about 35 ° C, or from about 35 ° C to about 40 ° C, for example.
    As mentioned above, one of the components of an ink composition according to the principles described herein is a suspension of acrylic latex polymer. The term "acrylic latex" includes polymers of acrylic monomers, polymers of methacrylic monomers, and copolymers of the aforementioned monomers with other monomers. The term "suspension" includes emulsions and dispersions, for example. The suspension comprises a suspension medium and a suspended solid material which is, for example, a particle, which is relatively evenly distributed through the suspension medium and which has an average diameter of about 30 mm to about 300 mm, or 30 about 30 mm to about 250 mm, or about 30 mm to about 200 mm, or about 30 mm to about 150 mm, or about 30 mm to about 100 mm, or about 30 mm to about 70 mm, or about 50 mm to about 300 mm, or about 50 mm to about 250 mm, or about 50 mm to 35 about 200 mm, or about 50 mm to about 150 mm, or about 50 mm to about 100 mm, or about 50 mm to about 70 mm, or about 75 mm to about 300 mm, or about 75 mm to about 250 nun, or about 75 mm to about 200 mm, or about 750 mm to about 150 mm, or about 75 mm to about 100 mm to about 200 mm, or about 100 mm to about 150 mm, or about 150 mm to about 300 mm, or about 150 mm to about 250 mm, or about 150 mm around 200 mm, for example. In some examples, the suspension medium is an aqueous medium, which may comprise one or more additional components, such as, but not limited to, organic solvents (e.g., glycols, alcohols, ether glycol, and heterocyclic ketones).
    In some examples, the percentage of solids in the acrylic latex polymer suspension is about 10% to about 50%, or about 10% to about 45%, or about 10% to about 40% or about 10% to about 35% or about 10% to about 30%, or about 10% to about 25%, or about 10% to about 20%, or about 10% to about 15% , or about 20% to about 50%, or about 20% to about 45%, or about 20% to about 40%, or about 20% to about 35%, or about 20% at about 30%, or about 20% to about 25% by weight of the latex polymer suspension in the suspension is such that the percentage of acrylic latex polymer solids in the paint composition is about 1% to about 4 %, or about 1% to about 3%, or about 1% to about 2% or about 2% to about 4%, or about 2% to about 3%, or about 3% about 4%, for example.
    In some examples, the acrylic latex polymer suspension has a glass transition temperature of about 50 ° C to about 90 ° C, or about 50 ° C to about 85 ° C, or about 50 ° C to about 80 ° C, or about 50 ° C to about 75 ° C, or about 50 ° C to about 70 ° C, or about 55 ° C to about 90 ° C, or about 55 ° C to about 85 ° C, or about 55 ° C to about 80 ° C, or about 55 ° C to about 75 ° C, for example.
    The acrylic latex polymer is formed from acrylic monomers and thus can be said to comprise the residues of acrylic monomers or residues of methacrylic monomers. Examples of monomers of the acrylic latex polymer include, by way of illustration and non-limitation, acrylic monomers, such as, for example, acrylate esters, acrylamides, and acrylic acids, and methacrylate monomers, such as, for example, methacrylate esters, methacrylamides, and methacrylic acids. The acrylic latex polymer can be a homopolymer or copolymer of an acrylic monomer and another monomer, such as, for example, an aromatic vinyl monomer including, but not limited to, styrene, styrene-butadiene, p-chloromethylstyrene, divinyl benzene, vinyl naphthalene and divinyl naphthalene, for example, so that, in some examples, according to the principles described here, acrylic latex polymers are predominantly acrylic polymer. By '' predominantly acrylic 'is meant that the polymer contains more than about 50%, or more than about 55%, or more than about 60%, or more than 70%, or more than 80%, or more than 90%, by weight, of the copolymerized units comprising residues of acrylic monomers or residues of methacrylic monomers, or combinations thereof.
    Examples of acrylate monomers include, but are not limited to, methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, isobornyl acrylate, cyclohexyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, isocyanate acrylate, glycidyl acrylate, 3,4-epoxycyclohexylmethacrylate, 2- (3, 4- epoxycyclohexyl acrylate, acrylate, acrylate, acrylate of hydroxypropyl, hydroxybutyl acrylate, methacrylate anhydride, diethylene glycol bisacrylate, 4,4'-isopropylidenodiphenol bisacrylate, (Bisphenol A diacrialte), 4,4 '-isopropylidenyl trimethyl acetate and trimethylacrylate alkoxylate;
    Examples of methacrylate monomers include, but are not limited to, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl 2-methacrylate methacrylate , lauryl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, 3,3,5-trimethylcyclohexyl methacrylate, isocane methacrylate, glycidyl methacrylate, 3,4-epoxycyclohexylmethylmethacrylate, 2- (3,4-exy-hydroxy hydroxypropyl methacrylate, hydroxybutyl methacrylate, methacrylic anhydride, diethylene glycol bismethacrylate, 4,4'-isopropylidenodiphenol bismethacrylate (4,4'-isopropyl alcohol, 3-methacrylate, 3-methoxyethyl alcohol, 3-methacrylate).
    Some examples of suspensions of particular acrylic latex polymer according to the principles described here include, by way of illustration and not limitation, JONCRYL® 537 and JONCRYL® 538 (BASF Corporation, Prot Arthur TX); CARBOSET® GA-2111, CARBOSET® CR-728, CARBOSET® CR-785, CARBOSET® CR-715, and CARBOSET® GA-4028 (Lubrizol Corporation, Rancho Santa Margarita CA); NEOCRYL® A-1110, NEOCRYL® A-1131, NEOCRYL® A-291, NEOCRYL® A-1127, NEOCRYL® XK-96, and NEOCRYL® XK-14 (DSM NeoResins, Sluisweg, The Netherlands); and BAYHYDROL® AH XP 2754, BAYHYDROL® AH XP 2741, BAYHYDROL® A 2427, and BAYHYDROL® A 2651 (Bayer Material Science, Baytown TX), for example, or a combination of two or more of the above.
    In some examples, the acrylic latex polymer suspension may contain neutralizing agents that have the purpose of converting at least the acid groups in a polymer to a respective salt, which makes the suspension of the polymer particles in water stable. Examples of neutralizing agents include, but are not limited to, triethylamine (TEA), dimethyl ethanolamine (DMEA), triethanolamine, sodium salt, ammonia, ethyl diisopropyl amine (EDIPA), for example. The neutralizing agent is provided in the polymeric suspension of acrylic latex in an amount sufficient to follow the above purpose.
