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    • 专利摘要:
    PHOTOPOLYMERIZABLE INKJET INK, INK CARTRIDGE, AND INKJET PRINTING DEVICE. Provide a light-curing inkjet ink, which contains monomer components, and a polymer or copolymer of styrene, styrene derivative, acrylic acid ester, or acrylic acid, or any combination thereof, in which the monomer components contains: t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination thereof; and glycerol dimethacrylate, and wherein the light-curing inkjet ink is free of a diluting solvent.
    公开号:BR102013013568B1
    申请号:R102013013568-2
    申请日:2013-05-31
    公开日:2021-06-22
    发明作者:Takao Hiraoka
    申请人:Ricoh Company, Ltd；
    IPC主号:
    专利说明:

    KNOWLEDGE OF THE INVENTION Field of Invention
    The present invention relates to a photopolymerizable inkjet ink, an ink cartridge that houses the photopolymerizable inkjet ink, and an inkjet printing device that contains the ink cartridge. Description of Related Art
    Photopolymerizable inkjet inks that use (meth)acrylic acid ester as a base monomer component have been widely used (see, for example, Japanese Open-filed Patent Application (JP-A) No. 2004-526820). Furthermore, it is also known in the art that various functions can be provided to a coating film by adding a polymer component to the photopolymerizable inkjet ink (see, for example, Japanese Patent Application (JP-B) ) No. 07-010894).
    One of the advantages obtained by adding the polymer component to the photopolymerizable inkjet ink is to ensure sufficient adhesion of the polymerizable inkjet ink to a relatively soft base, such as a plastic material, with which a liquid is difficult to penetrate. and ensuring adhesion of a coating film. When the photopolymerizable inkjet ink contains the polymer component, however, the ink viscosity increases significantly due to the polymer component contained. Unless a monomer having sufficiently low viscosity is used as the monomer component in the photopolymerizable inkjet ink, it is difficult to adjust the viscosity of the photopolymerizable inkjet ink containing the polymer component to the range in which the ink can be ejected.
    Additionally, many of the monomer components used in conventional light-curing inkjet inks are toxic. Especially, among (meth)acrylic acid esters, which are cheap and readily available, most (meth)acrylic acid esters having sufficiently low viscosity have high toxicity in terms of skin sensitization, which causes allergic reactions with the skin through contact with such materials. In this way, to achieve the photopolymerizable inkjet ink having no skin sensitization problem and having viscosity low enough to eject the ink at room temperature even when a polymer component is contained is a difficult problem, and this problem is not yet has been resolved in the conventional technique.
    Note that the reduction in viscosity of light cured inkjet ink can easily be achieved by adding a thinning solvent, but the use of thinning solvent is not desirable considering the environment, as the thinning solvent is evaporated and released In the atmosphere. Therefore, the use of thinning solvent in light curing inkjet ink should be avoided. In addition, the viscosity of light-curing inkjet ink can also be reduced by using a water-soluble monomer as the monomer component, and by adding water to the ink. However, such paint cannot expect a penetration and drying effect as used in a base such as plastic material. Therefore, it is necessary to evaporate water to dry the ink to speed up the speed of a printing process, for which equipment such as a heat source is generally required. Therefore, the use of such ink is not preferable in view of energy savings. SUMMARY OF THE INVENTION
    The present invention aims to solve the various problems mentioned above in the art and to achieve the following objective. An object of the present invention is to provide a photopolymerizable inkjet ink which has no skin sensitization problem, has low viscosity in which there is no inkjet ejection problem, and is excellent in adhesion to plastic materials.
    The means to solve the aforementioned problems are as follows.
    A light-curing inkjet ink, which contains: monomer components, and a polymer or a copolymer, wherein the monomer components contain: t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination of the same; and glycerol dimethacrylate, wherein the polymer or copolymer contains styrene, styrene derivative, acrylic acid ester, or acrylic acid, or any combination thereof, and wherein the photopolymerizable inkjet ink is free of a diluting solvent .
    The present invention can solve the various problems in the art and can provide a light-curing inkjet ink which has no skin sensitization problem, has low viscosity in which there is no inkjet ejection problem, and is excellent in adhesion to plastic materials. BRIEF DESCRIPTION OF THE DRAWINGS
    FIG. 1 is a schematic diagram illustrating an example of an ink pouch of the ink cartridge of the present invention.
    FIG. 2 is a schematic diagram illustrating an example of the ink cartridge of the present invention that houses the ink pouch.
    FIG. 3 is a schematic diagram illustrating an example of the ink jet printing device of the present invention. DETAILED DESCRIPTION OF THE INVENTION (Light-curing Inkjet Ink)
    The photopolymerizable inkjet ink (may be referred to as an "ink" hereinafter) of the present invention contains monomer components, and a polymer or a copolymer, and may additionally contain other components, if necessary. Light cure inkjet ink is free of a thinning solvent. <Monomer Components>
    The monomer components contain t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination thereof, and glycerol dimethacrylate, and may additionally contain other monomer components if necessary. «t-Butyl Methacrylate, n-Pentyl Methacrylate, n-Hexyl Methacrylate>>
    T-butyl methacrylate, n-pentyl methacrylate, and n-hexyl methacrylate, which are photopolymerizable monomers (may be referred to as a "monomer component" hereinafter) that are negative for skin sensitization, cheap and readily available, they have low viscosity on their own, i.e., about 1 mPa^s to about 2 mPa*s at 25°C, and are an essential component for lowering the ink viscosity to a range in which the ink can be ejected through the inkjet. The use of these light-curing monomers allows to keep the ink viscosity low enough even when the ink contains a polymer component.
    An amount of t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate or any combination thereof is appropriately selected depending on the intended purpose without any limitation, but the amount thereof is preferably 20 parts by mass to 85 parts by mass, more preferably 40 parts by mass to 85 parts by mass, when a total amount of the monomer components is 100 parts by mass. <<Glycerol dimethacrylate»
    However, sufficient curing properties of the ink cannot be achieved when only the three mentioned light-curing monomers are used. In this way, glycerol dimethacrylate, which is another photopolymerizable monomer that is negative for skin sensitization, inexpensive, and readily available, is contained in the ink so that practical ink curing properties can be achieved.
