WO2020137067A1 - 光硬化型インキジェット印刷用インキ組成物 - Google Patents
光硬化型インキジェット印刷用インキ組成物 Download PDFInfo
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- WO2020137067A1 WO2020137067A1 PCT/JP2019/038724 JP2019038724W WO2020137067A1 WO 2020137067 A1 WO2020137067 A1 WO 2020137067A1 JP 2019038724 W JP2019038724 W JP 2019038724W WO 2020137067 A1 WO2020137067 A1 WO 2020137067A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
Definitions
- the present invention relates to an ink composition for photocurable ink jet printing. More specifically, the present invention is for photocurable ink jet printing, which can provide a printed matter having excellent adhesiveness to a polyolefin resin substrate such as polypropylene and having various physical properties such as abrasion resistance. It relates to an ink composition.
- Patent Document 1 discloses an active energy ray-curable inkjet ink containing a monofunctional monomer having a cyclic structure, a bifunctional monomer, and an organic solvent having a predetermined boiling point.
- Patent Documents 1 and 2 had room for improvement in adhesion and curability with respect to polyolefin-based substrates such as polypropylene. Further, printed materials obtained using the ink compositions described in these patent documents had room for improvement in abrasion resistance.
- the present invention has been made in view of such conventional problems, and shows excellent adhesiveness to a polyolefin resin substrate such as polypropylene, and obtains a printed matter having various physical properties such as abrasion resistance.
- An object of the present invention is to provide a photocurable ink composition for ink jet printing.
- An acrylated amine compound having two amino groups, a monofunctional monomer (D) (excluding the vinylamide monomer of the component (B)), and a photopolymerization initiator are used together in a predetermined amount,
- the present invention has been completed by finding that the above problems can be solved by maintaining the viscosity at or below a predetermined level.
- the photocurable ink jet printing ink composition which solves the above-mentioned problems, comprises (A) hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate and hydroxy. At least one selected from the group consisting of neopentyl glycol diacrylate pivalate, at least one of (B) vinylamide monomer and acryloylamine monomer, and (C) two photopolymerizable compounds in the molecule.
- An acrylated amine compound having a functional group and two amino groups, a monofunctional monomer (D) (excluding the vinylamide monomer of the component (B)), and a photopolymerization initiator The content of the component) is 40 to 70% by mass in the photocurable ink jet printing ink composition, and the content of the component (B) is 5 to 30 in the photocurable ink jet printing ink composition. % By weight, the content of the component (C) is 0.1 to 15% by weight in the photocurable ink composition for ink jet printing, and the viscosity at 25° C. is 200 mPa ⁇ s or less.
- a curable ink composition for ink jet printing The content of the component) is 40 to 70% by mass in the photocurable ink jet printing ink composition, and the content of the component (B) is 5 to 30 in the photocurable ink jet printing ink composition. % By weight, the content of the component (C) is 0.1 to 15% by weight in the photocurable ink composition for ink jet printing
- the photocurable ink jet printing ink composition of one embodiment of the present invention (hereinafter also referred to as ink composition) is (A) hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene. At least one member selected from the group consisting of glycol diacrylate and neopentyl glycol dihydroxypiparyl glycol diacrylate; (B) at least one of a vinylamide monomer and an acryloylamine monomer; and (C) 2 in the molecule.
- the content of the component (A) is 40 to 70% by mass in the photocurable ink for ink jet printing.
- the content of the component (B) is 5 to 30% by mass in the photocurable ink for ink jet printing.
- the content of the component (C) is 0.1 to 15 mass% in the photocurable ink composition for ink jet printing.
- the viscosity at 25° C. is 200 mPa ⁇ s or less.
- the ink composition of the present embodiment contains, as the component (A), hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, and neopentyl glycol diacrylate hydroxypiparate. At least one selected from by containing the component (A), the ink composition has excellent adhesiveness to a polyolefin-based resin substrate such as polypropylene as compared with the case where the component (A) is not included and other polyfunctional acrylate is included. And is excellent in various physical properties such as abrasion resistance. Among these, the component (A) more preferably contains hexanediol acrylate.
- the content of the component (A) in the ink composition may be 40% by mass or more, and preferably 45% by mass or more. Further, the content of the component (A) in the ink composition may be 70% by mass or less, and preferably 60% by mass or less.
- the content of the component (A) is less than 40% by mass, when the ink composition is printed on a polyolefin-based resin substrate, the resulting printed matter tends to have reduced abrasion resistance.
- the content of the component (A) exceeds 70% by mass, the ink composition tends to have low adhesion to the polyolefin-based resin substrate.
- the ink composition of the present embodiment contains at least one of a vinylamide monomer and an acryloylamine monomer as the component (B). By containing the component (B), the ink composition has excellent curability. Moreover, the obtained printed matter has excellent abrasion resistance.
- the vinylamide monomer is not particularly limited.
- the vinylamide monomer is N-vinyl-2-pyrrolidone, N-vinylcaprolactam, N-vinylacetamide, N,N'-divinylethyleneurea and the like.
- the vinylamide monomer may be used in combination.
- the acryloylamine monomer is not particularly limited.