    As mentioned above, one of the components of an ink composition according to the principles described here is a polyurethane suspension. In some examples, according to the principles described here, the polyurethane polymer has an MFFT of about 20 ° C to about 50 ° C, or about 20 ° C to about 45 ° C, or about 20 ° C to about 40 ° C, or from about 20 ° C to about 35 ° C, or from about 20 ° C to about 30 ° C, or from about 25 ° C to about 45 ° C, or about 25 ° C to about 40 ° C, or about 25 ° C to about 35 ° C, or about 25 ° C to about 30 ° C, or about 30 ° About 50 ° C, or about 30 ° C to about 45 ° C, or about 30 ° C to about 40 ° C, or about 30 ° C to about 350 ° C.
    In some instances, the polyurethane suspension is free of organic solvents. Said organic solvents include both polar and non-polar organic solvents.
    In some examples, the polyurethane suspension is free of butyl glycol and pyrrolidones, such as, for example, N-methyl-pyrrolidone, N-ethyl-pyrrolidone.
    In some examples, according to the principles described here, the polyurethane suspension will be selected from the group consisting of aliphatic polyurethane dispersions, aromatic polyurethane dispersions, anionic polyurethane dispersions, nonionic polyurethane dispersions, polyester polyurethane dispersions aliphatic, aliphatic polycarbonate polyurethane dispersions, aliphatic acrylic modified polyurethane dispersions, aromatic polyester polyurethane dispersions, aromatic polycarbonate polyurethane dispersions, aromatic acrylic modified polyurethane dispersions, aromatic polyester polyurethane dispersions, polyurethane polyurethane dispersions aromatic, and dispersions of aromatic acrylic modified polyurethane, for example, or a combination of two or more of the above.
    In some examples, the polyurethane suspension may contain neutralizing agents that are intended to convert at least some of the acid groups in a polymer to a respective salt, which enables a stable suspension of the polymeric particles in water.
    Examples of neutralizing agents include, but are not limited to, triethylamine (TEA), dimethyl ethanolamine (DMEA), triethanolamine, sodium salt, ammonia, ethyl diisopropyl amine (EDIPA), for example. The neutralizing agent is provided in the polyurethane suspension in an amount sufficient to accompany the aforementioned purpose.
    In some examples, the percentage of solids in the polyurethane suspension is about 10% to about 50%, or about 10% to about 45%, or about 10% to about 40%, or about 10% about 35%, or about 10% to about 30%, or about 10% to about 25%, or about 10% to about 20%, or about 10% to about 15%, or about 20% to about 50%, or about 20% to about 45%, or about 20% to about 40%, or about 20% to about 35%, or about 20% to about 35%, or about 20% to about 30%, or about 20% to about 25%, by weight of the polyurethane suspension. In some examples, according to the principles described here, the percentage of polyurethane solids in the suspension is such that the percentage of polyurethane solids in the paint composition is about 2% to about 10%, or about 2% about 8%, or about 2% to about 6%, or about 2% to about 4%, or about 2% to about 3%, or about 3% to about 10%, or about 3% to about 8%, or about 3% to about 6%, or about 3% to about 4%, or about 4% to about 10%, or about 4% to about 8%, or about 4% to about 6%, or about 4% to about 5%, for example.
    Some examples of particular polyurethane suspensions, in accordance with the principles described here include, by way of illustration and without limitation, NEOREZ® R-989, NEOREZ® R-2005, and NEOREZ® R-4000 (DSM NeoResins); BAYHYDROL® UH2606, BAYHYDROL® UH XP 2719, BAYHYDROL UH XP 2648, and BAYHYDROL® UA XP 2631 (Bayer Material Science); DAOTAN® VTW 1262 / 35WA, DAOTAN® VTW 1265 / 36WA, DAOTAN® VTW 1267 / 36WA, DAOTAN® VTW 6421 / 42WA, DAOTAN® VTW 6462 / 36WA (Cytec Engineered Materials Inc., Anaheim CA); and SANCURE® 2715, SANCURE® 20041, SANCURE® 2725 (Lubrizol Corporation), for example, or a combination and two or more of the above.
    As mentioned above, one of the components of an ink composition, according to the principles described herein, is a suspension of polyethylene wax. The polyethylene wax suspension can be non-ionic, anionic or stabilized cationic. In some examples, according to the principles described here, the polyethylene wax suspension is selected from the group consisting of low density polyethylene (LDPE) wax emulsions, high density polyethylene wax (HDPE) emulsions, oxidized polyethylene wax emulsions, ethylene copolymer wax emulsions, and polyethylene copolymer wax emulsions, for example, or a combination of two or more of the above.
    Some examples of suspensions of particular polyethylene wax, according to the principles described here include, by way of illustration and not limitation, POLIGEN® WE1, POLIGEN® WE3, POLIGEN® WE4, POLIGEN® WE6, POLIGEN® WE7, and POLIGEN® WE9 , (all from BASF Corporationa); LAKEWAX® 29, LAKEWAX® 37, and LAKEWAX® 20 (All from Lakeland laboratoires Limited, Manchester, England); MIDCHEM® 93235 and MIDCHEM® Lube 190 (both available from Michelman, Cincinnati OH); and API®-188 (Advanced Polimers Inc., Salem NH); for example, or a combination or two or more of the above.
    In some examples, the percentage of solids in the polyethylene wax suspension is about 10% to about 50%, or about 10% to about 45%, or about 10% to about 40%, or from about 10% to about 35%, or from about 10% to about 30%, or from about 10% to about 25%, or from about 10% to about 20%, or about 10% to about 15%, or about 20% to about 50%, or about 20% to about 45%, or about 20% to about 40%, or about 20% to about 35%, or from about 20% to about 30%, or from about 20% to about 25%, by weight of the polyethylene wax suspension. The percentage of polyethylene wax solids in the suspension is such that the percentage of polyethylene wax solids in the paint composition is about 0.1% to about 2%, or about 0.1% to about 1 , 5% or about 0.1% to about 1%, or about 0.1% to about 0.5% or about 0.2% to about 2%, or about 0.2% about 1.5%, or about 0.2% to about 1%, or about 0.2% to about 0.5%, or about 0.5% to about 2%, or about 0.5% to about 1.5%, or about 0.5% to about 1% or about 1% to about 2%, for example.