    An amount of the glycerol dimethacrylate is appropriately selected depending on the intended purpose without any limitation, and the amount thereof is preferably 10 parts by mass to 60 parts by mass, when a total amount of the monomer components is 100 parts by mass. «Other monomer components»
    Other monomer components are appropriately selected depending on the intended purpose without any limitation, and examples thereof include tricyclodecane dimethanol dimethacrylate, isostearyl acrylate, stearyl methacrylate, ethylene oxide-modified phenol acrylate, and other photopolymerizable monomers. - Tricyclodecane Dimethanol Dimethacrylate, Isostearyl Acrylate, Stearyl Methacrylate, Ethylene Oxide Modified Phenol Acrylate.
    The use of tricyclodecane dimethanol dimethacrylate, which is a photopolymerizable monomer that is skin sensitizing negative, inexpensive, and readily available, in combination with the aforementioned monomer components is preferable, while strength of a resulting film coating is improved. .
    An amount of the tricyclodecane dimethanol dimethacrylate is appropriately selected depending on the intended purpose without any limitation, and the amount thereof is preferably 0 parts by mass to 20 parts by mass, when a total amount of the monomer components is 100 parts by mass.
    In addition, the use of isostearyl acrylate, stearyl methacrylate, or ethylene oxide-modified phenol acrylate, or any combination thereof, which is a photopolymerizable monomer that is negative for skin sensitization, is inexpensive, and is readily available. , in combination with the aforementioned monomer components is preferable, while the flexibility of a resulting coating film is improved.
    An amount of the isostearyl acrylate, the stearyl methacrylate, or the ethylene oxide modified phenol acrylate, or any combination thereof is appropriately selected depending on the intended purpose without any limitation, but the amount thereof is preferably 0 parts by mass to 10 parts by mass, 5 when the total amount of the monomer components is 100 parts by mass.
    Negative photopolymerizable skin sensitizing monomer refers to a compound that satisfies at least one of the following (1) to (3): (1) a compound having a Stimulus Index (SI Value) of less than 3, where the Stimulus index indicates the level of sensitization as measured by the skin sensitization test based on the LLNA (Local Lymph Node Assay); (2) a compound assessed as "skin sensitizing negative" or "no skin sensitization" in its MSDS (Material Safety Data Sheet); and (3) a compound evaluated as "skin sensitizing negative" or "no skin sensitization" in the literature [eg, Contact Dermatitis 8 223 to 235 (1982)].
    With respect to the above in (1), the compound having an SI value of less than 3 is considered negative for skin sensitization as described in the literature, eg "Functional Material" (Kino Zairyou) September 2005, Vol. 25, No. 9, p. 55. The lower the SI value means the lower the level of skin sensitization. Thus, in the present invention, a monomer having the lower SI value is preferably used. The SI value of the monomer used is preferably less than 3, more preferably 2 or less, and even more preferably 1.6 or less.
    Other photopolymerizable monomers
    In addition to skin-sensitizing negative photopolymerizable monomers, the following (meth)acrylates, (meth)acrylamides, and vinyl ethers can be used as other photopolymerizable monomers, as long as a resulting ink does not have a problem, even if they have a skin sensitization problem to some degree when used alone, or skin sensitization of the same is not confirmed.
    Examples of (meth)acrylate, (meth)acrylamide, and vinyl ether include ethylene glycol di(meth)acrylate, hydroxypivalic acid neopentyl glycol di(meth)acrylate, ybutyrolactone acrylate, isobornyl(meth)acrylate, trimethylol propane mono Formed (meth)acrylate, polytetramethylene glycol di(meth)acrylate, trimethylol propane benzoate (meth)acrylic acid, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate [CH2=CH-CO(OC2H4) n- OCOCH=CH2 (n»9)], [CH2=CH-CO (OC2H4) Π-OCOCH=CH2 (n»14)], [CH2=CH-CO(OC2H4) n-OCOCH=CH2 (n»23) ], dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, polypropylene glycol dimethacrylate [CH2=C(CH3) -CO-(OC3H6) n-OCOC(CH3) =CH2 (n'7)], 1 ,3-butanediol diacrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, tricyclodecane dimethanol diacrylate , bisphenol A di(meth)acrylate modified by propylene oxide, polyethylene glycol di(meth)acrylate, dipentaerythritol hexa(meth)acrylate, (meth)acryloyl morpholine, 2-hydroxypropyl (meth)acrylamide, tetramethylol methane propylene oxide-modified tetra(meth)acrylate, dipentaerythritol hydroxypenta(meth) )acrylate, dipentaerythritol hydroxypenta(meth)acrylate modified by caprolactone, ditrimethylol propane tetra(meth)acrylate, pentaerythritol tetra(meth)acrylate, trimethylol propane acrylate, trimethylol propane triacrylate modified by ethylene oxide, trimethylol propane tri(meth)acrylate propylene oxide, trimethylol propane tri(meth)acrylate modified by caprolactone, pentaerythritol tri(meth)acrylate, tris(2-hydroxyethyl)isocyanurate tri(meth)acrylate, ethoxylated neopentyl glycol di(meth)acrylate, neopentyl glycol di(meth) propylene oxide modified acrylate, glyceryl propylene oxide modified tri(meth)acrylate, polyester di(meth)acrylate, polyester tri(meth)acrylate, polyester tetra(meth)acrylate, penta(meth)acryl polyester ylate, polyester poly(meth)acrylate, N-vinyl caprolactam, N-vinyl pyrrolidone, N-vinyl formamide, polyurethane di(meth)acrylate, polyurethane tri(meth)acrylate, polyurethane tetra(meth)acrylate, polyurethane penta(meth) )acrylate, polyurethane poly(meth)acrylate, triethylene glycol divinyl ether, cyclohexane dimethanol divinyl ether, cyclohexane dimethanol monovinyl ether, hydroxyethyl vinyl ether, diethylene glycol monovinyl ether, diethylene glycol divinyl ether, dicyclopentadiene vinyl ether, tricyclodecane vinyl ether, benzyl vinyl ether, ethyloxtacene methyl vinyl ether, triethylene glycol divinyl ether, hydroxybutyl vinyl ether, and ethyl vinyl ether. These can be used alone, or in combination.
    Amounts of the other aforementioned photopolymerizable monomers are appropriately selected depending on the intended purpose without any limitation. <Polymer or copolymer>
    The polymer or copolymer is a styrene polymer or copolymer, derived from styrene, acrylic acid, or acrylic acid ester, or any combination thereof.
    The ink that contains the polymer or copolymer as the polymer component. As a result, excellent adhesion of the ink to the plastic film can be achieved. Note that the polymer component is hardly ever passed through a skin, as it has a large molecular weight, and thus the polymer component in general does not have a skin sensitization problem.
