• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Procedure for the manufacture of a digital inkjet type ink and digital inkjet type ink obtained. It comprises the following phases: a first phase in which a pigmentary paste is manufactured; a second phase of premolturation; a third grinding phase; a fourth phase in which the pigment paste is transformed into ink by diluting it into a mixture of low migration monomers, oligomers, additives and photoinitiators. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2632992A1
    申请号:ES201630308
    申请日:2016-03-15
    公开日:2017-09-18
    发明作者:Juan Carlos FERNÁNDEZ LÓPEZ；Armand MARCÉ TORRA
    申请人:Chimigraf Iberica SL；
    IPC主号:
    专利说明:

    image 1 DESCRIPTION
    Procedure for manufacturing a digital inkjet ink and digital inkjet ink obtained.
    5 Procedure for the manufacture of a digital printing ink and digital inkjet ink obtained, of the type comprising the following phases: a first phase in which a pigment paste is manufactured with the following components and proportions: - between 1 % and 15% of at least one pigment, - between 1% and 30% of at least one oligomer,
    10 - between 0.5% and 10% of at least one dispersant, - between 0.1% and 5% of additives and, - between 40% and 97% of a mixture of oligomers, monomers and / or resins of different nature; a second premolturation phase, in which the pigment paste of the first phase is subjected to a premolturization process, said pigment paste passing through an immersion mill and a cooling circuit until reaching a
    15 particle size less than 3 microns; a third grinding phase in which the pigment paste of the second phase, with a particle size of less than 3 microns in which it is passed through the said cooling circuit and subsequently passed through a ball mill until the pigment in the pigment paste obtains the desired particle size; a fourth phase in which the pigment paste is transformed into ink
    20 diluting this in a mixture of low migration monomers, oligomers, additives and photoinitiators. BACKGROUND OF THE INVENTION
    Different patents are known in the state of the art that refer to digital inkjet printing inks.
    Thus, Spanish Patent No. 201330751 (ES2523397) "COMPOSITION FOR INJECTION PRINTING" is known, in the name of Fundació CETEMMSA, of the year 2013, which refers to a composition for printing by injection, wherein the composition of the invention comprises : (a) polyethylene glycol with a molecular weight that is between 20,000 (20K) and 50,000 (50K), in a concentration between 0.5 and 15% by weight / volume; (b) a nonionic surfactant of the general formula (I) where n is between 5 and 40, and said surfactant said surfactant being in a concentration between 0.1 and 1.0% by volume / volume; and (c) one or more ingredients
    image2
    selected from a liquid vehicle, a binder and an additive suitable for printing. The composition of the invention is used in the printing of molecules with a biological interest.
    5 European Patent No. 2451648 “HIGH VISCOSITY THERMOSENSIBLE INK PRINTING PROCESS” is also known, in the name of SAWGRASS TECHNOLOGIES, INC, of the year 2010, which refers to a method of printing a design using an inkjet printer. ink using heat activatable dye solids, which includes the steps of: preparing a liquid ink suitable for use in a
    An inkjet printer using liquid ink, said liquid ink comprises water, particles of heat-activatable dye solids and a viscosity control agent, wherein the liquid ink has a viscosity not less than 6.0 mPa.s (centipoise), where heat activatable dye solids are sparingly soluble in the viscosity control agent; inkjet printer power printing
    15 liquid ink with said liquid ink; printing said liquid ink on a desired image by said inkjet printer on a substrate to form an image, where the particles of the heat-activatable dye solids are solid at the time of printing; and heat activation of heat activatable dye solids, where, after heat activation, the image has a non-optical density
    20 less than 1.25 when measured by an X-Rite densitometer, characterized in that the viscosity control agent comprises not less than 15% by weight of the liquid ink and not less than 95% of the particles of heat activated dye solids have a diameter of 0.05 microns or greater.