- the acryloylamine monomer is N-acryloylmorpholine and the like.
- the acryloylamine monomer may be used in combination.
- the component (B) preferably contains at least one of N-vinylcaprolactam and acryloylmorpholine.
- the ink composition exhibits excellent adhesiveness to a polyolefin resin substrate such as polypropylene, and a printed matter having various physical properties such as abrasion resistance can be obtained.
- the content of the component (B) may be 5% by mass or more in the ink composition.
- the content of the component (B) in the ink composition may be 30% by mass or less, and preferably 20% by mass or less.
- the content of the component (B) is less than 5% by mass, the curability of the ink composition tends to decrease.
- the content of the component (B) exceeds 30% by mass, the ink composition tends to have low abrasion resistance when printed on a polyolefin-based resin substrate.
- the ink composition of the present embodiment contains, as the component (C), an acrylated amine compound having two photopolymerizable functional groups and two amino groups in the molecule. By including the component (C), the ink composition has excellent ejection stability and curability.
- the acrylated amine compound having two photopolymerizable functional groups and two amino groups in the molecule is not particularly limited.
- the photopolymerizable functional group may be a functional group capable of forming a cross-linking bond between molecules by polymerization reaction with visible light or invisible light including ionizing radiation such as ultraviolet rays or electron beams.
- the photopolymerizable functional group is a photopolymerizable functional group in a narrow sense that is directly activated by photoirradiation to undergo photopolymerization reaction, and photopolymerization initiation when photoexposed in the coexistence of a photopolymerizable functional group and a photopolymerization initiator. It includes any photopolymerizable functional group in a broad sense in which the polymerization reaction is initiated and promoted by the action of the active species generated from the agent.
- the photopolymerizable functional group includes those having photoradical polymerization reactivity such as ethylenic double bond, those having photocationic polymerization and photoanion polymerization reactivity such as cyclic ether group such as epoxy group.
- the photopolymerizable functional group is preferably an ethylenic double bond such as a (meth)acryloyl group, a vinyl group or an allyl group, and more preferably a (meth)acryloyl group. It is preferable that the two photopolymerizable functional groups of the photopolymerizable compound are both (meth)acryloyl groups, and the amine value is 130 to 142 KOHmg/g.
- the amine value means an amine value per 1 g of solid content
- a 0.1 N hydrochloric acid aqueous solution is used to conduct potentiometric titration (for example, COMMITTE (AUTO TITRATOR COM-900, BURET B-900, TITSTATIONK. -900), manufactured by Hiranuma Sangyo Co., Ltd., and converted into equivalent potassium hydroxide.
- potentiometric titration for example, COMMITTE (AUTO TITRATOR COM-900, BURET B-900, TITSTATIONK. -900), manufactured by Hiranuma Sangyo Co., Ltd., and converted into equivalent potassium hydroxide.
- the photopolymerizable compound is preferably an acrylated amine compound obtained by reacting a bifunctional (meth)acrylate with an amine compound.
- Bifunctional (meth)acrylates include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, propylene glycol di(meth)acrylate.
- Bisphenol alkylene oxide adducts such as (meth)acrylate, di(meth)acrylate, polyethylene glycol di(meth)acrylate, polyalkylene glycol di(meth)acrylate such as polypropylene glycol di(meth)acrylate, hydroxypivalic acid neopentyl glycol ester Examples thereof include di(meth)acrylate.
- Amine compounds include benzylamine, phenethylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, isobutylamine, n-pentylamine, isopentylamine, n-hexylamine, cyclohexylamine, n-heptylamine, n- Monofunctional amine compounds such as octylamine, 2-ethylhexylamine, n-nonylamine, n-decylamine, n-dodecylamine, n-tetradecylamine, n-hexadecylamine, n-octadecylamine, diethylenetriamine, triethylenetetramine, Tetraethylenepentamine, 1,6-hexamethylenediamine, 1,8-octamethylenediamine, 1,12-dodecamethylenediamine, o-phenylenedi
- the above acrylated amine compound is preferably a compound obtained by reacting 1,6-hexanediol di(meth)acrylate with an amine compound.
- the acrylated amine compound is CN371 (manufactured by Sartomer), EB7100 (EBECRYL 7100, manufactured by Cytec), Agi008 (manufactured by DSM), and the like.
- the content of the component (C) may be 0.1% by mass or more in the ink composition, and is preferably 0.5% by mass or more. Further, the content of the component (C) may be 15% by mass or less in the ink composition, and is preferably 8% by mass or less. When the content of the component (C) is less than 0.1% by mass, the curability of the ink composition tends to decrease. On the other hand, when the content of the component (C) exceeds 15% by mass, the ejection stability of the ink composition tends to decrease.
- the ink composition of this embodiment contains a monofunctional monomer (excluding the vinylamide monomer of the component (B)) as the component (D).
- the monofunctional monomer is not particularly limited.
- monofunctional monomers include cyclohexyl acrylate, tetrahydrofurfuryl acrylate, 4-t-butylcyclohexyl acrylate, caprolactone-modified tetrahydrofurfuryl acrylate, methoxy acrylate, ethoxy acrylate, t-butyl acrylate, isobutyl acrylate, 2-ethylhexyl.