    The polymer component desirably has excellent dissolution capacity of the monomer components. Therefore, a polymer or a copolymer having a cross-linking structure is not suitable, and a copolymer or a chain polymer is preferable as the polymer component. Furthermore, a polymer or a copolymer having an excessively large molecular weight is not preferable even if it has a chain structure, because the workability is significantly affected when the polymer component is dissolved in the ink. In this way, the mass average molecular weight of a polymer or a copolymer used as the polymer component is preferably less than 100,000. Additionally, it is also important that a polymer or a copolymer is not so rigid, and the crystallinity of the same is not so high, in view of the solubility. In addition, in view of practical use, it is also important that it be cheap and readily available. In view of the above-described points, one type of polymer or copolymer used as the polymer component is preferably a styrene, styrene derivative, acrylic acid, or acrylic acid ester polymer or copolymer, or any combination of the above. same. A polymer containing a vinyl, acrylamide, or derivative thereof, polyurethane, or polyester based monomer may also be used. Whereas low molecular weight polymer or copolymer is preferable as described above, however, a polymer having the highest glass transition temperature is more preferable as such a polymer does not tend to cause tack on a surface of a coating film. cured of a resulting ink, assuming a situation that the coated printing ink is laminated. In this way, the polymer or copolymer mentioned above is preferable. Note that the monomer components, ie, t-butyl methacrylate, n-pentyl methacrylate, and n-hexyl methacrylate, have greater hydrophobicity, and thus it is preferred that the polymer component does not contain an excessively large amount of polar groups in view of the dissolution capacity. In this way, the acid value of the polymer component is preferably 108 mg KOH/g or less, as described in the Examples below.
    An amount of the polymer or copolymer is appropriately selected depending on the intended purpose without any limitation, and the amount thereof is preferably 5 parts by mass to 20 parts by mass, when a total amount of the monomer components is 100 parts by mass. «Other components>
    The other components mentioned above are appropriately selected depending on the intended purpose without any limitation, and examples thereof include a photoradical polymerization initiator, a polymerization accelerator, and a colorant. <<Photoradical polymerization initiator>>
    The ink of the present invention may contain a photoradical polymerization initiator. As for the photoradical polymerization initiator, a photoradical polymerization initiator which is negative for skin sensitization is preferably used.
    (Meth)acrylic acid ester, (meth)acrylamide, derivatives thereof, and vinyl ether are also known to have cationic polymerization properties. Photocationic polymerization initiators are generally expensive and generate a small amount of strong acid or strong alkali even in the state where they are not irradiated with light. Thus, it is necessary to take special care such as imparting acid resistance and base resistance to an ink supply channel of an inkjet coating system, which imposes limitation on the choice of members that constitute an inkjet coating system. ink.
    In contrast, the ink of the present invention can utilize a photoradical polymerization initiator which is inexpensive and which generates in strong acid or strong alkali. Thus, it is possible to produce an ink at low cost, and it is also easy to choose members of an inkjet coating system. Needless to say, when using a light source of somewhat high energy, such as electron beams, a-rays, β-rays, y-rays or X-rays, the polymerization reaction can proceed to be the polymerization initiator. This is a conventionally known matter, and not described in detail in the present invention.
    The photoradical polymerization initiator is appropriately selected depending on the intended purpose without any limitation, and examples thereof include a self-cleaving photopolymerization initiator and a hydrogen abstraction photopolymerization initiator. These can be used alone, or in combination.
    Examples of the self-cleaving photopolymerization initiator include 2,2-dimethoxy-1,2-diphenyletan-1-one, 1-hydroxy-cyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl )benzyl]phenyl}-2-methyl-1-propan-1-one, phenylglyoxylic acid methyl ester, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, 2-benzyl -2-dimethylamino-1-(4-morpholinophenyl)butanone-1,2-dimethylamino-2-(4-methylbenzyl)-1-(4-morpholin-4-yl-phenyl)butan-1-one, bis oxide (2,4,6-trimethylbenzoyl)phenyl phosphine, bis(2,6-dimethoxybenzoyl)-2,4,4-trimethyl-pentylphosphine oxide, 2,4,6-trimethylbenzoyl phosphine oxide, 1,2-octanedion- [4-(phenylthio)-2-(o-benzoyloxime)], ethanone-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-1-(O-acetyloxime) and [4-(methylphenylthio)phenyl]phenylmethanone.
    Examples of the hydrogen abstraction photopolymerization initiator include: benzophenone compounds such as benzophenone, methylbenzophenone, methyl-2-benzoylbenzoate, 4-benzoyl-4'-methyldiphenyl sulfide and phenylbenzophenone; and thioxanthone compounds such as 2,4-diethylthioxanthone, 2-chlorothioxanthone, isopropylthioxanthone and 5 1-chloro-4-propylthioxanthone. «Polymerization accelerator>>
    Furthermore, the ink of the present invention may contain amine as a polymerization initiator, in combination with the photoradical polymerization initiator.
    The polymerization accelerator is appropriately selected depending on the intended purpose without any limitation, and examples thereof include p-dimethylaminobenzoate, 2-ethylhexyl p-dimethylaminobenzoate, methyl p-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate and butoxyethyl p-dimethylaminobenzoate. These can be used alone, or in combination.
    For example, when t-butyl methacrylate, n-pentyl methacrylate, and n-hexyl methacrylate are determined as a group of compound (A); glycerol dimethacrylate is determined as a compound (B); tricyclodecane dimethanol dimethacrylate is determined as a compound (C); isostearyl acrylate, stearyl methacrylate, and ethylene oxide-modified phenol acrylate, which are photopolymerizable monomers that are negative for skin sensitization, inexpensive, and readily available, are determined as a compound group (D); an equimolar mixture of a polymerization initiator that is negative for skin sensitization, inexpensive, and readily available (ie, 1-hydroxy-cyclohexylphenylketone, 2-dimethylamino-2-(4-methylbenzoyl)-1- (4-morpholin-4-yl-phenyl)butan-1-one, and 2,4-diethylthioxanthone) and a polymerization accelerator (i.e., 2-ethylhexyl p-dimethylbenzoate) were determined as a group of compound (E); the polymer or copolymer, which is a polymer component, is determined as a compound group (F); and a total amount of the monomer components is 100 parts by mass, an amount of the compound (A) group is preferably 40 parts by mass to 85 parts by mass, an amount of the compound (B) is preferably 10 parts by mass to 60 parts by mass, an amount of the compound (C) is preferably 0 parts by mass to 20 parts by mass, and an amount of the group of compound (D) is preferably 0 parts by mass to 10 parts by mass. Furthermore, an amount of the compound group (E) is preferably 12 parts by mass to 20 parts by mass, and an amount of the compound group (F) is preferably 5 parts by mass to 20 parts by mass, when a total amount of the monomer components is 100 parts by mass. <<Dye»
    The ink of the present invention can be made as a clear ink without a dye, or it can be made as a color ink with the dye, depending on the intended purpose. It is preferred that materials having less ink are used than the aforementioned dye or the dye mentioned below, when the ink is made as a clear, uncolored clear ink, or when it is desired to maintain a color tone of the dye alone or as much as possible.