    25 European Patent No. 2206753 "IMPROVED INK WHITE INJECTION INK FOR STABILITY OF DISPERSION", in the name of AGFA GRAPHICS NV, of 2007, which refers to an ink cartridge of color jet injection comprising a white ink containing a pigment with a refractive index greater than 1, 60 and at least one ink of
    30 color jet injection characterized by the fact that the viscosity of the white jet ink is at least 4 mPa.s higher than the viscosity of the color inkjet ink at which the viscosity is measured at 40 ° C with a Brookfield DVII + Pro at 12 rotations per minute, and which is further characterized by the fact that white ink contains at least 26% by weight of a white pigment in relation to weight
    35 total white ink.
    image3
    European Patent No. 1557448 "PROCESS OF GRINDING IN WET USING MICROPERLAS", of the year 2005, in the name of DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., Which refers to a process of producing an ink for inkjet registration comprising an aqueous pigment dispersion and further comprising at least one additive selected from the group consisting of film-forming polymers, agents crosslinking agents, film-forming adjuvants, pH adjusting agents, surfactants, ejector drying inhibitors, thickeners, defoaming agents, preservatives, mold and antibiotics, comprising (A) finely dispersing a pigment in a mixture of pigment dispersion obtained by mixing of at least one pigment and a dispersant in an aqueous medium with beads having diameters of 0.5 mm to 2 mm, such that said pigment is formed into fine particles having an average particle size of 100 nm to 500 nm; and (B) ultrafine dispersion of the pigment dispersion mixture obtained in step (A) with microbeads having diameters not less than 0.02 mm but less than 0.2 mm, wherein said pigment dispersion mixture it is dispersed ultrafine in an annular mill to produce the aqueous pigment dispersion, in which said ultrafine dispersion is performed to satisfy the following inequality (1): 0.005 <L / X <0.01 (1) in which L it is an effective mill capacity in liters of said annular mill and X is a flow rate in liters of said pigment dispersion mixture per hour through the annular mill.
    Finally, it is worth noting the patent WO2014126720 "UV COVERABLE INKS WITH LOW MIGRATION", of 2014, in the name of SUN CHEMICHAL CORP et al., Which refers to a pigmented liquid composition for inkjet printers that has a radical free with ultraviolet curing, for printing on food packaging materials, which when cured in the air at room temperature, produces minimal contamination of food products. This composition uses non-polymeric photoinitiators that have a molecular weight of less than 500 amu that migrate to levels below the specified SML (specific migration limit
    BRIEF DESCRIPTION OF THE INVENTION
    The present invention is part of the sector of digital printing inks, inkjet.
    image4
    The closest document is European Patent No. 1557448. It describes a process for wet grinding based on ball mills.
    Ball mills in the inks sector have been known for a long time, in fact CHIMIGRAF has been using them since before 2004.
    Said patent solves the problem of how to store aqueous inks and also reduce the particle size of the pigment for storage.
    The problem of said patent is that when said ink is applied on a head it is done by means of a spray which results in the quality of the printed work.
    Likewise, if it is a question of doing a work of greater detail, the drop is not deposited perfectly, but it is a succession of small drops of different size, that the head touches them and has to be cleaned continuously.
    Patent WO2014126720 also deserves to be highlighted. This patent uses difunctional monomers as reagents (DPGDA) which makes it have a low viscosity but on the contrary, it would not comply with the Nestlé Standard. It also uses a synergistic amine (CN3715LM) as a photoinitiator, which can cause odor problems due to the ammoniacal odors that come off when the ink is cured.
    In the present invention, to improve the quality of the product, it is obvious that it is an aqueous ink, so there is no fear that the ink will not deposit correctly on the support.
    It can also be used in high-speed printers, the result being also of excellent quality.
    This also allows you to be able, without any fear, to be used in the food sector, after a migration test on the specific substrate and the curing conditions of the printer.
    image5
    Finally, the pigment concentrate is lower, contrary to what happens in the background of the invention, and this is achieved thanks to the oligomer that is used to reduce the particle size of the pigment in a more efficient manner.
