WO2008069538A1 - Styrene-butadiene latex binder for ink-jet paper, preparation method thereof and coating liquid containing the same - Google Patents
Styrene-butadiene latex binder for ink-jet paper, preparation method thereof and coating liquid containing the same Download PDFInfo
- Publication number
- WO2008069538A1 WO2008069538A1 PCT/KR2007/006229 KR2007006229W WO2008069538A1 WO 2008069538 A1 WO2008069538 A1 WO 2008069538A1 KR 2007006229 W KR2007006229 W KR 2007006229W WO 2008069538 A1 WO2008069538 A1 WO 2008069538A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- styrene
- ink
- weight parts
- jet paper
- butadiene latex
- Prior art date
Links
- 239000002174 Styrene-butadiene Substances 0.000 title claims abstract description 70
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000011115 styrene butadiene Substances 0.000 title claims abstract description 70
- 229920003048 styrene butadiene rubber Polymers 0.000 title claims abstract description 70
- 239000004816 latex Substances 0.000 title claims abstract description 65
- 229920000126 latex Polymers 0.000 title claims abstract description 64
- 239000011248 coating agent Substances 0.000 title claims abstract description 53
- 238000000576 coating method Methods 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 239000011230 binding agent Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000178 monomer Substances 0.000 claims abstract description 49
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 24
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 22
- 230000009477 glass transition Effects 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 229920002554 vinyl polymer Polymers 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 125000005907 alkyl ester group Chemical group 0.000 claims description 4
- 150000001768 cations Chemical class 0.000 claims description 4
- 239000012986 chain transfer agent Substances 0.000 claims description 4
- 239000001023 inorganic pigment Substances 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 15
- 238000001035 drying Methods 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011118 polyvinyl acetate Substances 0.000 description 10
- 229920002689 polyvinyl acetate Polymers 0.000 description 10
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 3
- 239000003505 polymerization initiator Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- JHJUUEHSAZXEEO-UHFFFAOYSA-M sodium;4-dodecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCC1=CC=C(S([O-])(=O)=O)C=C1 JHJUUEHSAZXEEO-UHFFFAOYSA-M 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- YZBOVSFWWNVKRJ-UHFFFAOYSA-M 2-butoxycarbonylbenzoate Chemical compound CCCCOC(=O)C1=CC=CC=C1C([O-])=O YZBOVSFWWNVKRJ-UHFFFAOYSA-M 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- GWZMWHWAWHPNHN-UHFFFAOYSA-N 2-hydroxypropyl prop-2-enoate Chemical compound CC(O)COC(=O)C=C GWZMWHWAWHPNHN-UHFFFAOYSA-N 0.000 description 1
- IZUVGRMMRWJVKU-UHFFFAOYSA-N 3-ethoxycarbonylbut-3-enoic acid Chemical compound CCOC(=O)C(=C)CC(O)=O IZUVGRMMRWJVKU-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- UIERETOOQGIECD-UHFFFAOYSA-N Angelic acid Natural products CC=C(C)C(O)=O UIERETOOQGIECD-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- 206010033296 Overdoses Diseases 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- UTOVMEACOLCUCK-PLNGDYQASA-N butyl maleate Chemical compound CCCCOC(=O)\C=C/C(O)=O UTOVMEACOLCUCK-PLNGDYQASA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- -1 it- aconamide Chemical compound 0.000 description 1
- FSQQTNAZHBEJLS-UPHRSURJSA-N maleamic acid Chemical compound NC(=O)\C=C/C(O)=O FSQQTNAZHBEJLS-UPHRSURJSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- UIERETOOQGIECD-ONEGZZNKSA-N tiglic acid Chemical compound C\C=C(/C)C(O)=O UIERETOOQGIECD-ONEGZZNKSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 239000003232 water-soluble binding agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
- C08L9/08—Latex
-
- 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
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
-
- 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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
Definitions
- the present invention relates to a styrene-butadiene latex binder for ink-jet paper, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper with low surface negative charge density, a preparation method thereof, a coating liquid for ink-jet paper with excellent price competitiveness and coating workability with requiring less energy costs for drying process, and an ink-jet paper having satisfactory printing quality.
- the digital printing can be divided largely into two different methods; toner type and ink-jet type.
- toner type In the late 2000, the digital printing already held 41% of the market in the case that required copies were up to 2000. And its market sharing will be soon as high as the conventional offset printing.