- the content of the component (D) is preferably 5% by mass or more in the ink composition. Further, the content of the component (D) is preferably 30% by mass or less in the ink composition.
- the ink composition can be prepared to have a required viscosity, excellent adhesion to a polyolefin resin substrate such as polypropylene, and various physical properties such as abrasion resistance. Has the advantage of being excellent.
- Ink composition of this embodiment it is (B) molar ratio of the total molar amount M D of the total molar amount M B and (D) of component (M D / M B) is 0.1 or more preferable.
- the molar ratio (M D /M B ) is preferably 3 or less, more preferably 2 or less, and further preferably 1 or less.
- the ink composition has an advantage of having good curability.
- the photopolymerization initiator is not particularly limited.
- the photopolymerization initiator is an acylphosphine photopolymerization initiator, a triazine photopolymerization initiator, or the like.
- the photopolymerization initiator may be used in combination.
- the acylphosphine photopolymerization initiator is a photopolymerization initiator containing an acylphosphine group
- the triazine photopolymerization initiator is a photopolymerization initiator having a triazine structure.
- These photopolymerization initiators have a light absorption property over the entire wavelength range of 450 to 300 nm, and upon irradiation with light of these specific wavelengths (UV-LED), the ink composition is polymerized and polymerized.
- acylphosphine-based photopolymerization initiator examples include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2,6-dimethoxybenzoyldiphenylphosphine oxide, 2,6-dichlorobenzoyldiphenylphosphine oxide and 2,3,5,6-tetra Methylbenzoyldiphenylphosphine oxide, 2,6-dimethylbenzoyldimethylphosphine oxide, 4-methylbenzoyldiphenylphosphine oxide, 4-ethylbenzoyldiphenylphosphine oxide, 4-isopropylbenzoyldiphenylphosphine oxide, 1-methylcyclohexanoylbenzoyldiphenyl Phosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2,4,6-trimethylbenzoylphenylphosphinic acid methyl ester, 2,4,6
- the photopolymerization initiator is TPO (manufactured by Lamberti) as 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, and IRGACURE819 as bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide. (Manufactured by BASF) and the like.
- Triazine-based photopolymerization initiators are 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis(trichloromethyl)-s-triazine, 2-(p-methoxyphenyl)-4,6 -Bis(trichloromethyl)-s-triazine, 2-(p-tolyl)-4,6-bis(trichloromethyl)-s-triazine, 2-pipenyl-4,6-bis(trichloromethyl)-s-triazine , 2,4-bis(trichloromethyl)-6-styryl-s-triazine, 2-(naphth-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-methoxy- Naphtho-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2,4-trichloromethyl-(piperonyl)-6-
- the content of the photopolymerization initiator in the ink composition is preferably 3% by mass or more, and more preferably 4% by mass or more. Further, the content of the photopolymerization initiator in the ink composition is preferably 15% by mass or less, and more preferably 10% by mass or less. When the content of the photopolymerization initiator is within the above range, the ink composition can be appropriately cured.
- the photocurable inkjet printing ink composition of the present embodiment further has a light absorption property in a wavelength range of 400 nm or more, mainly in the wavelength range of ultraviolet rays, in order to promote curability with respect to ultraviolet rays using a light emitting diode (LED) as a light source.
- a photosensitizer compound capable of exhibiting a sensitizing function for curing reaction by light having a wavelength in the range can be used in combination.
- the phrase "the sensitizing function is exhibited by light having a wavelength of 400 nm or more” means having a light absorption property in a wavelength range of 400 nm or more.
- the photosensitizer includes anthracene-based sensitizers, thioxanthone-based sensitizers, and the like, and thioxanthone-based sensitizers are preferable.
- the photosensitizer may be used in combination.
- the photosensitizer is an anthracene such as 9,10-dibutoxyanthracene, 9,10-diethoxyanthracene, 9,10-dipropoxyanthracene, or 9,10-bis(2-ethylhexyloxy)anthracene.
- Examples include sensitizers, thioxanthone sensitizers such as 2,4-diethylthioxanthone, 2-isopropylthioxanthone, and 4-isopropylthioxanthone.
- thioxanthone sensitizers such as 2,4-diethylthioxanthone, 2-isopropylthioxanthone, and 4-isopropylthioxanthone.
- Typical examples of commercially available products include DBA and DEA (manufactured by Kawasaki Kasei Co., Ltd.) as anthracene sensitizers, and DETX and ITX (manufactured by LAMBSON) as thioxanthone sensitizers.
- the content of the photosensitizer is preferably more than 0 and 5.0% by mass or less in the ink composition.
- the content of the photosensitizer exceeds 5.0% by mass, it is difficult to improve the effect of blending the photosensitizer, and there is a tendency for excessive addition.
- the ink composition tends to turn yellow. Therefore, the ink composition has a yellowish hue rather than the color based on the pigment (original hue), and therefore it is preferable to appropriately determine the content of the thioxanthone sensitizer for each color. Specifically, in the white ink composition and the clear ink composition that are easily affected by the change in color, it is preferable that the ink composition does not contain a thioxanthone sensitizer as a photosensitizer. ..