    The present invention presents a mixture of monomers and oligomers. The oligomers have great reactivity in the ink, such that they polymerize 100% when cured. On the contrary, due to the high viscosity the inventor has used monomers to dilute the ink and thereby reduce the viscosity of the oligomer. The monomer also improves the adhesion of the ink to the support.
    10 Resins are also used because they improve the formation of the ink drop, which is vital in a single-pass model printer, which are high-speed printers. Therefore, it is necessary that the ink drop has a great consistency and does not break, something that is achieved by combining with the resin of the present invention. If another additive is used, the
    15 drops of ink could break and not be deposited exactly on paper.
    An object of the present invention is a process for the manufacture of a digital printing ink, of the type comprising the following phases: a first phase in which a pigment paste is manufactured with the following components and proportions: - between 1% 20 and 15% of at least one pigment, - between 1% and 30% of at least one oligomer, - between 0.5% and 10% of at least one dispersant, - between 0.1% and 5% of additives and, - between 40% and 97% of a mixture of oligomers, monomers and / or resins of different nature; a second premolturation phase, in which the pigment paste of the first phase is subjected to a premolturization process, said pigment paste passing through an immersion mill and a cooling circuit until a particle size of less than 3 microns is reached; a third grinding phase in which the pigment paste of the second phase, with a particle size of less than 3 microns in which it is passed through the said cooling circuit and subsequently passed through a ball mill until the pigment in the pigment paste gets the size of
    30 desired particle; a fourth phase in which the pigment paste is transformed into ink by diluting it in a mixture of low migration monomers, oligomers, additives and photoinitiators.
    An additional object of the present invention is an ink obtained according to the above procedure characterized in that it comprises: - between 1% and 10% pigment, between 5% and 20% of oligomers, between 0.5% and 7% of resins of vinyl or acrylic type, between 55 and 80% of monomers of monofunctional and / or, difunctional and / or trifunctional type, between 8% and 20% of low-migration photoinitiators, between 0.1 and 5% of additives among which are TS modifiers, polymerization inhibitors, and between 1% and 7% dispersant additives, resulting in an ink with a viscosity between 20 and 28 cP at 25 ° C, between 9.5 and 15 cP between 35-40 ° C and 10.5-12 cP at 45 ° C, the surface tension between 25 and 35 dynes / cm being included and the particle size of all colors should be below 1 micron.
    image6 CONCRETE REALIZATION OF THIS INVENTION
    In advance, it should be noted that the% are by weight and over the total both in the description and in the claims.
    Thus, in a specific embodiment, the process for manufacturing a digital printing ink, characterized in that it comprises the following phases:
    A first phase in which a pigment paste is manufactured with the following components and proportions: between 1% and 15% of at least one pigment, between 1% and 30% of at least one oligomer, between 0.5% and 10% of at least one dispersant, between 0.1% and 5% of additives and, between 40% and 97% of a mixture of oligomers, monomers and resins of different nature.
    This paste is taken to a second phase in which they will perform a premolturation on it. For this, the first phase pigment paste is passed through an immersion mill and also through a cooling circuit until a particle size of less than 3 microns is reached.
    The advantage of this type of mill is that when the pigment paste is removed from the basket, said pigment paste already begins to cool down, requiring that the paste be less time in the refrigeration circuit.
    In the third phase of grinding, the pigment paste of the second phase, which has a particle size of less than 3 microns, is passed through a cooling circuit and subsequently passed through a ball mill until the pigment of the Pigment paste obtains the desired particle size.
    image7
    Since the pigment paste has a low viscosity, it is ideal to use a 5-ball mill, which has the advantage of more grinding time, further increases its dispersing action and that there is also no loss of volatile material during said phase.