    When the dye is contained in the ink of the present invention, such dye can be appropriately selected from conventional inorganic pigments and conventional organic pigments, and examples thereof include various colored pigments, such as a conventional black pigment, yellow pigment, magenta pigment, cyan pigment, and white pigment. These can be used alone, or in combination.
    Examples of the black pigment include carbon black produced by a furnace method and a channel method.
    Examples of the yellow pigment include pigments from Pigment Yellow Series, such as Pigment Yellow 1, Pigment Yellow 2, Pigment Yellow 3, Pigment Yellow 12, Pigment Yellow 13, Pigment Yellow 14, Pigment Yellow 16, Pigment Yellow 17, Pigment Yellow 73, Pigment Yellow 74, Pigment Yellow 75, Pigment Yellow 83, Pigment Yellow 93, Pigment Yellow 95, Pigment Yellow 97, Pigment Yellow 98, Pigment Yellow 114, Pigment Yellow 120, Pigment Yellow 128, Pigment Yellow 129, Pigment Yellow 138, Pigment Yellow 150, Pigment Yellow 151, Pigment Yellow 154, Pigment Yellow 155, and Pigment Yellow 180.
    Examples of the magenta pigment include Pigment Red Series pigments, such as Pigment Red 5, Pigment Red 7, Pigment Red 12, Pigment Red 48(Ca), Pigment Red 48(Mn), Pigment Red 57(Ca), Pigment Red 57 :1, Pigment Red 15 112, Pigment Red 122, Pigment Red 123, Pigment Red 168, Pigment Red 184, Pigment Red 202, and Pigment Violet 19.
    Examples of the cyan pigment include Pigment Blue Series pigments, such as Pigment Blue 1, Pigment Blue 20 2, Pigment Blue 3, Pigment Blue 15, Pigment Blue 15:3, Pigment Blue 15:4, Pigment Blue 16, Pigment Blue 22 , Pigment Blue 60, Vat Blue 4, and Vat Blue 60.
    Examples of the white pigment include: sulfuric acid salts of alkaline earth metals such as barium sulfate; alkaline earth metal carbonic acid salts such as calcium carbonate; silica such as fine silylic acid powder and synthetic silylic acid salts; calcium silicate; alumina; alumina hydrate; titanium oxide; zinc oxide; baby powder; and clay.
    In addition, various organic or inorganic pigments can optionally be used considering, for example, the physical properties of the paint.
    Additionally, in the ink of the present invention, a polymerization inhibitor (eg, 4-methoxy-1-naphthol, methylhydroquinone, hydroquinone, t-butylhydroquinone, di-t-butylhydroquinone, methoquinone, 2,2' -dihydroxy-3,3'-di(α-methylcyclohexyl)-5,5'-dimethyldiphenylmethane, p-benzoquinone, di-t-butyl diphenylamine, and 9,10-di-n-butoxyanthracene, 4,4' —[1,10-dioxo-1,10-decandylbis(oxy)] bis[2,2,6,6-tetramethyl]-1-piperidinyloxy), a surfactant (eg large fatty acid ester containing polyether, an amino group, a carboxyl group, or a hydroxyl group, a polydimethylsiloxane compound that contains, in its side or terminal chain, polyether, an amino group, a carboxyl group, or a hydroxyl group, and a fluoroalkyl compound that contains a residue of polyether, an amino group, a carboxyl group, and a hydroxyl group), and a polymer pigment dispersing agent containing a polar group may optionally be used.
    The physical properties of the ink are preferably matched with the specifications necessary for an inkjet ejection head for use. Various types of inkjet ejection heads are branded on us from various manufacturers, and among them there are ejection heads that have great ejection performances and can eject a high viscosity ink, or ejection heads that have a function temperature adjustment over a wide temperature range. Considering such market trends, the ink viscosity is preferably 2 mPa*s to 150 mPa-s, more preferably 5 mPa*s to 18 mPa-s at 25°C. As described above, however, an inkjet ejection head having a temperature adjustment function can be used. In the case where the viscosity of the ink of the present invention is excessively high at 25°C, the head is suitably heated to reduce the viscosity of the ink. Assuming the heating condition is 60°C in such a case, the ink viscosity is preferably 2 mPa*s to 20 mPa*s, more preferably 5 mPa*s to 18 mPa-s at 60°C. In view of energy savings or short start-up time, it is preferred that the ink is ejected without heating.
    A coated print product obtained using the ink of the present invention has no skin sensitization problem even when a small amount of the uncured monomer components is kept, and does not cause skin sensitization even when it is touched by hands or fingers. . In this way, the coated printing product is highly secure. (Cartridge)
    The ink cartridge of the present invention contains the ink of the present invention and a container, and may additionally contain other members, such as an ink pouch, if necessary.
    The ink of the present invention can be housed in a container, and used as an ink cartridge. With this way, users do not need to directly touch the ink during operations, such as when changing ink, and so there is no worry about staining their fingers, hands, clothes, etc. In addition, it is possible to avoid the interfusion of foreign matter such as dust in the paint.
    The container is not particularly limited, and a shape, structure, size, and material thereof can be selected appropriately depending on the intended purpose. As for the container, for example, a container having an ink pouch formed from a laminated aluminum film, or a resin film, is preferred.
    The ink cartridge will be explained with reference to FIGs. 1 and 2. FIG. 1 is a schematic diagram illustrating an example of an ink pouch 241 of the ink cartridge, and FIG. 2 is a schematic diagram illustrating the ink cartridge 200 in which the ink pouch 241 of FIG. 1 is housed in a 244 cartridge case.
    As illustrated in FIG. 1, the ink bag 241 is filled with ink by injecting the ink from an ink inlet 242. After removing air present inside the ink bag 241, the ink inlet 242 is sealed by a fusion connection. . At the time of use, a needle attached to the main body of the device is inserted into an ink outlet 243 formed from a rubber member to supply ink to the device through it. The ink pouch 241 is formed from a roll-up member such as a non-air permeable aluminum laminated film. As illustrated in FIG. 2, ink pouch 241 is typically housed in a plastic cartridge case 244, which is then detachably mounted to various ink jet recording devices for use thereby as ink cartridge 200.