- the vinylamide compound is used in combination as the photopolymerizable compound, the cured coating film that has changed color to yellow is discolored and the change in hue is likely to be a problem. Therefore, it is preferable to use the photosensitizer in a range that does not cause a problem in hue. Further, since the black ink composition and the yellow ink composition are less likely to affect the hue even if there is discoloration, and the photopolymerizability is poorer than other hues, the thioxanthone sensitizer is used as the photopolymerization initiator. Is preferably used in combination.
- the ink composition of the present embodiment preferably contains a colorant.
- a colorant By including a colorant, an ink composition of each color can be prepared.
- the colorant is not particularly limited.
- conventionally used pigments and dyes can be used without particular limitation, and pigments such as organic pigments and inorganic pigments are preferable.
- the colorant may be used in combination.
- Organic pigments include dye lake pigments, azo pigments, benzimidazolone pigments, phthalocyanine pigments, quinacridone pigments, anthraquinone pigments, dioxazine pigments, indigo pigments, thioindico pigments, perylene pigments, perinone pigments, diketopyrrolopyrrole pigments, isoindolinone pigments. , Nitro-based, nitroso-based, anthraquinone-based, flavanthrone-based, quinophthalone-based, pyranthrone-based, indanthrone-based pigments and the like.
- Inorganic pigments include colored pigments such as titanium oxide, red iron oxide, antimony red, cadmium yellow, cobalt blue, ultramarine blue, dark blue, iron black, chrome oxide green, carbon black, and graphite (including achromatic color pigments such as white and black). ) And extenders such as calcium carbonate, kaolin, clay, barium sulfate, aluminum hydroxide and talc.
- the yellow pigment is C.I. I. Pigment Yellow 1, 2, 3, 12, 13, 13, 14, 16, 17, 42, 73, 74, 75, 81, 83, 87, 93, 95, 97, 98, 108, 109, 114, 120, 128, 129, 138, 139, 150, 151, 155, 166, 180, 184, 185, 213, and C.I. I. Pigment Yellow 150, 155, 180, 213, etc. are preferable.
- Magenta pigment is C.I. I. Pigment Red 5, 7, 12, 12, 22, 38, 48:1, 48:2, 48:4, 49:1, 53:1, 57, 57:1, 63:1, 101, 102, 112, 122, 123, 144, 146, 149, 168, 177, 178, 179, 180, 184, 185, 190, 202, 209, 224, 242, 254, 255, 270, C.I. I. Pigment Violet 19 and the like, and C.I. I. Pigment Red 122, 202, Pigment Violet 19, etc. are preferable.
- Cyan pigment is C.I. I. Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 18, 22, 27, 29, 60, etc., and C.I. I. Pigment Blue 15:4 or the like is preferable.
- the black pigment is carbon black (CI Pigment Black 7) and the like.
- the white pigment is titanium oxide, aluminum oxide or the like, preferably titanium oxide or the like which has been surface-treated with various materials such as alumina and silica.
- the content of the colorant is preferably 1% by mass or more in the ink composition.
- the content of the colorant is preferably 20% by mass or less in the ink composition.
- the ink composition has suitable image quality of the printed matter obtained and has excellent viscosity characteristics.
- the pigment dispersant is preferably added to improve the dispersibility of the pigment and the storage stability of the ink composition.
- the pigment dispersant is not particularly limited.
- the pigment dispersant includes a carbodiimide dispersant, a polyesteramine dispersant, a fatty acid amine dispersant, a modified polyacrylate dispersant, a modified polyurethane dispersant, and a multi-chain polymer nonionic dispersant. , Polymeric ion activators and the like.
- the pigment dispersant may be used in combination.
- the content of the pigment dispersant is not particularly limited.
- the content of the pigment dispersant is preferably 1 to 200% by mass based on 100% by mass of the pigment.
- the obtained ink composition has excellent storage stability.
- the surfactant is preferably blended in order to improve the ejection stability of the ink composition.
- the surfactant is not particularly limited.
- the surfactant is a silicone-based surfactant, an acetylene glycol-based surfactant, a fluorine-based surfactant, or the like.
- the surfactant may be used in combination.
- the silicone surfactant is polyether-modified silicone oil, polyester-modified polydimethylsiloxane, polyester-modified methylalkylpolysiloxane, etc.
- the content of the surfactant is not particularly limited.
- the content of the surfactant is preferably 0.005 to 1.0% by mass in the ink composition.
- the content of the surfactant is within the above range, the surface tension of the obtained ink composition is appropriately adjusted, bubbles are less likely to be contained, and ejection stability is improved.
- the ink composition of the present embodiment may be blended with various additives, if necessary, in order to express various functionalities.
- the optional component is, for example, a light stabilizer, a surface treatment agent, an antioxidant, an antioxidant, a crosslinking accelerator, a polymerization inhibitor, a plasticizer, a preservative, a pH adjuster, a defoaming agent, a moisturizing agent, etc. ..