    Finally, in the fourth phase, the pigment paste is transformed into ink by diluting it in a mixture of low migration monomers, oligomers, additives and photoinitiators.
    Optionally, a fifth phase can be provided in which the pigment paste of the fourth phase is passed through a filter, which will retain all the paste that does not have a desired particle size.
    15 The ink obtained according to the above procedure comprises:
    -between 1% and 10% pigment,
    -  between 5% and 20% oligomers,
    -  between 0.5% and 7% of vinyl or acrylic type resins,
    20 - between 55 and 80% of monomers of monofunctional and / or difunctional and / or trifunctional type,
    -  between 8% and 20% of low migration photoinitiators,
    -  between 0.1 and 5% of additives among which are modifiers of TS,
    25 polymerization inhibitors - between 1% and 7% dispersant additives,
    This results in an ink with a viscosity between 20 and 28 cP at 25 ° C, between 9.5 and 15 cP between 35-40 ° C and 10.5-12 cP at 45 ° C, the surface tension between 25 and 35 dynes / cm being comprised and the particle size of all colors should be below 1
    30 microns
    As indicated, this ink has the advantage that it meets the parameters of the Nestle Standard, since the ink does not migrate, so that said ink is used on food packaging, said ink would not contaminate the food inside the package .
    35


    For this, oligomers are used that have a high reactivity in the ink, such that they polymerize 100% when cured. Therefore, said oligomers do not contaminate because they polymerize when cured, applying UV rays on them.
    But such oligomers increase the viscosity, so they would hinder the use of ball mills. To solve this problem, monomers are added to dilute the ink and thereby reduce the viscosity of the oligomer. Another advantage of the monomer is that it improves the adhesion of the ink to the support.
    Another important component is the use of resins. The present inks can be used in high speed printers, called "single-pass". This allows printing in a single pass, which saves a lot of time.
    To achieve this, the inventor has verified that using resins improves the formation of the ink drop.
    With the use of resins it is achieved that the ink drop has a great consistency and does not break. If another additive was used, the ink drop could break and would not deposit exactly on the paper, soiling both the support and the printhead itself.
    Optionally, to facilitate dispersion, it is configured that the particle size of the colors is less than 250 nm.
    When it comes to black pigment the particle size can be less than 150 nm.
    The following are a series of formulation examples, with a blue, black, pink and yellow ink.
    EXAMPLE 1 (BLACK INK)
    Component % by weight of the total
    Type 1 photonitiator 2.5
    Type 2 photoinitiator 5
    Type 3 photoinitiator 4
    image8
    Oligomer  5
    Pigment 5.0
    Dispersant  2.9
    Differential Monomer 40
    Monofunctional Monomer 30.6
    Resin 4
    Additives one
    EXAMPLE 2 (BLACK INK)
    Component % by weight of the total
    Type 1 photonitiator 5
    Type 2 photoinitiator 10
    Type 3 photoinitiator 2
    Oligomer  10
    Pigment 4,5
    Dispersant  2.6
    Differential Monomer 30
    Monofunctional Monomer 32.9
    Resin 2
    Additives one
    EXAMPLE 3 (BLACK INK)
    Component % by weight of the total
    Type 1 photonitiator 3
    Type 2 photoinitiator 6
    Type 3 photoinitiator 4
    Oligomer  5
    Pigment 5.0
    Dispersant  2.9
    Differential Monomer 40
    Monofunctional Monomer 30.1
    Resin 3
    image9
    Additives one
    EXAMPLE 4 (BLUE INK)
    Component % by weight of the total
    Type 1 photonitiator 3
    Type 2 photoinitiator 6
    Type 3 photoinitiator 4
    Oligomer  5
    Pigment 5.0
    Dispersant  2.9
    Differential Monomer 40
    Monofunctional Monomer 30.1
    Resin 3
    Additives one
    EXAMPLE 5 (BLUE INK)