- the ink-jet type the most universal type for digital printing, has been generally used for multiple color printing, which will extend its market sharing according to the generalization of digital camera and the use of images on internet.
- silica has been used as a major material
- polyvinyl alcohol and polyvinyl acetate have been used as a binder for the production of ink-jet paper.
- more upgraded materials are multi-layered for photopapers.
- polyvinyl alcohol and polyvinyl acetate as a binder is that the major material silica has a very wide specific surface area asking a high adhesive force and they have excellent compatibility with ink-jet ink comprising soluble dye.
- polyvinyl acetate has a weak ionic strength, suggesting that it does not interact with polyD ADMAC which is a cation additive used for the production of a coating liquid for ink-jet paper, so that quantum properties for ink-jet paper can be well preserved.
- these water-soluble binders, polyvinyl alcohol and polyvinyl acetate are very expensive materials and intensively increase the viscosity of a coating liquid, resulting in the decrease of coating workability, the increase of energy cost for drying process and deterioration of the quality of ink-jet paper.
- polyvinyl acetate causes irregularity of a product and has insufficient functions as an ink-jet binder. Disclosure of Invention Technical Problem
- the present invention provides a styrene-butadiene latex binder for ink-jet paper, which contains 0.1 - 1.5 weight parts of ethylenically unsaturated monomer for 100 weight parts of the total monomer and has glass transition temperature of 20 - 50 1 C.
- the present invention also provides a preparation method of the styrene-butadiene latex.
- the present invention further provides a coating liquid for ink-jet paper containing the styrene-butadiene latex.
- the present invention also provides an ink-jet paper coated with the coating liquid.
- the present inventors completed this invention by confirming that the use of the styrene-butadiene latex having low surface negative charge density and regular glass transition temperature instead of the high-price polyvinyl acetate, one of the two major materials (polyvinyl alcohol and polyvinyl acetate) for the conventional ink-jet paper binder, has advantages of producing ink-jet paper with excellent printing quality, improvement of coating workability owing to the low viscosity, and reducing drying energy owing to the low water holding capacity.
- the styrene-butadiene latex of the present invention is the latex for ink-jet paper binder which contains 0.1 - 1.5 weight parts of ethylenically unsaturated monomer for 100 weight parts of the total monomer and has glass transition temperature of 20 - 5ffC.
- the styrene-butadiene latex is prepared by the polymerization of 100 weight parts of monomer mixture comprising 20 - 85 weight parts of styrene monomer, 10 - 70 weight parts of butadiene monomer, 0.5 - 15 weight parts of vinyl cyan monomer, 0.1 - 1.5 weight parts of ethylenically unsaturated monomer and 1 - 25 weight parts of a monomer copolymerizable with the above monomers.
- the styrene monomer herein plays a role in regulating hardness and water resistance of the polymerized latex and can be any styrene monomer that has been used for the production of the conventional styrene-butadiene latex.
- the butadiene monomer herein gives flexibility to the polymerized latex and can be any butadiene monomer that has been used for the production of the conventional styrene-butadiene latex and preferably 1,3-butadiene.
- the ethylenically unsaturated monomer can be unsaturated carboxylic acid or unsaturated polycarboxylic acid alkyl ester having at least one or more carboxylic acid group.
- the unsaturated carboxylic acid is preferably one or more compounds selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, crotonic acid, fi ⁇ maric acid and maleic acid.
- the unsaturated polycarboxylic acid alkyl ester is preferably one or more compounds selected from the group consisting of itaconic acid monoethyl ester, fi ⁇ maric acid monobutyl ester and maleic acid monobutyl ester.
- the ethylenically unsaturated monomer plays a role in maintaining the stability of particles and changes the latex as anionic.
- this monomer can interact with the cationic additive 'polyD ADMAC that has been generally used for the preparation of a coating liquid for ink-jet paper, resulting in the rapid increase of viscosity. Therefore, the content of this monomer is preferably regulated as minimum in order to maintain the stability of particles, which would be 0.1 - 1.5 weight parts for 100 weight parts of the total monomer.
- the vinyl cyan monomer herein is acrylonitrile or methacrylonitrile.
- the monomer applicable for the copolymerization is one or more compounds selected from the group consisting of unsaturated carboxylic acid alkyl ester, unsaturated carboxylic acid hydroxyl alkyl ester, unsaturated carboxylic acid amide and its derivatives, and aromatic vinyl monomer.