    The ink cartridge of the present invention is preferably detachably mounted to ink jet recording devices. The ink cartridge can simplify ink refilling and changing to improve workability. (Inkjet printing device)
    The inkjet printing device of the present invention contains the ink cartridge of the present invention, and may additionally contain other members.
    FIG. 3 is a schematic diagram illustrating an example inkjet printing device (printer).
    FIG. 3 illustrates an example for forming a color image as follows. Specifically, print units 3 [ie, print units 3a, 3b, 3c, and 3e, each of which is for a single color (eg, yellow, magenta, cyan, or black)] eject color inks (yellow , magenta, cyan, and black) on a print base 2 (which is transported from left to right in FIG. 3) from a print base feed roller 1. Each time the inks are ejected, light (UV light) is applied from UV light sources (curing light sources) 4a, 4b, 4c, and 4d to the corresponding color inks for curing, to thereby form a color image. Each of the 3a, 3b, 3c, and 3d printing units has a heating system to heat the ink to make the ink liquefied in a portion where the ink is ejected, and a cooling system which optionally cools the base to approximately of ambient temperature in a contact or non-contact manner in a base detent portion (i.e. a portion above or below the base in FIG. 3). In the case where the print area of the previously printed color is small and the base transport speed is small, the base is naturally cooled and kept at about room temperature for the subsequent printed color ink. In the case 10 where the print area of the pre-printed color is large and the base transport speed is large, however, the base temperature is increased. Therefore, it is preferred that a cooling system for maintaining the base temperature to about room temperature is optionally provided.
    As for printing base 2, for example, paper, a film, metal, or a composite material thereof is used.
    Furthermore, FIG. 3 illustrates an embodiment that the printing pad 2 is a roller, but the printing pad 2 may be a blade. In addition, the base can be subjected to double-sided printing as well as single-sided printing.
    When UV rays are applied to each of the colored inks for all printing processes, the colored inks are cured satisfactorily. In order to achieve high speed printing, UV light sources 4a, 4b and 4c can be lowered in output energy or can be omitted, so that the UV light source 4d is made to apply a sufficient dose of UV rays. to a composite printed image formed from a plurality of colors. In addition, to realize energy savings and cost reduction, LED light sources, which have recently been used practically for printing photopolymerizable inks, can be used instead of conventionally used light sources such as high mercury lamps. pressure and metal halide lamps.
    In FIG. 3, reference numeral 5 denotes a processing unit and reference numeral 6 denotes a take-up roll for printed products. Although not illustrated in FIG. 3, the ink cartridge is housed in each of the printing units to stably supply the ink during printing.
    As for a coating base for the ink of the present invention, paper, plastic, metal, ceramic, glass, or a composite material thereof is used. As an absorbent base, such as wood-free paper, a penetration and drying effect can be expected, it is practical to use an aqueous ink or an oil ink, which is not a fast drying ink, for such a base. On the other hand, it is practical to use a quick-drying ink for a non-absorbent base, such as gloss overlay paper, a plastic film, a molded article of plastic, ceramic, glass, and metal. For such a base, the ink of the present invention is preferably used, as the ink of the present invention is cured immediately by applying light.
    The ink of the present invention is particularly suitably used for such a non-absorbent base. Among the non-absorbent bases, the ink of the present invention is suitably used for a plastic material, such as a plastic film, and a plastic molded article, which is formed from polyethylene, polypropylene, polyethylene terephthalate, polycarbonate, an ABS resin. , polyvinyl chloride, polystyrene, any of other polyesters, polyamide, a vinyl-based material, or a composite material thereof. For the purpose of activating a surface to improve adhesion, the plastic material is generally subjected to a corona treatment. Even after such a treatment, it is generally difficult to form an image or a coating film and exhibit excellent adhesion to it, as the plastic material has fewer polar groups on its surface compared to paper, metal, ceramic or glass, and is inactive. However, the ink of the present invention can form an image or coating film and exhibit excellent adhesion to a plastic material surface.
    Furthermore, it is preferred that the image or coating film formed on the plastic material has sufficient strength, depending on the use. In the case where a thin plastic material, such as film, is used as the plastic material, it is expected that a process for bending the material is carried out after forming an image or coating film on it. In such a case, it is more preferred that the cured ink has flexibility so that the cured ink can match the deformation of the coating base. Examples
    Examples of the present invention will be explained hereinafter, but the Examples are not to be interpreted as limiting the scope of the present invention.
    <SI Value Assessment Method>
    According to the skin sensitization test based on the LLNA (Local Lymph Node Assay), the SI value was measured as described below. [Test Material] <<Positive Control»
    α-Hexylcinnamaldehyde (HCA; product of Wako Pure Chemical Industries, Ltd.) was used as the positive control. <<Vehicle»
    As a vehicle, a mixture containing acetone (product of Wako Pure Chemical Industries, Ltd.) and olive oil (product of Fudimi Pharmaceutical Co., Ltd.) in a volume ratio of 4/1 was used. <<Used animals»
    Before being treated with the test substances, the positive control or the vehicle control, female mice were acclimated for 8 days including a 6-day quarantine. No abnormalities were found in all 15 mice (animals used) during the quarantine/acclimatization period.
    Based on the body weights measured 2 days before the start of sensitization, they were categorized into 2 groups (4 mice/group) by the body weight stratified random sampling method such that each individual's body weight was within ± 20% of the average body weight of all individuals. Each of the animals used was from 8 weeks of age to 9 weeks of age at the time of initiation of sensitization. Individuals who remain after categorization were excluded from the test.
    The animals used were individually identified by applying oil paint to their tails during the test period, and also their cages were labeled for identification. «Accommodation environment»
    During the housing period which includes the quarantine/acclimatization period, the animals used were housed in an animal environment with a barrier system, which was defined as follows: 21°C to 25°C in temperature, 40% to 70 % in relative humidity, 10 times/hour up to 15 times/hour in air circulation frequency, and a 12-hour lighting cycle interval (lighting from 7:00 to 19:00).
    The housing cages used were those made of polycarbonate, and four animals were housed in each cage.
    The animals used were given solid food ad libitum to MF laboratory animals (product of Oriental Yeast Co., Ltd.). Further, using a water supply bottle, the animals used were given tap water ad libitum in which sodium hypochlorite (PURELOX, product of OYALOX Co., Ltd.) was added so that the chlorine concentration was about 5 ppm. The bed used was SUNFLAKE (fir, wood chips obtained with a power planer) (product of Charles River Inc.). Feed 5 and all feeding equipment were sterilized with an autoclave (121°C, 30 min) prior to use.