- the ink composition of the present embodiment may have a viscosity at 25° C. of 300 mPa ⁇ s or less, and preferably 20 mPa ⁇ s or less. If necessary, a viscosity modifier or the like is added so that the viscosity is 200 mPa ⁇ s or less.
- the viscosity can be measured using an E-type viscometer (RE100L-type viscometer, manufactured by Toki Sangyo Co., Ltd.) under the conditions of 25° C. and 20 rpm.
- the method for preparing the ink composition of this embodiment is not particularly limited.
- the ink composition can be prepared by adding all the above-mentioned materials and mixing them with a bead mill, a three-roll mill or the like.
- a contour base ink is obtained in advance by mixing the pigment, the above pigment dispersant and the above photopolymerizable compound, and the remaining amount of the above components is adjusted so as to have a desired composition. You may add and prepare.
- the method for producing a printed matter according to the present embodiment includes a step of printing the above-mentioned ink composition on a substrate by an ink jet method.
- the base material is not particularly limited.
- the base material is each resin base material, paper, capsule, gel, metal foil, glass, wood, cloth or the like.
- the ink composition of the present embodiment when printed on a polyolefin-based resin substrate such as polypropylene or polyethylene, exhibits excellent adhesion to these substrates, curability and scratch resistance. A printed matter having excellent properties can be produced.
- the method for curing the ink composition is not particularly limited.
- the ink composition can be cured by being exposed to light after being discharged onto a substrate.
- the above ink composition is supplied to a printer head of an inkjet printer device so that the film thickness of the coating film is 1 to 20 ⁇ m from the printer head to the substrate. It can be performed by discharging.
- the exposure and curing with light (curing of the image) can be carried out by irradiating the ink composition coated on the substrate as an image with light.
- the light source that emits light is not particularly limited.
- the light source is ultraviolet light, electron beam, visible light, light emitting diode (LED), or the like.
- the ink composition of the present embodiment it is possible to obtain a printed matter that exhibits excellent adhesiveness to a polyolefin resin substrate such as polypropylene and has various physical properties such as abrasion resistance.
- a photocurable ink composition for ink jet printing which is 0.1 to 15% by mass in the printing ink composition and has a viscosity at 25° C. of 200 mPa ⁇ s or less.
- the photocurable ink jet printing ink composition exhibits excellent adhesiveness to a polyolefin-based resin substrate such as polypropylene, and has excellent physical properties such as abrasion resistance. Obtainable.
- the photocurable ink composition for ink jet printing has excellent curability, exhibits superior adhesiveness to a polyolefin resin substrate such as polypropylene, and has various abrasion resistance and the like. A printed matter having more excellent physical properties can be obtained.
- the photocurable ink composition for ink jet printing has higher resistance to abrasion and the like, and higher adhesion to polyethylene and polypropylene base materials.
- the photocurable ink jet printing ink composition has an advantage that it is possible to prepare an ink composition of each color.
- a component (trade name: Light acrylate MPD-A, Kyoeisha Chemical Co., Ltd.) Dipropylene glycol diacrylate: (A) component, (Brand name: DPGDA, manufactured by Daicel Okunesis Co., Ltd.
- hexanediol diacrylate (A) component, (Brand name: Viscoat #230, manufactured by Osaka Organic Chemical Industry Co., Ltd.) Phenoxyethyl acrylate: (D) component, (trade name: SR339A, manufactured by Sartomer) Benzyl acrylate: (D) component, (Brand name: Biscoat #160, manufactured by Osaka Organic Chemical Industry Co., Ltd.) Acryloylmorpholine: (B) component, (Brand name: ACMO, KJ Chemicals Co., Ltd.) Vinylcaprolactam: (B) component, (trade name: V-CAP, manufactured by ISP Japan Co., Ltd.) Ethoxylated pentaerythritol tetraacrylate: (trade name: SR494, manufactured by Sartomer) Polyethylene glycol (600) diacrylate: (Product name: SR610, manufactured by Sartomer) Trimethylolpropane triacrylate: (trade name: SR351, manufactured by
- Example 1 Cyan ink composition According to the formulation (% by mass) shown in Table 1, the pigment (PB15:4), the pigment dispersant (PX4701), and the photopolymerizable compound (amine-modified oligomer, hexanediol diacrylate, phenoxyethyl acrylate, vinylcaprolactam) were added. The blended mixture was dispersed using an Eiger mill (using zirconia beads having a diameter of 0.5 mm as a medium) to obtain a conch base. Each component was added to the obtained concrete base so as to have the formulation shown in Table 1 and mixed by stirring to obtain an ink composition of Example 1.
- Eiger mill using zirconia beads having a diameter of 0.5 mm as a medium
- Examples 2 to 13, Comparative Examples 1 to 9 An ink composition was prepared in the same manner as in Example 1 except that the formulation shown in Table 1 was changed.
- the viscosity of the ink composition was measured using an E-type viscometer (RE100L-type viscometer, manufactured by Toki Sangyo Co., Ltd.) under the conditions of a temperature of 25° C. and a rotor rotation speed of 20 rpm.
- E-type viscometer RE100L-type viscometer, manufactured by Toki Sangyo Co., Ltd.