    Component % by weight of the total
    Type 1 photonitiator 4
    Type 2 photoinitiator 8
    Type 3 photoinitiator 2
    Oligomer  10
    Pigment 4,5
    Dispersant  2.6
    Differential Monomer 30
    Monofunctional Monomer 36.4
    Resin 1.5
    Additives one
    EXAMPLE 6 (BLUE INK)
    Component % by weight of the total
    Type 1 photonitiator one


    Type 2 photoinitiator 10
    Type 3 photoinitiator 1.5
    Oligomer  fifteen
    Pigment 4.0
    Dispersant  2.3
    Differential Monomer 10
    Monofunctional Monomer 54.2
    Resin one
    Additives one
    EXAMPLE 7 (YELLOW INK)
    Component % by weight of the total
    Type 1 photonitiator 2.5
    Type 2 photoinitiator 5
    Type 3 photoinitiator 3
    Oligomer  5
    Pigment 5.0
    Dispersant  3.3
    Differential Monomer 38
    Monofunctional Monomer 34.7
    Resin 2.5
    Additives one
    EXAMPLE 8 (YELLOW INK)
    Component % by weight of the total
    Type 1 photonitiator 3
    Type 2 photoinitiator 4
    Type 3 photoinitiator 3.5
    Oligomer  10
    Pigment 4,5
    Dispersant  3.0
    Differential Monomer 29
    image10
    Monofunctional Monomer 40.0
    Resin 2
    Additives one
    EXAMPLE 9 (YELLOW INK)
    Component % by weight of the total
    Type 1 photonitiator 4
    Type 2 photoinitiator 2
    Type 3 photoinitiator 4
    Oligomer  fifteen
    Pigment 4.0
    Dispersant  2.6
    Differential Monomer eleven
    Monofunctional Monomer 55.4
    Resin one
    Additives one
    EXAMPLE 10 (PINK INK)
    Component % by weight of the total
    Type 1 photonitiator 3
    Type 2 photoinitiator 4
    Type 3 photoinitiator 4
    Oligomer  5
    Pigment 6.0
    Dispersant  5.4
    Differential Monomer 35.0
    Monofunctional Monomer 33.1
    Resin 3.5
    Additives one
    EXAMPLE 11 (PINK INK)
    image11
    Component % by weight of the total
    Type 1 photonitiator 5
    Type 2 photoinitiator 2.5
    Type 3 photoinitiator 3
    Oligomer  10
    Pigment 5.5
    Dispersant  5.0
    Differential Monomer 31
    Monofunctional Monomer 35.0
    Resin 2
    Additives one
    EXAMPLE 12 (PINK INK)
    Component % by weight of the total
    Type 1 photonitiator 2.5
    Type 2 photoinitiator 4,5
    Type 3 photoinitiator 4
    Oligomer  fifteen
    Pigment 5.0
    Dispersant  4,5
    Differential Monomer 12
    Monofunctional Monomer 50.0
    Resin 1.5
    Additives one
    The present invention patent describes a new process for the manufacture of a digital inkjet ink and digital inkjet ink obtained. The examples mentioned herein are not limiting of the present invention, therefore it may have different applications and / or adaptations, all of them within the scope of the following claims.
    10
    权利要求:
    Claims (5)
    [1]
    image 1
    1. Procedure for the manufacture of a digital printing ink, characterized in that it comprises the following phases:
    a) a first phase in which a pigment paste is manufactured with the following components and proportions:
    -between 1% and 15% of at least one pigment,
    -  between 1% and 30% of at least one oligomer,
    -  between 0.5% and 10% of at least one dispersant,
    -between 0.1% and 5% of additives and,
    - between 40% and 97% of a mixture of oligomers, monomers and resins of different nature,
    b) a second premolturation phase, in which the pigment paste of the first phase is subjected to a premolturization process, said pigment paste passing through an immersion mill and a cooling circuit until a particle size of less than 3 microns is reached. ,
    c) a third grinding phase in which the pigment paste of the second phase, with a particle size of less than 3 microns in which it is passed through the said cooling circuit and subsequently passed through a ball mill until the pigment in the pigment paste obtains the desired particle size, and
    d) a fourth phase in which the pigment paste is transformed into ink by diluting it in a mixture of low migration monomers, oligomers, additives and photoinitiators.