    The housing cage and bed were replaced with new ones at the time of categorization and removal of the auricular lymph node (ie, the time when the 10 animals were transferred from the animal environment), and a bottle of water supply and support were replaced by new ones at the time of categorization. [Test Method]
    Group Composition
    The group compositions of the vehicle control group and the positive control group used for the measurement of the SI value are shown in Table 1. Table 1

    In Table 1, "25.0% HCA" denotes the vehicle which contains 25.0% HCA by mass. [Preparation] <<Test Substance>>
    Table 2 shows the amount of test substance.
    The test substance was weighed into a measuring flask, and the volume of the test substance was adjusted to 1 ml with the vehicle. The test substance preparation prepared in this way was placed in a light-shielded air-tight container (made of glass). Table 2
    <<Positive Control Substance»
    About 0.25 g of HCA was accurately weighed, and the vehicle was added to the HCA to have the volume of 1 ml, to thereby prepare a 25.0% by mass solution. The positive control substance preparation thus prepared was positioned in a light-shielded air-tight container (made of glass). «BrdU»
    Into a measuring vial, 200 mg of 5-bromo-2'-deoxyuridine (BrdU, product of NACALAI TESQUE, INC.) was accurately weighed into a measuring vial. Then, physiological saline solution (product of OTSUKA PHARMACEUTICAL CO., LTD.) was added to the measuring flask, and dissolved by applying ultrasonic waves. Next, the volume of the resulting solution was adjusted to 20 ml to prepare a 10 mg/ml solution (BrdU preparation). The BrdU preparation was sterilized through a sterile filtration filter and placed in a sterile container. <<Preparation Day and Storage Period»
    The positive control preparation was prepared the day before the start of sensitization, and stored in a cool place except in use. Vehicle and test substance preparations were prepared on the day of sensitization. The BrdU preparation was prepared 2 days before administration and stored in a cold place until the day of administration. [BrdU Awareness and Management] <<Awareness»
    Each (25 µL) of the test substance preparations, the positive control preparation, or the vehicle was applied to both ear of each of the animals used using a micropipette. This treatment was performed once a day for three consecutive days. <<BrdU Administration»
    About 48 hours after the final sensitization, the BrdU preparation (0.5 ml) was administered intraperitoneally once to each of the animals used. [Observation and Examination] <<General Conditions>>
    All animals used for the test were observed once or more times a day from the day of initiation of sensitization until the day of auricular lymph node removal (i.e., the day when animals were transferred from the animal environment) . Notably, the day of observation was counted from the day of the start of sensitization being considered as Day 1. <<Body Weight Measurement>>
    The body weight of each of the animals used was measured on the day of initiation of sensitization and on the day of atrial lymph node removal (i.e., the day when the animals were transferred from the animal environment). Also, the mean of the body weights and their standard error were calculated for each group. «Auricular Lymph Node Removal and Measurement of Its Weight»
    About 24 hours after BrdU administration, the animals used were allowed to undergo euthanasia, and their auricular lymph nodes were sampled. The tissue surrounding each auricular lymph node was removed, and the auricular lymph nodes from both ears were collectively weighed. Furthermore, the mean weights of the auricular lymph nodes and their standard error were calculated for each group. After measuring the weights, each individual's ear lymph nodes were stored in a frozen state using a BIOMEDICAL FREEZER set to -20°C. <<BrdU Admission Measurement»
    After returning the auricular lymph nodes to room temperature, the auricular lymph nodes were minced with the gradual addition of physiological saline solution, and suspended in it. The suspension thus obtained was filtered and then dispersed in the wells of a 96-well microplate, with 3 wells being used per individual. Suspensions dispersed in this way were measured for BrdU admission by the ELISA method. Reagents used were those from a commercially available kit (Cell Proliferation ELISA, BrdU colorimetric, Cat. No. 1647229, product of Roche Diagnostics Inc.). A multi-reader (FLUOSTAR OPTIMA, product of BMG LABTECH Inc.) was used to measure the absorbance of each well (OD: 370 nm to 492 nm, BrdU admission), and the mean absorbance of the 3 wells for each individual was used as the measurement of BrdU for the individual. [Evaluation of Results] «Calculation of the Stimulus Index (SI)»
    As shown in the following formula, the BrdU intake measurement for each subject was divided by the mean of the BrdU intake measurements in the vehicle control group to calculate the SI value for the subject. The SI value of each test group was the mean of the individuals' SI values. In addition, the standard error of the SI values was calculated for each test group. Notably, the SI value has been rounded to the second decimal place and shown to the first decimal place.
    (Examples 1 to 37, Comparative Examples 1 to 2)
    The following materials (A) to (F) were mixed with a mixing ratio (one unit to the value was parts by mass) as represented in each column of the Examples and Comparative Examples of Tables 3 to 6, to thereby obtain a ink. (A) t-butyl methacrylate, n-pentyl methacrylate, and n-hexyl methacrylate which are skin sensitizing negative monomers (B) glycerol dimethacrylate which is a negative skin sensitizing monomer (C) tricyclodecane dimethanol dimethacrylate which is a monomer negative for skin sensitization (D) isostearyl acrylate, stearyl methacrylate, and ethylene oxide modified phenol acrylate which are negative monomers for skin sensitization (E) a photoradical polymerization initiator negative for skin sensitization (F) a polymer or a copolymer of styrene, styrene derivative, acrylic acid ester, or acrylic acid, or any combination thereof.
    In Tables 3 to 6, the details of A1 to A3, B, C, D1 to D3, E1 to E3, and F1 to F4 are as follows. The value in parentheses at the end is an "SI" value as measured by the LLNA test described in the skin sensitization assessment above (1) . In addition, the description "negative" or "no" in parentheses at the end means that the product is assessed as "skin sensitizing negative" or "no skin sensitization" in the MSDS (Material Safety Data Sheet) described in the skin sensitization assessment above (2).