- the ink composition was placed in a glass bottle, tightly closed, and stored at 70° C. for 7 days, and the state was evaluated according to the following evaluation criteria.
- ⁇ In the ink composition, neither thickening nor sedimentation was observed.
- ⁇ The ink composition was found to have a viscosity and a sediment that returned to the original level when shaken lightly.
- X The ink composition has thickening and sedimentation that are not restored even if shaken vigorously.
- the ink jet recording apparatus equipped with an ink jet nozzle and the ink composition were placed for 24 hours at an ambient temperature of 25° C., and the temperature of the ink jet recording apparatus and the ink composition was set to 25° C. Then, the ink composition was used to continuously print (print) on a polypropylene sheet at 25° C., and the ejection stability was evaluated according to the following evaluation criteria. ⁇ : There was no printing disorder and stable ejection was possible. ⁇ : The printing was slightly disturbed, but the ejection was almost stable. X: There was disturbance in printing, or stable ejection was not possible.
- the ink jet recording device and the ink composition were placed for 24 hours under an atmosphere temperature of 25° C., and the temperature of the ink jet regulation device and the ink composition was set to 25° C. Then, at 25° C., a polypropylene sheet and a polyethylene sheet are continuously printed (printed) with the ink composition at 25° C., and then the lamp and the ink-coated surface are treated with a UV-LED light lamp manufactured by Fosseon Technology. At a distance of 2 cm, the resin was cured with a UV integrated light amount of 180 mJ/cm 2 . The curable coating film thus obtained was rubbed with a cotton swab, and the curability was evaluated according to the degree of removal. ⁇ : Not taken ⁇ : There was slight removal. X: There was peeling.
- the ink composition of Comparative Example 5 containing no component (C) was inferior in curability.
- the ink composition of Comparative Example 7 which did not contain the component (A) was inferior in the adhesiveness of the printed matter.
- the ink composition of Comparative Example 8 which did not contain the component (A) was inferior in the adhesiveness of the printed matter.
- the ink composition of Comparative Example 9 containing no component (A) was inferior in abrasion resistance of the printed matter.
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Abstract
Description
本発明の一実施形態の光硬化型インキジェット印刷用インキ組成物(以下、インキ組成物ともいう)は、(A)ヘキサンジオールアクリレート、3-メチル-1,5-ペンタンジオールジアクリレート、ジプロピレングリコールジアクリレートおよびヒドロキシピパリン酸ネオペンチルグリコールジアクリレートからなる群から選択される少なくとも1種と、(B)ビニルアミドモノマーおよびアクリロイルアミンモノマーのうち少なくともいずれか一方と、(C)分子内に2個の光重合性官能基と2個のアミノ基とを有するアクリル化アミン化合物と、(D)単官能モノマー(ただし(B)成分のビニルアミドモノマーを除く)と、光重合開始剤とを含む。(A)成分の含有量は、光硬化型インキジェット印刷インキ組成物中、40~70質量%である。(B)成分の含有量は、光硬化型インキジェット印刷インキ組成物中、5~30質量%である。(C)成分の含有量は、光硬化型インキジェット印刷用インキ組成物中、0.1~15質量%である。25℃における粘度は、200mPa・s以下である。以下、それぞれについて説明する。