    In some examples, according to the principles described here, the solids in the respective suspensions of the paint composition, for illustrative and non-limiting purposes, have a proportion represented as a polymeric suspension of acrylic latex: polyurethane suspension: suspension of polyethylene wax, from about 2 to about 3: about 1: about 0.3 to about 0.5, for example, with some examples being, but not limited to, about 2: about 1: about 0, 5 or about 3: about 1: about 0.3, for example.
    As mentioned above, an ink composition according to the principles described herein comprises an organic solvent. The organic solvent is soluble (water soluble) or water miscible (water miscible). The nature of the organic solvent is dependent, for example, on the evaporation quality or volatility of the organic solvent.
    Considerations for the volatility of the organic solvent include, for example, optimization of a film-forming process, the safety of blasting the ink composition comprising the organic solvent, and maintaining a low VOC content of the ink composition, for example. A simple organic solvent can be used or a combination of two or more organic solvents can be used.
    In some examples, the organic solvent is a polar organic solvent having carbon atoms and hetero atoms.
    For example, the organic solvent can have about 2 to about 50 carbon atoms, or about 2 to about 40 carbon atoms, or about 2 to about 30 carbon atoms, or about 2 to about 20 carbon atoms, or about 2 to about 10 carbon atoms, or about 5 to about 50 carbon atoms, or about 5 to about 40 carbon atoms, or about 5 to about 30 atoms of carbon, or about 5 to about 20 carbon atoms, or about 5 to about 10 carbon atoms, or about 10 to about 50 carbon atoms, or about 10 to about 40 carbon atoms , or about 10 to about 30 carbon atoms, or about 10 to about 20 carbon atoms, or about 10 to about 15 carbon atoms. In addition, the organic solvent can have 1 to about 20 hetero atoms, or about 1 to about 15 hetero atoms, or about 1 to about 10 hetero atoms, or about 1 to about 5 hetero atoms, or about 2 to about 20 heteroatoms, or about 2 to about 15 heteroatoms, or about 2 to about 10 heteroatoms, or about 2 to about 5 heteroatoms, or about 3 to about 20 heteroatoms, or about 3 to about 15 heteroatoms, or about 3 to about 10 heteroatoms, or about 3 to about 5 heteroatoms, or about 4 to about 20 heteroatoms, or about 4 to about 15 heteroatoms, or about 4 to about 10 hetero atoms, or about 4 to about 5 hetero atoms, or about 5 to about 20 hetero atoms, or about 5 to about 15 hetero atoms, or about 5 to about 10 hetero atoms, for example. The heteroatoms can be in the form of one or more alcohol moieties, ether moieties, ketone moieties, aldehyde moieties, amine moieties, and amide moieties, for example.
    In some examples, the organic solvent has a boiling point of about 170 ° C to about 250 ° C, or about 170 ° C to about 240 ° C, or from about 170 ° C to about 230 ° C, or from about 170 ° C to about 220 ° C, or from about 170 ° C to about 210 ° C, or from about 170 ° C to about 200 ° C, or about 170 ° C to about 190 ° C, or from about 170 ° C to about 180 ° C, or from about 180 ° C to about 250 ° C, or from about 180 ° C to about 240 ° C , or from about 180 ° C to about 230 ° C, or from about 180 ° C to about 220 ° C, or from about 180 ° C to about 210 ° C, or about 180 ° C at about 200 ° C, or from about 180 ° C to about 190 ° C, or from about 190 ° C to about 250 ° C, or from about 190 ° C to about 240 ° C, or from about 190 ° C to about 230 ° C, or from about 190 ° C to about 220 ° C, or from about 190 ° C to about 210 ° C, or from about 190 ° C to about from 200 ° C, or from about 200 ° C to about 250 ° C, or from about 200 ° C to about 240 ° C, or from about 200 ° C to about 230 ° C, or from about 200 ° C to about 220 ° C, or from about 200 ° C to about 210 ° C, for example.
    In some examples, the organic solvent is, by way of illustration and not limiting, in alcohol (for example, methanol, ethanol, propanol, isopropanol, butanol, isobutane, sec-butanol, t-butanol, pentanol, hexanol, cyclohexanol or benzyl alcohol ); a polyhydric alcohol (for example, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, butylene glycol, hexanediol, pentanediol, glycerol, hexanotriol, or thiodiglycol); a glycol derivative, such as, for example, an ether or an ester (for example, ethylene glycol, monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, triethylene glycol monomethyl ether, ethylene glycol diacetate, ethylene glycol monomethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether or ethylene glycol monophenyl ether); an amine (for example, ethanolamine, diethanolamine, triethanolamine, N-methyldiethanolamine, N-ethyl diethanolamine, morpholine, N-ethylmorpholine, ethylenediamine, diethylenetriamine, triethylenetetramine, polyethyleneimine or tetramethylpropylenediamine); an amide (for example, formamide, N, N-dimethylformamide, or N, N-dimethylacetamide); and other organic solvents such as, for example, dimethylsulfoxide, sulfolane, 2-pyrroljidone, N-methyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, 2-oxazolidone, 1,3-dimethyl-2-imidizolidinone, acetonitrile or acetone. The organic solvents mentioned above can be used in combination of two or more of them.
    In some examples, according to the principles described here, the organic solvent is a glycol, an ether glycol, an alcohol, or a heterocyclic ketone, or a combination of two or more of the above. An amount of the organic solvent in the paint composition is dependent on the number of factors such as, for example, optimization of a film-forming process, blasting safety of the paint composition comprising the organic solvent, and maintaining a low VOC content of the ink composition. In some examples, according to the principles described here, the amount of organic solvent in the ink composition is about 10% to about 30%, or about 10% to about 25%, or about 10% to about 25%, or about 10% to about 20%, or about 10% to about 15%, or about 15% to about 30%, or about 15% to about 25%, or about 15% to about 20%, or about 20% to about 30%, or about 20% to about 25%, or about 25% to about 30%, by weight of the paint composition, for example .
    Some examples of particular organic solvents according to the principles described here include, for illustrative and non-limiting purposes, ether glycol solvents, for example, tripropylene glycol monomethyl ether (DOWANOL® TPM), dipropylene glycol ether (DOWANOL® DPG), dipropylene glycol dimethyl ether (PROGLYDE® DMM) (all available from Dow Chemical Company, Midland MI), for example.