    The SI value valuation method is as described above. Al: t-butyl methacrylate, "Acryl Ester TB" manufactured by Mitsubishi Rayon Co., Ltd., (negative), literature review (test method: maximization test) A2: n-pentyl methacrylate, "n-Amyl methacrylate " manufactured by Toyo Science Corporation, (negative), literature review (test method: maximization test) A3: n-hexyl methacrylate, "n-Hexyl methacrylate" manufactured by Tokyo Chemical Industry Co., Ltd., (negative) , literature review (test method: maximization test) B: glycerol dimethacrylate, "701" manufactured by Shin-Nakamura Chemical Co., Ltd., (1.2) C: tricyclodecane dimethanol dimethacrylate, "DCP" manufactured by Shin-Nakamura Chemical Co., Ltd., (1.3) D1: isostearyl acrylate, "S1800A" manufactured by Shin-Nakamura Chemical Co., Ltd., (1.4) D2: stearyl methacrylate, "S" manufactured by Shin-Nakamura Chemical Co., Ltd., (1.2) D3: ethylene oxide-modified phenol acrylate, "M120" manufactured by Toagosei Chemical CO., LTD., (0.7) El: 1-hydroxy-cyclohexylphen il ketone, (no), evaluated on MSDS (test method: OECD test guideline 406) E2: 2-dimethylamino-2-(4-methylbenzyl)-1-(4-morpholin-4-yl-phenyl) butan-l-one, (no), evaluated on MSDS (test method: OECD test guideline 406) E3: 2,4-diethylthioxanthone (1.4), and 2-ethylhexyl p-dimethylaminobenzoate, (no) evaluated in MSDS (test method: OECD test guideline 406) Fl: styrene-acrylic acid copolymer -α- 5 methylstyrene, having an acid value of 108 mg KOH/g and mass average molecular weight of 4,600 F2: Styrene - acrylic acid -α- methylstyrene copolymer having an acid value of 53 mg KOH/g and weight average molecular weight 8,100 10 F3: Polystyrene having weight average molecular weight 4,400 F4: Polymethyl methacrylate having weight average molecular weight mass of 36,000
    Each paint was evaluated for viscosity (mPa’s) at 25°C and adhesion of the cured coating film to the base. The results are shown in Tables 3 to 6.
    The viscosity of each paint was measured by a cone plate type rotary viscometer (manufactured by 20 TOKI SANGYO CO., LTD.) with the circulating water temperature being constantly set to 25°C. The 25°C temperature is the adjusted temperature considering the typical ambient temperature.
    As for evaluating the adhesion of the cured coating film of each paint to the base, a commercially available polypropylene film (P2161, manufactured by TOYOBO CO., LTD., thickness: 60 μm) and polyethylene terephthalate film (E5100, manufactured by TOYOBO 5 CO., LTD., thickness: 100 μm) were used as a general film material widely used as a winding material or industrial material. After ejection of the ink onto a corona treated surface of any of these films, light was applied from an LH6 UV irradiation device (manufactured by Fusion Systems Japan Co., Ltd.) to cure the ink to prepare an solid coating film. Adhesion of the solid coating film was evaluated by a cross-cut method specified in JIS-K-5600-5-6. The case where paint peeling was not observed and the case where only slight peeling was observed in the cross section of the cut were rated as "A," the case where paint peeling was slightly observed and the case where a peeling was observed only in the cross section of the cut, 20 were rated as "B", and the case where paint peeling was clearly observed was rated as "C".
    Specifically, an aluminum pouch bag having a shape illustrated in FIG. 1 was loaded with each paint, and hermetically sealed to prevent the inclusion of air bubbles. The hermetically sealed bag bag containing the ink was housed in a plastic cartridge as illustrated in FIG. 2. This cartridge has been mounted in a housing adapted for its housing. In the housing, an ink flow channel was provided from the cartridge to a GEN4 head (product of Ricoh Printing Systems, Ltd.). The ink was blasted through an ink flow channel to form a solid coating film at the base. Note that, the ink droplet jet amount was adjusted so that the solid coating film thickness was to be about 10 µm.
    The solid printed coating film was cured by means of the LH6 UV irradiation device under the light dose conditions of 0.2 (mW/cm2) and 400 (mJ/cm2), and the resultant was provided for the evaluation of accession. Table 3-1
    Table 3-2
    Table 4
    Table 5-1

    Table 5-2
    Table 6-1

    Table 6-2
    *1: Carbon black containing carbon black "#10" manufactured by Mitsubishi Chemical Corporation and a dispersing agent "Solsperse39000" manufactured by Lubrizol Japan Co., with a mass ratio of 3/1.
    It can be confirmed from the Examples that the monomer components need to contain at least t-butyl methacrylate, n-pentyl methacrylate or n-hexyl methacrylate, or any combinations thereof to provide an inkjet ink having no ink sensitization problem. skin, and a sufficiently low viscosity so as not to cause any problem with ink blasting. Note that the use of n-butyl methacrylate, which has a similar molecular structure to the structures of the monomers mentioned above, as the monomer component caused a skin sensitization problem, although there was no problem in ink blasting.
    As seen from the results of Examples 1 to 4, excellent adhesion to the polypropylene film or polyethylene terephthalate film can be achieved by using the monomers of (A) and (B) in combination as the monomer components. However, there was one case that excellent adhesion to the polyethylene terephthalate film could not be obtained depending on the amount of polymer component (F). In this way, it is necessary to properly adjust the amount of the polymer component (F) considering various physical properties of the paint or coating film as required, as well as adhesion.
    Furthermore, the viscosity increases while the amount of polymer component (F) increases. In this way, the amount of the same needs to be adjusted to give a viscosity that is within the range with which the ink can be ejected, considering an ejection head utilization, ejection force of the same, or heating specifications.
    As in Comparative Example 1, on the other hand, sufficient adhesion could not be obtained when the polymer component (F) was not contained.
    As seen from the results of Examples 3 and 5, the paint viscosity could be controlled with maintaining adhesion by controlling the mixing ratio of (A) and (B). As the viscosity required for the ink varies depending on the properties of an ejection head, the viscosity of the ejection head can be adjusted appropriately depending on such circumstances.
    As seen from the results of Examples 6 to 13, excellent adhesion can similarly be achieved by using the different polymer component. However, there was also a case where excellent adhesion to polyethylene terephthalate film could not be achieved depending on a type or amount of polymer component. In this way, it is necessary to properly select a type or an amount of polymer component (polymer or copolymer) considering various physical properties of the paint or coating film as required as well as adhesion. As seen especially from the results of Examples 11 to 13, it was possible to lower the viscosity of the paint by adjusting the mixing ratio of the monomer component. As a result, the polymer component of a large molecular weight can also be contained in a required amount.