    [2]
    2. Method, according to claim 1, characterized in that it comprises a fifth phase in which the ink obtained in the fourth phase is subjected to a filtering process.
    [3]
    3. Ink obtained according to the previous procedure characterized in that it comprises:
    fifteen
    image2
    -between 1% and 10% pigment,
    - between 5% and 20% of oligomers, 5 - between 0.5% and 7% of vinyl or acrylic resins,
    -  between 55 and 80% of monomers of monofunctional and / or difunctional and / or trifunctional type,
    -  between 8% and 20% of low migration photoinitiators,
    - between 0.1 and 5% of additives among which are TS modifiers, 10 polymerization inhibitors
    - between 1% and 7% dispersant additives,
    resulting in an ink with a viscosity between 20 and 28 cP at 25 ° C, between 9.5 and 15 cP between 35-40 ° C and 10.5-12 cP at 45 ° C, the surface tension between 25 and 35 dynes / cm being included and the Particle size of all colors should be below 1 micron.
    [4]
    4. Ink according to claim 3, characterized in that the particle size of
    The colors is less than 250 nm. twenty
    [5]
    5. Ink according to claim 4, characterized in that the particle size of the preferable black color is less than 150 nm.
    16
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    同族专利:
    公开号 | 公开日
    EP3431556A1|2019-01-23|
    US20190119518A1|2019-04-25|
    ES2632992B1|2018-06-08|
    WO2017158217A1|2017-09-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2008148901A1|2007-06-08|2008-12-11|Chimigraf Ibérica, Sl|Method for production of a digital printing ink and ink obtained|
    CA2638251A1|2007-07-27|2009-01-27|Seiren Co., Ltd.|Ink set for ink jet, ink jet coloring process and colored product for outdoor|
    WO2014041346A1|2012-09-11|2014-03-20|Sericol Limited|Printing ink|
    US20140125718A1|2012-11-02|2014-05-08|Electronics For Imaging, Inc.|A method and apparatus for controlling lightness in colored inkjet inks by means of a transparent white ink composition|
    WO2015140538A1|2014-03-17|2015-09-24|Fujifilm Speciality Ink Systems Limited|Printing ink|
    ES2215481B2|2003-03-24|2006-03-01|Chimigraf Iberica, S.L.|PROCEDURE FOR THE MANUFACTURE OF A DIGITAL PRINTING INK AND OBTAINED INK.|
    US7662224B2|2005-03-31|2010-02-16|Sloan Donald D|High elongation vacuum formable digital ink|
    法律状态:
    2018-04-03| PC2A| Transfer of patent|Owner name: KAO CORPORATION Effective date: 20180326 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201630308A|ES2632992B1|2016-03-15|2016-03-15|Procedure for manufacturing an inkjet digital printing ink and inkjet digital printing ink obtained|ES201630308A| ES2632992B1|2016-03-15|2016-03-15|Procedure for manufacturing an inkjet digital printing ink and inkjet digital printing ink obtained|
    PCT/ES2017/070136| WO2017158217A1|2016-03-15|2017-03-10|Method for producing a digital inkjet printing ink, and thus obtained digital inkjet printing ink|
    EP17722077.9A| EP3431556A1|2016-03-15|2017-03-10|Method for producing a digital inkjet printing ink, and thus obtained digital inkjet printing ink|
    US16/084,064| US20190119518A1|2016-03-15|2017-03-10|Procedure for the manufacture of a digital inkjet-type printing ink and digital printing ink thus obtained|
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