    An ink composition, according to the principles described, can further comprise a humectant. Humectant-related considerations include, but are not limited to, reducing or eliminating nozzle obstruction, for example. In some examples, the amount of humectant in the paint composition is that which is effective at the address of the considerations above.
    An ink composition according to the present invention can further comprise one or more other components such as, but not limited to, dyes, pigments, and additives affecting the various properties of the ink composition, for example.
    As mentioned above, ink compositions can comprise one or more pigments or dyes as dyes. In some instances, insoluble pigment dyes help achieve better imaging performance. The pigment particles can be self-dispersing pigments, pigments coated with polymers, or common pigments such as ground pigments, for example.
    A separate dispersing agent can be used to enable the appropriate suspension of the pigment in the ink composition. The particulate pigment can be inorganic or organic. In some embodiments, the ink composition pigment is a pigment coated with or encapsulated in an organic polymer. The pigment can be a naturally occurring pigment or a synthetic pigment. The pigment can be of any color, including, but not limited to, black, blue, brown, cyan, green, white, violet, magenta, red, orange and yellow, as well as colors identified from their mixtures.
    The particulate pigment can be a single particulate pigment or a mixture of two or more particulate pigments. Thus, and it can be at least one particulate pigment or at least two particulate pigments or at least three particulate pigments, for example. The number of pigments in a pigment mixture comprising the particulate pigment is in the range of 2 to about 5, or 2 to about 4, or 2 to about 3.
    Examples of organic pigments that may be present in the ink composition include, by way of illustration and non-limitation, perylene, phthalocyanine pigments (e.g., phthalo green, phthalate blue), cyanine pigments (Cy3, Cy5, and Cy7), naphthalocyanine pigments, nitrous pigments, monoazo pigments, diazo pigments, diazo condensation pigments, basic dye pigments, alkaline blue pigments, lake blue pigments, quinoxidone pigments, acid yellow 1 and 3 lake pigments, isoindolinone pigments, dioxazine pigments, violet dioxazin carbaxol pigments, alizarin lake pigments, tank pigments, phthaloxy amine pigments, carmine lake pigments, tetrachloroisoindolinone pigments, perinone pigments, thioindigo pigments, anthraquinone pigments and quinophthalone pigments, for example, and mixtures of two or more of the above and derivatives of the above.
    Inorganic pigments that may be present in the pigment dispersion include, for example, metal oxides (for example, titanium dioxide, electrically conductive titanium dioxide, iron oxide (for example, red iron oxide, yellow iron oxide, iron oxide) black iron and transparent iron oxides), aluminum oxides, silicon oxides) carbon black pigments (for example, in furnace blacks), metal sulfides, metal chlorides, and mixtures of two or more of the same .
    Particular examples of the dye pigments that can be employed include, for illustrative and non-limiting purposes, yellow pigments having the following yellow pigment color index: PY 83, PY 151, PY 150, PY 155, PY 139, PY 120, PY 180 , PY 129 and PY 154, PY 213. Magenta pigments composed of red pigment having chorus indices of PR 202, PR 254, PR 122, PR 149, PR 185, PR 255, PR 146 and violet pigment having PV color indices 19, PV 23, PV 37 and PV 29 can also be used. Blue pigments having color indices of PB 15: 3, PB 15: 4, PB 15: 2 and PB 15: 1, as well as black pigments having color indices of PBL Black 7 can also be used. Inorganic pigment such as a white pigment of the TiO2 type can also be used. The orange pigment having a color index of PO46, PO64, PO34, as well as pigments having a color index of PG7 can also be employed.
    The amount of particulate pigment in the ink composition depends on the number of factors, for example, the nature of the pigment, the nature of the use of the ink composition, the nature of the blasting mechanism for the ink, and the nature of any additive, for example. example. The ink composition can contain up to 20% by weight of the pigment. In some embodiments, the amount (percentage by weight) of the particulate pigment in the ink composition is about 0.1% to about 20%, or about 0.1% to about 15%, or about 0, 1% to about 10%, or about 0.1% to about 5%, or about 0.5% to about 20%, or about 0.5% to about 15%, or about 0.5% to about 10%, or about 0.5% to about 5%, or about 1% to about 20%, or about 1% to about 15%, or about 1% about 10%, or about 1% to about 5%, or about 2% to about 20%, or about 2% to about 15%, or about 2% to about 10%, or about 2% to about 5%, or about 3% to about 20%, or about 3% to about 15%, or about 3% to about 10%, or about 3% to about 5%, or about 5% to about 20%, or about 5% to about 15%, or about 5% to about 10%, for example. The amount of pigment present in the paint composition can vary between any combination of these values, including the values quoted.
    Other components that may be present in an ink composition, according to the principles described here, are additives that affect various properties of the ink composition. Additives include, but are not limited to, one or more of surfactants or wetting agents (for example, surfactants containing silicon compounds or fluorinated compounds), dispersing agents, UV stabilizers, rheology modifiers, biocides, gliding components, agents leveling agents, preservatives, anti-mold release agents, anti-foaming and stabilizing agents, such as, for example, storage stability improving agents, for example. The total amount by weight of the paint composition additives is about 0.1% to about 1%, or about 0.1% to about 0.5%, or about 0.1% to about 0 , 2%, or about 0.2% to about 1%, or about 0.2% to about 0.5%, or about 0.5% to about 1%, for example.
    Surfactants include, for example, anionic surfactants such as, for example, sodium dodecyl sulfate, sodium dodecyloxysulfonate and sodium alkylbenzenesulfonate, cationic surfactants such as, for example, cetylpyridinium chloride, trimethylketylammonium chloride and tetrabutylammonium chloride; and nonionic surfactants such as, for example, polyoxyethylene nonylphenyl ether, depolyoxyethylene naphthyl ether and polyoxyethylene octylphen ether. Other surfactants include, but are not limited to, amphoteric surfactants, silicon-free surfactants, fluorosurfactants, and polysiloxanes, for example. More specific examples of surfactants are those commercially available such as, but not limited to, WET® 500, WET® 510, GLIDE® 100, GLIDE® 450, GLIDE® 450 and GLIDE® 410 (all available from Evonik Tego Chemie Service GmbH, Essen, Germany); BYK® 307, BYK® 308, BYK® 333, BYK® 341, BYK® 346, BYK® 347, BYK® 348, BYK® 349 (available from BYK Chemie GmbH, Wesel, Germany); DYNAX® 4000 and DYNAX® 4010 (both available from DYNAS Corp, Pound Ridge NY); 3M NOVEC® FC 4430, 3M NOVEC® FC 4 4 32 and 3M NOVEC® FC4 4 34 (All available from 3M Energy and Advanced Materials Division, St. Paul MN); and ZONYL® FSO (DuPont de Nemours & Company, Wilmington De), for example.