    As seen from the results of Examples 1 and 14, coating film strength, as well as adhesion, can be improved by adjusting the mixing ratio of the monomer components (A) and (B), and using the monomer component (C) in combination. As seen from the results of Comparative Example 2, on the other hand, sufficient adhesion could not be achieved when the monomer component (B) was not contained. In order to avoid variations in the pencil hardness results of the coating films due to superior or inferior adhesion, the scratch hardness of the coating film was evaluated in the following manner. A coating film was formed on a commercially available polyethylene terephthalate film (COSMOSHINE A4300, manufactured by TOYOBO CO., LTD.; thickness: 188 µm), on a surface of which an adhesion assist layer was provided in advance, under the same conditions as described above, and the scratch hardness of the resulting coating film was evaluated according to a pencil method specified in JIS-K-5600-5-4. Pencil hardness is determined as H, and F in that order from the hardest.
    As seen from the results of Examples 15 to 26, the flexibility of the coating film can be improved by adding the monomer component (D) to the paint. Based on this, the amount of the monomer component can be appropriately adjusted considering various physical properties of the paint or coating film as required, as well as adhesion or flexibility. Note that the "flexibility of the coating film" mentioned here was evaluated by mixing the coating film formed into the polypropylene film in the aforementioned manner, along with the base, in and out until a bending line appears, and observe visually whether the coating film can match the folding movements or not. "B" indicates that a crack has formed in the coating film, and "A" indicates that no crack has formed in the coating film.
    As seen from the results of Examples 1 and 27 to 29, excellent adhesion could be achieved even when one type of the monomer of (A) was changed. In this way, the Al to A3 monomers can be selected appropriately considering various physical properties of the paint or coating film as required, as well as adhesion.
    As seen from the results of Examples 1, 30, and 31, excellent adhesion can be achieved even when a type of polymerization initiator of (E) for use has been changed. In this way, polymerization initiators E1 to E3 can be selected appropriately considering various physical properties of the paint or coating film as required, as well as adhesion.
    As seen from the results of Examples 32 to 37, excellent adhesion can be achieved even when the ink contains a dye. Note that F4 polymer is a polymer which greatly increases the viscosity of an ink as contained, compared to other polymers. As in Example 37, however, the viscosity of the ink can be reduced to the range with which the ink can be ejected, by adjusting the mixing ratio of the monomer component. As in Examples 33 to 37, moreover, excellent adhesion similarly could be achieved even when the different polymer component was used. However, there is a case where excellent adhesion to polyethylene terephthalate film cannot be achieved depending on a type or an amount of polymer component. In this way, it is necessary to properly select a type or amount of polymer component considering various physical properties of the paint or coating film as required, as well as adhesion.
    Note that, in all Examples, the coating films after light application were cured excellently without sticking, as confirmed by finger touch.
    The embodiments of the present invention are as follows: < 1> A light-curing inkjet ink, which contains: monomer components; and a styrene polymer or copolymer, derived from styrene, acrylic acid ester, or acrylic acid, or any combination thereof, wherein the monomer components contain: t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination thereof; and glycerol dimethacrylate, and wherein the photopolymerizable inkjet ink is free of a diluting solvent. <2> The light-curing inkjet ink according to <1>, wherein an amount of the polymer or copolymer is 5 parts by mass to 20 parts by mass with respect to 100 parts by mass of the monomer components. < 3> The light-curing inkjet ink according to any one of <1> or <2>, wherein an amount of t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination of the same in 100 parts by mass of the monomer components is 20 parts by mass to 85 parts by mass. <4> The light-curing inkjet ink according to any one of <1> to <3>, wherein the amount of glycerol dimethacrylate in 100 parts by mass of the monomer components is 10 parts by mass to 60 parts by mass . <5> The light-curing inkjet ink according to any one of <1> to <4>, wherein the monomer components additionally contain tricyclodecane dimethanol dimethacrylate. <6> The photopolymerizable inkjet ink according to any one of <1> to <5>, wherein the monomer components additionally contain isostearyl acrylate, stearyl methacrylate, or ethylene oxide modified phenol acrylate, or any combination of them. < 7> An ink cartridge, which contains: the light-curing inkjet ink according to any one of <1> to <β>; and a container. <8> An inkjet printing device, which contains: the ink cartridge according to <7>.
    权利要求:
    Claims (8)
    [0001]
    1. Light-curing inkjet ink characterized by the fact that it comprises: monomer components; and a polymer or copolymer of styrene, derived from styrene, acrylic acid ester, or acrylic acid, or any combination thereof, wherein the monomer components comprise: t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination thereof; and glycerol dimethacrylate, and wherein the photopolymerizable inkjet ink is free of a diluting solvent.
    [0002]
    2. Light-curing inkjet ink according to claim 1, characterized in that an amount of the polymer or copolymer is 5 parts by mass to 20 parts by mass in relation to 100 parts by mass of the monomer components.
    [0003]
    3. Light-curing inkjet ink according to any one of claims 1 or 2, characterized in that an amount of t-butyl methacrylate, n-pentyl methacrylate, or n-hexyl methacrylate, or any combination of the same in 100 parts by mass of the monomer components is 20 parts by mass to 85 parts by mass.
    [0004]
    4. Light-curing inkjet ink according to any one of claims 1 to 3, characterized in that the amount of glycerol dimethacrylate in 100 parts by mass of the monomer components is 10 parts by mass to 60 parts by mass.
    [0005]
    5. Light-curing inkjet ink according to any one of claims 1 to 4, characterized in that the monomer components additionally comprise tricyclodecane dimethanol dimethacrylate.
    [0006]
    6. Photopolymerizable inkjet ink according to any one of claims 1 to 5, characterized in that the monomer components additionally comprise isostearyl acrylate, stearyl methacrylate, or ethylene oxide-modified phenol acrylate, or any combination of the same.
    [0007]
    7. Ink cartridge characterized in that it comprises: a light-curing inkjet ink as defined in any one of claims 1 to 6; and a container.
    [0008]
    8. Inkjet printing device, characterized in that it comprises: printing units (3a, 3b, 3c and 3d), each comprising a heating system and a cooling system, a printing base (2) , a print base feed roller (1), UV light sources (4a, 4b, 4c and 4d), a processing unit (5), and a winding roller for printed products, in which the printing device The inkjet printer further comprises the ink cartridge as defined in claim 7.
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    同族专利:
    公开号 | 公开日
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    法律状态:
    2015-10-20| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-20| B06I| Publication of requirement cancelled [chapter 6.9 patent gazette]|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |
    2019-08-13| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-02| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-04-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-22| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 31/05/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2012124057A|JP5994393B2|2012-05-31|2012-05-31|Photopolymerizable inkjet ink, ink cartridge, inkjet printing apparatus|
    JP2012-124057|2012-05-31|
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