本実施形態のインキ組成物は、(A)成分として、ヘキサンジオールアクリレート、3-メチル-1,5-ペンタンジオールジアクリレート、ジプロピレングリコールジアクリレートおよびヒドロキシピパリン酸ネオペンチルグリコールジアクリレートからなる群から選択される少なくとも1種を含む。(A)成分が含まれることにより、インキ組成物は、(A)成分を含まず他の多官能アクリレートを含む場合と比較して、ポリプロピレン等のポリオレフィン系樹脂基材に対して優れた接着性を示し、耐擦性等の各種物性が優れるという点が優れる。これらの中でも、(A)成分は、ヘキサンジオールアクリレートを含むことがより好ましい。
本実施形態のインキ組成物は、(B)成分として、ビニルアミドモノマーおよびアクリロイルアミンモノマーのうち少なくともいずれか一方を含む。(B)成分が含まれることにより、インキ組成物は、硬化性が優れる。また、得られる印刷物は、耐擦性が優れる。
本実施形態のインキ組成物は、(C)成分として、分子内に2個の光重合性官能基と2個のアミノ基とを有するアクリル化アミン化合物を含む。(C)成分が含まれることにより、インキ組成物は、吐出安定性および硬化性が優れる。
本実施形態のインキ組成物は、(D)成分として、単官能モノマー(ただし(B)成分のビニルアミドモノマーを除く)を含む。
光重合開始剤は特に限定されない。一例を挙げると、光重合開始剤は、アシルホスフィン系光重合開始剤、トリアジン系光重合開始剤等である。光重合開始剤は、併用されてもよい。
本実施形態の光硬化型インクジェット印刷用インキ組成物には、さらに、発光ダイオード(LED)を光源とした紫外線に対する硬化性を促進するために、400nm以上の主に紫外線の波長域で光吸収特性を有し、その範囲の波長の光により硬化反応の増感機能が発現する光増感剤(化合物)を併用使用することができる。なお、上記「400nm以上の波長の光により増感機能が発現する」とは、400nm以上の波長域で光吸収特性を有することをいう。このような増感剤を用いることで、本発明の光硬化型インクジェット印刷用インキ組成物のLED硬化性を促進させることができる。
本実施形態のインキ組成物は、着色剤を含むことが好ましい。着色剤を含有させることにより、インキ組成物は、各色のインキ組成物を作製することができる。
顔料分散剤は、顔料の分散性、および、インキ組成物の保存安定性を向上させるために好適に配合される。
界面活性剤は、インキ組成物の吐出安定性を向上させるために好適に配合される。界面活性剤は特に限定されない。一例を挙げると、界面活性剤は、シリコーン系界面活性剤、アセチレングリコール系界面活性剤、フッ素系界面活性剤等である。界面活性剤は、併用されてもよい。
本実施形態のインキ組成物は、必要に応じて、種々の機能性を発現させるため、各種の添加剤が配合されてもよい。任意成分は、たとえば、光安定化剤、表面処理剤、酸化防止剤、老化防止剤、架橋促進剤、重合禁止剤、可塑剤、防腐剤、pH調整剤、消泡剤、保湿剤等である。
本実施形態のインキ組成物を調製する方法は特に限定されない。一例を挙げると、インキ組成物は、上記した材料を全て添加してビーズミルや3本ロールミル等で混合して調製することができる。なお、顔料を配合する場合は、顔料、上記顔料分散剤および上記光重合性化合物を混合することにより、予めコンタベースインキを得て、そこに所望の組成となるよう上記の成分の残余の分を添加して調製してもよい。
次に、本実施形態のインキ組成物を用いて印刷物を製造する方法について説明する。
<着色剤>
赤色顔料(PR122)
黄色顔料(PY150)
青色顔料(PB15:4、PB7)
黒色顔料(PB7)
白色顔料(PW6)
<顔料分散剤>
PB822:味の素ファインテクノ(株)製
ソルスパース4000GR:日本ルーブリゾール(株)製
ソルスパースJ180:日本ルーブリゾール(株)製
<光重合性化合物>
アミン変性オリゴマー:(C)成分、分子内に2個の光重合性官能基および2個のアミノ基を有するアクリル化アミン化合物のオリゴマー(CN371:サートマー社製)
3-メチル-1.5-ペンタンジオールジアクリレート:(A)成分、(商品名:ライトアクリレートMPD-A、共栄社化学(株)製)
ジプロピレングリコールジアクリレート:(A)成分、(商品名:DPGDA、ダイセル・オクネシス社製
ヘキサンジオールジアクリレート:(A)成分、(商品名:ビスコート#230、大阪有機化学工業(株)製)
フェノキシエチルアクリレート:(D)成分、(商品名:SR339A、サートマー社製)
ベンジルアクリレート:(D)成分、(商品名:ビスコート#160、大阪有機化学工業(株)製)
アクリロイルモルホリン:(B)成分、(商品名:ACMO、KJケミカルズ(株)製)
ビニルカプロラクタム:(B)成分、(商品名:V-CAP、ISPジャパン(株)製)
エトキシ化ペンタエリスリトールテトラクリレート:(商品名:SR494、サートマー社製)
ポリエチレングリコール(600)ジアクリレート:(商品名:SR610、サートマー社製)
トリメチロールプロパントリアクリレート:(商品名:SR351、サートマー社製)
<光重合開始剤>
TPO:2,4,6-trimethylbenzoyl diphenyl phosphine oxide(LAMBERTI社製)
<増感剤>
DETX:2,4-ジエチルチオキサントン(Lambson社製)
<重合禁止剤>
MEHQ(ヒドロキノンモノメチルエーテル)
HQ(ヒドロキノン)
<レベリング剤>
BYK-331(ポリエーテル変性ポリジメチルシロキサン、BYK Chemie社製)
表1に示される処方(質量%)にしたがって、顔料(PB15:4)と顔料分散剤(PX4701)と光重合性化合物(アミン変性オリゴマー、ヘキサンジオールジアクリレート、フェノキシエチルアクリレート、ビニルカプロラクタム)とを配合した混合物を、アイガーミル(メディアとして直径0.5mmのジルコニアビーズを使用)を用いて分散させてコンクベースを得た。得られたコンクベースに、表1の処方となるように各成分を配合し、撹拌混合して、実施例1のインキ組成物を得た。