    Specific examples of leveling agents that are commercially available include, but are not limited to, FLOW® 425, GLIDE® 406, and GLIDE® 440 (Tego Chemie Service GmbH); SURFYNOL® 104PG50, surfynol® 104, SURFYNOL® SE, SURFYNOL® MD30, SURFYNOL® CT-121, SURFYNOL® CT-141, and SURFYNOL® CT-151 (All available from Air Products and Chemicals, Inc., allentown PA); ZONYL® FSO, ZONYL® FSP, or ZONYL FS-62 (DuPont de Nemours & Company), for example.
    Specific examples of anti-foaming agents are commercially available include, but are not limited to, FOAMEX® 800, FOAMEX® 805, FOAMEX® 845, FOAMEX® 842, FOAMEX® 835 (all available from Evonik Tego Chemie Service GmbH), and TWIN ® 400 (Evonik Tego Chemie Service GmbH); BYK® 019, BYK® 028, BYK® 029 (available from BYK Chemie GmbH); and SURFYNOL® 104PG50, SURFYNOL® MD30 (all available from Air Products and Chemicals, Inc.), for example.
    Examples of dispersants include high molecular weight copolymers with groups having an affinity for a pigment, specific examples of dispersants include those commercially available from BYK Chemie GmbH under the names BYK® 348, BYK® 345, BYK® 346, BYK® 347, BYK® 301, BYK® 302, BYK® 308, BYK® 024, BYK® 023, BYK®-036, and BYK® 080.
    Examples of rheology modifiers include, but are not limited to, ACRYSOL® RMA-5000 and ACRYSOL® RM-825 (Rohm & Haas, a wholly owned subsidiary of the Dow Chemical Company); BORCHIGEL® L75N, BORCHIGEL® L0625, and BORCHIGEL®L W44 (All available from OMG Borchers GmbH, Langenfield, Germany) BYK® 428 and BYK® 429 (Both available from BYK Chemie GmbH); and DSX® R2000 E, DSX® R3000 E, and DSX® R3075 E (All available from Cognis GmbH, Monheim am Rhein, Germany), for example.
    Some examples according to the principles described here refer to methods for preparing an ink composition. In the methods, a combination is provided, which comprises water, a suspension of acrylic latex polymer, a suspension of polyurethane, a suspension of polyethylene wax, and an organic solvent comprising about 10% to about 30% of the composition of ink. The amount of water in the combination is greater than about 60% by weight of the combination. The combination is subjected to conditions under which the composition and paint becomes substantially uniform and then the combination is subjected to filtration.
    In some examples, conditions to result in the ink composition in a substantially uniform dispersion include, for example, agitation, such as, for example, one or more mixing, stirring, mixing, homogenization, sonication, ultrasonication, microfluidization, bead grinding , and combination, for example, or a combination of the above. In some examples, the temperature during the above procedure can be, for example, about 10 ° C to about 40 ° C, or about 10 ° C to about 30 ° C, or about 10 ° C to about 20 ° C, or about 15 ° C to about 40 ° C, about 15 ° C to about 30 ° C, or about 15 ° C to about 20 ° C, or about 20 ° C to about 40 ° C, or about 20 ° C to about 30 ° C. In some instances, the temperature is room temperature. The duration of the above treatment can be, for example, about 0.5 hour to about 5 hours, or about 0.5 hour to about 3 hours, or about 0.5 hours to about 2 hours, or about 0.5 hours to 1 hour, or about 1 hour to about 5 hours, or about 1 hour to about 3 hours, or about 1 hour to about 2 hours. The phrase 'substantially uniform' means that there is no visible phase separation and that the paint composition applied in portions results in a uniform film with no visible defect such as dehumidification, grouping, or air bubbles, for example.
    The paint composition can be filtered by removing large particles that may prohibit safe sandblasting.
    These particles can come from one or more of the pigment dispersions, latex suspensions, polyurethane suspensions, and polyethylene wax suspensions, and one or more of the contamination of the organic solvents, water and additives used. Filtration can be performed using, for illustrative and non-limiting purposes, one or more membrane filtration, surface filtration, deep filtration, sieve filtration, and auxiliary filtration, for example.
    In some examples, according to the principles described here, the composition and ink finds use as inkjet inks for inkjet printers. In some instances, ink compositions can be dispersed on the surface of a wide range of substrates using inkjet technology and equipment. The substrate can be planar, either smooth or coarse, or such as another shape that is appropriate for the particular purpose for which it is employed. The substrate can be porous or non-porous, rigid, semi-rigid, or flexible, for example. Planar substrates can be in the form, for example, of a film, plate, cardboard, or sheet for illustrative and non-limiting purposes. Examples of substrate materials include, but are not limited to, plastic substrates to, plastic substrates (for example, cellulosic diacetate, cellulosic triacetate, cellulosic propionates, cellulosic butyrate, cellulosic acetate butyrate, nitrocellulose, polyethylene terephthalate, polyethylene, polystyrene, polypropylene , polycarbonate, polyvinyl acetal, and acrylic), paper, paper laminated with plastic (for example, polyethylene, polypropylene, or polystyrene), cardboard, cardboard, foam boards, and textiles, for example.
    In some examples, according to the principles described here, the substrate has a thickness of about 0.1 mm to about 10 mm, or about 0.1 mm to about 5 mm, or about 0.1 mm about 1 mm, or about 0.1 mm to about 0.6 mm, or about 0.5 mm to about 10 mm, or about 0.5 mm to about 5 mm, or about 0 , 5 mm to about 1 mm, or about 0.5 mm to about 0.6 mm, or about 1 mm to about 10 mm, or about 1 mm to about 5 mm, or about 1 mm to about 2 mm, for example.
    For inkjet printing, the ink composition is heated or cooled to an appropriate dispersion temperature such as, for example, the distribution temperatures mentioned above, before the ink composition is ejected onto the surface of a substrate. The particular temperature and viscosity of the ink composition are dependent, for example, on a particular method and on an equipment for conducting inkjet printing. Considerations related to the temperature and viscosity of the paint composition refer to the effect of the drop size and the drop ejection rate, for example. In some examples, the temperature is kept relatively constant, meaning that the temperature variation is controlled so that there is no more than a variation of + 1 ° C, or + 0.5 ° C, or + 0.2 ° C, or + _ 0, 1 ° C, for example. Temperature control is achieved with appropriate temperature sensors, for example.
    Examples of ink compositions, in accordance with the principles described here, can be distributed from any piezoelectric device, inkjet printing device with falling demand and many of the said devices are commercially available. Said inkjet printing device is available from Hewlett-Packard, Inc., Paio Alto, CA, for illustrative and non-limiting purposes. In inkjet printing, liquid ink droplets are applied in a controlled manner to the ink receiving substrate by ejecting the ink droplets from a plurality of nozzles, or holes, in a print head of a printing device. inkjet printing or inkjet printer. In a droplet demand system, a droplet of ink is ejected from a hole directly into a position on the surface of a substrate receiving the pressure paint created by, for example, a piezoelectric device, an acoustic device, or a thermal process controlled according to digital data signals. A drop of ink is not generated and ejected through the printhead holes unless necessary. The volume of the ejected ink droplet is controlled mainly with the print head.
    The temperature of a substrate during the printing process can be in the range of about 25 ° C to about 90 ° C, or about 25 ° C to about 70 ° C, or 25 ° to about 50 °, about from 35 ° C to about 90 ° C, or about 35 ° C to about 70 ° C to about 50 ° C, or about 35 ° C to about 65 ° C, or about 40 ° C to about 70 ° C, or about 55 ° C to about 65 ° C, for example.
    In a particular example of inkjet printing, using ink compositions according to the principles described here, the inkjet printing method and the system employs a piezoelectric printhead and a blasting temperature of about 5 ° C to about 15 ° C with the paint composition. By controlling the ink temperature, the dependence of the ink working point on the conditions of the medium is reduced or eliminated. The system is more stable and easy to use. Reducing the inkjet temperature causes a reduction in water vapor pressure in the ink composition. The lower water vapor pressure means a lower water evaporation rate. Figure 1 illustrates a correlation between water vapor pressure and the ink temperature of the ink composition in an example according to the principles described here. Since the ink composition contains a large amount of water, by lowering the ink temperature to 15 ° C or less, the inkjet safety increases considerably and the ink composition becomes more useful. Said examples of composition according to the principles described here can have blasting safety comparable to other work with water-based paint at 25 ° C while having a much faster drying rate on the substrate and allowing minimal addition of solvents (VOC), for example.
    The present printed or blasted ink can be dried after blasting the ink composition in a predetermined pattern on the substrate. The drying stage can be conducted, by way of illustration and not limitation, by hot air, electric heater or irradiation and light (for example, IR lamps), or a combination of said drying methods. In order to achieve a target performance level it must be distinguishable that drying the paint at a maximum temperature allows the substrate to enable good image quality without deformation of the substrate. The temperature used for drying should be selected taking into account that the fact that various materials of plastic substrates tend to dry and deform at high temperatures. Consequently, the substrate deformation temperature must not be exceeded while drying.
    Examples of a temperature during drying include about 40 ° C to about 150 ° C, or about 40 ° C to about 125 ° C, or about 40 ° C to about 100 ° C, or about 40 ° C to about 80 ° C, or about 40 ° C to about 70 ° C, or about 40 ° C to about 50 ° C, for example. The ink composition, according to the principles described here, enables printing on rigid plastic materials while drying at relatively low temperatures of about 40 ° C to about 70 ° C, or about 40 ° C to about 60 ° C, or about 40 ° C to about 50 ° C, or about 50 ° C to about 70 ° C, or about 50 ° C to about 60 ° C, for example, and as long as it reaches a time fast drying and good image quality.
    In some examples, according to the principles described here, an ink receiving layer can be applied to certain substrates in a pre-treatment stage before blasting the image in order to achieve the required image quality. The ink receiving layer can be applied in a digital pre-treatment stage by applying the ink receiving layer with PIJ printheads, or the ink receiving layer can be applied in the pre-treatment stage by analogous methods such as spray gun or coating rollers, for example. The ink receiving layer serves as a fixative for the ink composition distributed on the surface of a substrate in part to prevent the movement of ink drops on the substrate, where the movement can result in a negative image quality effect. Definitions:
    The following definitions are provided for the terms and phrases used above, which have not been previously defined.
    The phrase "at least" as used here means that the number of items specified can be equal to or greater than the number quoted. The phrase "about" as used here means that the number quoted may differ by more or less than 10%, for example, "about 5" means a range of 4.5 to 5.5. The term "between" when used in conjunction with two numbers such as, for example, "between about 2 and about 50" includes both numbers cited.
    Numerical values such as proportions, quantities, temperatures and time periods, for example, can be presented here in a strip format. It should be understood that the said range format is used merely for convenience and brevity and should be interpreted to include not only the numerical values explicitly cited as the range limits, but also to include all individual numeric values or sub-ranges covered within the range as if each numeric value and subrange is explicitly quoted.
    As used here, the singular forms "one", "one", and "o", "a" include the reference to the plural unless the content clearly dictates otherwise. In some instances, "one" or "one" as used here, means "at least one" or "one or more". Designations such as "first" and "second" are used only for the purpose of differentiating between two items such as "first polymer" and "second polymer" and do not mean to imply any sequence or order or importance in one item over another or in any order of operation, for example.
    The term "heteroatom" as used here means nitrogen, oxygen, phosphorus or sulfur. The term "heterocyclic" means having an alicyclic or aromatic ring structure, which includes one or more heteroatoms.