表1に記載の処方に変更した以外は、実施例1と同様の方法により、インキ組成物を調製した。
実施例1~13および比較例1~9のインキ組成物を用いて、以下の評価方法および評価基準にしたがって、(B)成分の全モル量MBと(D)成分の全モル量MDとのモル比率(MD/MB)、インキ組成物の粘度、保存安定性、吐出安定性、印刷物の硬化性、密着性および耐擦性を評価した。結果を表1に示す。
インキ組成物の粘度は、E型粘度計(RE100L型粘度計、東機産業(株)製)を使用して、温度25℃、ローター回転速度20rpmの条件で測定した。
インキ組成物をガラス瓶に採り、密栓して70℃で7日間保存した後の状態を、下記評価基準に従って評価した。
○:インキ組成物は、増粘、沈降物が共に認められなかった。
△:インキ組成物は、軽く振ると元に戻る程度の増粘や沈降物が認められた。
×:インキ組成物は、強く振っても元に戻らない程度の増粘や沈降物が認められる。
25℃の雰囲気温度下に、インクジェットノズルを備えたインクジェット記録装置と、インキ組成物とを24時間置き、インクジェット記録装置およびインキ組成物の温度を25℃とした。その後、25℃で、インキ組成物を用いてポリプロピレンシート上に、連続的に印刷(印字)して、吐出安定性を以下の評価基準にしたがって評価した。
○:印刷の乱れがなく、安定して吐出できた。
△:印刷の乱れが若干あったが、ほぼ安定して吐出できた。
×:印刷の乱れがあったか、または、安定して吐出できなかった。
25℃の雰囲気温度下に、インクジェット記録装置と、インキ組成物とを24時間置き、インクジェット規則装置およびインキ組成物の温度を25℃とした。その後、25℃で、インキ組成物を用いてポリプロピレンシート、ポリエチレンシート上に、連続的に印刷(印字)した後、フォセオン・テクノロジー社製UV-LED光ランプにて、ランプとインキの塗布面との距離2cm下で、UV積算光量180mJ/cm2で硬化させた。得られた硬化性塗膜を綿棒でこすり、その取られ具合により硬化性を評価した。
○:取られがなかった。
△:わずかに取られがあった。
×:取られがあった。
フォセオン・テクノロジー社製UV-LED光ランプにて、ランプとインキ組成物の塗布面との距離2cm、1回当たりの照射時間1秒の照射条件(1秒間当たりのUV積算光量60mJ/cm2)下で、表面のタックがなくなるまで照射して得られた塗膜をカッターナイフでクロスカットし、カットした部分にセロハンテープ(登録商標)(ニチバン(株)製)を貼り、これを引き剥がすことによりポリプロピレンシート、ポリエチレンシートからの硬化膜の剥離具合を以下の評価基準に従って評価した。
○:硬化膜は、剥離しなかった。
△:硬化膜は、剥離があったが剥離面積が20%未満であった。
×:硬化膜は、剥離面積が20%以上剥離した。
上記密着性の評価において得られた硬化膜について、学振型堅牢度試験機((株)大栄科学精器製作所製)を用いて、晒し布で500g×200回塗膜を擦ったときの、ポリプロピレンシート、ポリエチレンシートからの硬化膜の取られ具合を目視で観察し、以下の評価基準にしたがって評価した。
○:硬化膜の取られが無かった。
△:硬化膜の表面に傷があった。
×:硬化膜が取られ、シートがみえた。
Claims (4)
- (A)ヘキサンジオールアクリレート、3-メチル-1,5-ペンタンジオールジアクリレート、ジプロピレングリコールジアクリレートおよびヒドロキシピパリン酸ネオペンチルグリコールジアクリレートからなる群から選択される少なくとも1種と、(B)ビニルアミドモノマーおよびアクリロイルアミンモノマーのうち少なくともいずれか一方と、(C)分子内に2個の光重合性官能基と2個のアミノ基とを有するアクリル化アミン化合物と、(D)単官能モノマー(ただし前記(B)成分のビニルアミドモノマーを除く)と、光重合開始剤とを含み、
前記(A)成分の含有量は、光硬化型インキジェット印刷インキ組成物中、40~70質量%であり、
前記(B)成分の含有量は、光硬化型インキジェット印刷インキ組成物中、5~30質量%であり、
前記(C)成分の含有量は、光硬化型インキジェット印刷用インキ組成物中、0.1~15質量%であり、
25℃における粘度が200mPa・s以下である、光硬化型インキジェット印刷用インキ組成物。 - 前記(B)成分は、N-ビニルカプロラクタムおよびアクリロイルモルホリンのうち、少なくともいずれか1種を含む、請求項1記載の光硬化型インキジェット印刷用インキ組成物。
- 前記(B)成分の全モル量MBと(D)成分の全モル量MDとのモル比率(MD/MB)は、0.1~3である、請求項1または2記載の光硬化型インキジェット印刷用インキ組成物。
- さらに、着色剤を含む、請求項1~3のいずれか1項に記載の光硬化型インキジェット印刷用インキ組成物。
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CN116157474B (zh) * | 2020-08-07 | 2024-06-07 | 阪田油墨股份有限公司 | 光固化型喷墨印刷用油墨组合物 |
Also Published As
Publication number | Publication date |
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KR20210107636A (ko) | 2021-09-01 |
EP3904469A4 (en) | 2022-09-21 |
US11912881B2 (en) | 2024-02-27 |
JP7246921B2 (ja) | 2023-03-28 |
JP2020100777A (ja) | 2020-07-02 |
EP3904469A1 (en) | 2021-11-03 |
CN113330077A (zh) | 2021-08-31 |
AU2019413832A1 (en) | 2021-04-08 |
US20220041879A1 (en) | 2022-02-10 |
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