    The term "aromatic" as used herein includes monocyclic rings, bicyclic ring systems, and polycyclic ring systems, in which the monocyclic ring, or at least a portion of the bicyclic ring system or polycyclic ring system, is aromatic (features, for example, n-conjugation). Monocyclic rings, bicyclic ring systems, and the polycyclic ring system, of the aromatic ring system, can include carbocyclic rings and / or heterocyclic rings. The term "carbocyclic ring" denotes a ring in which each ring atom is carbon. The term "heterocyclic ring" denotes a ring in which at least one ring atom is not carbon and comprises 1 to 4 hetero atoms. EXAMPLES
    The following examples are given by way of illustration and not to limit the scope of protection of the principles described here and in the appended claims. Various modifications and alternative compositions, methods, and systems can be envisaged without departing from the spirit and scope of protection of this description. Unless otherwise indicated, materials in the experiments described below can be purchased from Aldrich Chemical Company, St. Louis, MO. Parts and percentages are by weight unless otherwise indicated. Abrasion test procedure - A 2 lb weight Wallace Rubproofness tester (Wallace Instruments, Redhill, United Kingdom) was used in the paint abrasion test. Circular samples with a diameter of 50 mm (500 mm) were cut from the printed sample. The circular samples were attached to the Wallace Rubproofness tester so that the side paint was coated on the abrasion paper. The circular sample was rotated against a 115 mm diameter of the abrasion paper under constant pressure. The hugging paper used in the test was MELLOTEX® glossy white grade paper (Davies Harvey & Murrell, Ltd., Essex, England). The abrasion results were analyzed by measuring the change in optical density within the tested sample.
    Adhesion test procedure - the adhesion test was performed according to ASTM 3359 - "Measuring Adhesion by Tape Test". The cuts were made on the printed sample using a programmed cross cutter, such as the ELCOMETER® 1542 Cross Hatch Adhesion Tester (Elcometer Inc., Rochester Hills, MI). The adhesive tape, 3M SCOTCH® 250, was placed and smoothed over the cutting area. The tape was quickly removed in one movement and the cutting area was inspected. The results were reported according to the removal of the paint from the substrate. If no ink was removed, the result was graded at 5, if more than 6% of the paint was removed, the result was graded at 0. Example 1;
    An ink composition was prepared according to the principles described here. The ink composition had the composition shown in Table 1. The total amount (weight percentage) of water in the composition was the amount of water added plus the amount of water obtained from the reagents as supplied by the vendor.

    The ink ingredients of the ink composition were mixed for 1 hour in a DISPERMA® mixer (BYK USA, Inc., Wallingford (CT) until a uniform dispersion was achieved. The disoersion was filtered through a 12 micron absolute membrane filter A HAAKE® RS-600 rheometer (Thermo Electron, Newington NH) was used to measure the viscosity of the paint, which was around 10cp at 20 ° C. The surface tension of the paint, as measured on a LAUDA® tensiometer ( LAUDA Brinkmann LP, Delran NJ) was about 28 dynes / cm at room temperature.
    The ink composition was blasted onto a RICOH® E3 Piezo printhead (Ricoh Printing Systems America, Simi Valley CA) on the following substrates: AVERY® MPI 1005 vinyl (Avery Dennison, Painesville OH), AVERY® MPI 3000 vinyl ( Avery Dennison), 3M CONTROLTAC® IJ40-10 vinyl (3M Europe SA / NV Commercial Graphics, Diegem, Belgium), YUPO® FPU 250 polypropylene film (Yupo Corporation, Tokyo, Japan), DICKSON® Jet210 PVC banner (Dickson Coatings USA , Atlanta GA), GATORFOAM® extruded polystyrene foam board (Alcan Inc., Montreal, Canada), KAPA® foam board (Alcan), SINTRA® PVC foam (Alcan Inc.), PLEXIGLASS® acrylic sheet (Rohm and Haas Company), LEXAN® polycarbonate sheet (SABIC Innovative Plastics, Mt. Vernon, IN), and COROPLAST® corrugated polypropylene (Coroplast Inc., Dallas TX).
    The printed image was dried in a temperature-controlled oven for 30 seconds at a temperature of 90 ° C. The samples were dried until the printed ink became sticky and fat free at the touch of the fingers.
    The printed samples were allowed to cool to room temperature for 1 hour after which the printed samples were tested for abrasion and adhesion resistance, according to the procedures mentioned above.
    The printed samples prepared using the ink composition of this Example 1 were tested for abrasion resistance, according to the procedure above. The change in optical density after the abrasion resistance test of the paint composition, according to Example 1 was from h% to 3% dpDAndAndo of the tested substrate. Said minor reduction in optical density is not considered significant and has little effect on image quality. Thus, the above experiments show that the ink composition of Example 1, which is an example of an ink composition according to the principles described here, exhibits high abrasion resistance on a variety of substrates.
    The samples printed on plastic substrates using the ink composition of this example 1 were tested for adhesion according to the procedure above. The paint could not be dragged by the tests on all the aforementioned substrates, the test results are being classified as 5, which means that the paint composition according to the principles described here shows excellent adhesion to the plastic substrates. Example 2:
    An ink composition was prepared according to the principles described here. The ink composition had the ink composition shown in table 2. The total amount (percentage by weight) of water in the composition was the amount of water added, plus the amount of water obtained from the reagents when supplied by the seller.

    The ink ingredients of the ink composition were mixed for 1 hour using a DISPERMAT® mixer until uniform dispersion was achieved. The dispersion was filtered through a 1.2 micron absolute membrane filter. The HAAKE® RS-600 rheometer was used to measure the viscosity of the paint, which was about 10cp at 20 ° C. The surface tension of the paint as measured by the LAUDA® tensiometer was about 27 dynes / cm at room temperature.
    The ink was blasted through an HP SCITEX® Piezo printhead (Hewlett Packard), and the substrate was left on an XY test platform. The safety of the ink blasting was evaluated through the first impression of the image, in which there was no lack of nozzles or any other failure in the nozzles while there was printing. Error-free printing on the nozzles was marked as t = 0. Immediately after the production of this error-free printout, a time measurement was initiated and a second print following a printhead gap during the gap between these two prints. During the completion of the second print, the printed image was inspected. The pass / fail criterion was decided by analyzing the nozzle failure from the first pass to the second (in a line) printed. If there are more than four nozzles that failed to recover by more than 50 pixels, the result was graded as a failure. The maximum time between two flawless prints is called the "de-cap time" and was used as a metric to describe the blasting safety, a longer influence time, better safety.
    The ink of Example 2 was blasted onto a substrate and the printed image was tested according to the method described above. The tests were conducted at an ambient temperature of 24 ° C. The tested printheads / ink had a maximum influence time of 20 seconds.
    The ink of example2 was further tested at a blasting temperature of 10 ° C. The tested sample had a maximum influence time (which is a predetermined period of time in which the viscosity of the liquid ejected in a nozzle increases to a threshold, in which the ejection fails and the nozzle clogs) without affecting the quality of the printed image. Therefore, with a low VOC in the ink composition of example 2, the blasting safety of the ink is significantly improved by blasting the ink at lower temperatures.
    The printed image was dried in a temperature-controlled oven for 10 seconds at a temperature of 90 ° C. The samples were dried until the printed ink became sticky and grease-free by touching the fingers. The printed samples were allowed to cool to room temperature for 1 hour. The printed samples of example 2 were tested using adhesion and abrasion resistance tests as described above; similar results to those obtained for the ink composition of Example 1 were obtained.
    The results obtained in the above experiments demonstrate that the paint composition of both examples, 1 and 2, showed excellent adhesion and resistance to abrasion.
    In addition, these ink compositions have a low organic solvent content, are quick to dry and have good sandblasting safety.
    Although the aforementioned invention has been described in some detail, through illustrations and examples, for the sake of clarity of understanding, it should be easily apparent to those skilled in the art that, in view of the teachings of this invention, certain changes and modifications can be made without escaping the spirit and scope of protection of the attached claims. In addition, the above description, for explanatory purposes, used specific nomenclature to provide a full understanding of the invention. However, it should be apparent to those skilled in the art that specific details are not required to practice the invention.
    Thus, the aforementioned description of specific embodiments of the present invention is presented for illustrative and descriptive purposes only; they are not intended to be exhaustive or to limit the invention to the precise forms described. In addition, the examples here are to be considered illustrative only and are presented for the purpose of discussion and not to limit the invention. Many modifications and variations are possible in view of the teachings mentioned above. The embodiments were chosen and described in order to explain the principle of the invention and its practical application and to enable, in this way, other technicians in the subject to use the invention.
    权利要求:
    Claims (14)
    [0001]
    1. Aqueous inkjet ink composition, characterized by the fact that it comprises: a) at least 60% water by weight, b) a suspension of acrylic latex polymer, c) a suspension of polyurethane, d) a suspension of polyethylene wax, e) an organic solvent comprising 10% to 30% of the ink composition, and f) one or more dyes.
    [0002]
    2. Paint composition according to claim 1, characterized by the fact that the acrylic latex polymer suspension has a glass transition temperature of 50 ° C to 90 ° C and is selected from the group consisting of acrylic homopolymers and copolymers of acrylic monomers and aromatic vinyl monomers.
    [0003]
    Paint composition according to claim 1, characterized in that the polyurethane suspension has a film-forming temperature of 20 ° C to 50 ° C, is substantially free of organic solvents and is selected from the group that consists of aliphatic polyurethane dispersions, aromatic polyurethane dispersions anionic polyurethane dispersions, nonionic polyurethane dispersions, polyurethane aliphatic polyester dispersions, polyurethane aliphatic polycarbonate dispersions, aliphatic acrylic modified polyurethane dispersions, polyurethane aromatic polyester dispersions , dispersions of polyurethane dispersed in aromatic polycarbonate, dispersions of modified aromatic polyurethane polyurethane dispersions and dispersions of modified polyurethane in aromatic acrylic.
    [0004]
    4. Paint composition according to claim 1, characterized in that the suspension of polyethylene wax is selected from the group consisting of low density polyethylene wax emulsions, high density polyethylene wax emulsions, emulsions oxidized polyethylene wax emulsions, ethylene copolymer wax emulsions and polyethylene copolymer wax emulsions.
    [0005]
    5. Ink composition according to claim 1, characterized by the fact that the organic solvent is selected from the group consisting of glycols, glycol ethers, alcohols and heterocyclic ketones.
    [0006]
    6. Paint composition according to claim 1, characterized by the fact that acrylic latex polymer solids are present in the paint composition at 1% to 4% by weight of the paint composition.
    [0007]
    7. Paint composition according to claim 1, characterized by the fact that polyurethane solids are present in the paint composition from 2% to 10% by weight of the paint composition.
    [0008]
    8. Paint composition according to claim 1, characterized by the fact that polyethylene wax solids are present in the paint composition from 0.1% to 2% by weight of the paint composition.
    [0009]
    9. Paint composition according to claim 1, characterized by the fact that a proportion of solids in the acrylic latex polymer suspension: polyurethane suspension and polyethylene wax suspension is 2 to 3: 1: 0.3 to 0.5.
    [0010]
    10. Ink composition according to claim 1, characterized in that the viscosity of the ink composition is 0.005 Pa.s to 0.015 Pa.s at a dispensing temperature of 5 ° C to 40 ° C.
    [0011]
    11. Method for forming a printed substrate, characterized in that it comprises dispensing the aqueous inkjet ink composition as defined in claim 1, on the surface of a substrate.
    [0012]
    12. Method according to claim 11, characterized by the fact that the substrate is a plastic substrate.
    [0013]
    13. Method for preparing an aqueous inkjet ink composition, as defined in claim 1, characterized by the fact that the method comprises: (a) providing in combination water, a suspension of acrylic latex polymer, a suspension of polyurethane , a suspension of polyethylene wax and an organic solvent comprising 10% to 30% of the paint composition and one or more dyes, in which water is greater than 60% by weight of the combination; (b) subjecting the combination to conditions under which the paint composition becomes substantially uniform; and (c) subjecting the combination to filtration.
    [0014]
    14. Method according to claim 13, characterized by the fact that acrylic latex polymer solids are present in the paint composition from 1% to 4% by weight of the paint composition, polyurethane solids are present in the paint composition from 2% to 10% by weight of the paint composition and polyethylene wax solids are present in the paint composition from 0.1% to 2% by weight of the paint composition.
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    同族专利:
    公开号 | 公开日
    CN103502369A|2014-01-08|
    US20140015912A1|2014-01-16|
    EP2691481B1|2017-10-11|
    US9133355B2|2015-09-15|
    WO2012131668A1|2012-10-04|
    JP5842053B2|2016-01-13|
    CN103502369B|2016-08-17|
    JP2014515051A|2014-06-26|
    BR112013021749A2|2016-10-18|
    EP2691481A1|2014-02-05|
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    法律状态:
    2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-04-30| B06T| Formal requirements before examination|
    2020-02-11| B07A| Technical examination (opinion): publication of technical examination (opinion)|
    2020-06-09| B09A| Decision: intention to grant|
    2020-11-17| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 30/03/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/IL2011/000283|WO2012131668A1|2011-03-30|2011-03-30|Aqueous ink compositions and method of preparing same|
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