- the unsaturated carboxylic acid alkyl ester is preferably one or more compounds selected from the group consisting of methylacrylate, methylmethacrylate, ethylacrylate and butylacrylate.
- the unsaturated carboxylic acid hydroxyl alkyl ester is preferably one or more compounds selected from the group consisting of ⁇ -hydroxyethyl acrylate, ⁇ - hydroxypropyl acrylate and ⁇ -hydroxyethyl methacrylate.
- the unsaturated carboxylic acid amide and its derivatives are preferably one or more compounds selected from the group consisting of acrylamide, methacrylamide, it- aconamide, maleic acid monoamide and their derivatives.
- the aromatic vinyl monomer is preferably one or more compounds selected from the group consisting of ⁇ -methylstyrene, vinyltoluene and p-methylstyrene.
- the styrene-butadiene latex binder for ink-jet paper has the particle size of 150 - 300 nm. When the particle size is in the range, viscosity is lowered and thus coating workability is excellent.
- the styrene-butadiene latex binder for ink-jet paper has preferably the glass transition temperature of 20 - 50C
- the glass transition temperature is in the range, viscosity and water holding capacity are lowered, and thus coating workability is excellent and drying energy is reduced. If the glass transition temperature is lower than the above range, absorption will be observed on the surface of silica having porous structure and a membrane will be formed, resulting in the decrease of pores of the coating layer. On the contrary, if the glass transition temperature is higher than the above range, adhesive force of the coating layer will be reduced.
- the preparation method of the styrene-butadiene latex binder for ink-jet paper of the invention is the polymerization of 100 weight parts of monomer mixture comprising 20 - 85 weight parts of styrene monomer, 10 - 70 weight parts of butadiene monomer, 0.5 - 15 weight parts of vinyl cyan monomer, 0.1 - 1.5 weight parts of ethylenically unsaturated monomer and 1 - 25 weight parts of another monomer being able to be co- polymerized with the above monomers.
- a chain transfer agent can be additionally included in the polymerization of the styrene-butadiene latex and the preferable amount of the chain transfer agent at this time is 0.1 - 5 weight parts for 100 weight parts of the total monomer.
- the conventional styrene-butadiene seed can be used and the content is not limited.
- the size of the seed is 20 - 100 nm and the content is preferably 1 - 15 weight parts for 100 weight parts of the total monomer.
- the styrene-butadiene latex can additionally include additives such as a polymerization initiator, an emulsifying agent and electrolytes.
- the chain transfer agent is used to regulate molecular weight of the styrene- butadiene latex, gel content and gel structure, which is exemplified by n-dodecyl mercaptan, t-dodecyl mercaptan, etc.
- the coating liquid for ink-jet paper of the invention comprises silica (inorganic pigment), polyvinyl alcohol (binder), the styrene-butadiene latex prepared above and polyDADMAC (cation additive).
- the coating liquid is preferably composed of 100 weight parts of silica, 30 - 100 weight parts of the binder and 10 - 20 weight parts of polyDADMAC.
- the binder does not reduce the porosity of the coating layer, resulting in the excellent printing quality. If the content of the binder is at least 30 weight parts, binding strength inside of the coating layer will be excellent, resulting in excellent adhesive force and surface strength.
- the binder herein is preferably composed of polyvinyl alcohol and the styrene- butadiene latex at the weight ratio of 5:1 - 1:5 (polyvinylalcohol: styrene-butadiene latex).
- the ink-jet paper is the paper coated with the above coating liquid.
- the base paper 72 gsm was coated with the coating liquid prepared above by 8 g/ m 2 , which was dried in a 130 1 C oven for 20 seconds, followed by calendering at 4(JQ 100 kgf/cm to prepare the ink-jet paper.
- the styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that the amount of styrene- butadiene seed was adjusted to 1.5 weight parts to regulate the particle size.
- the styrene -butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 18 weight parts, styrene was added by 66 weight parts, and styrene-butadiene seed was added by 1.5 weight parts to regulate the particle size and the glass transition temperature.
- the coating liquid and the ink-jet paper were prepared by using the conventional polyvinyl acetate commercialized for ink-jet paper instead of the styrene-butadiene latex prepared in example 1.
- the styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 31 weight parts and styrene was added by 53 weight parts to compare the glass transition temperature.
- the styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 31 weight parts, styrene was added by 53 weight parts and styrene-butadiene seed was added by 13 weight parts to compare the particle size and the glass transition temperature.
- the styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 38 weight parts, styrene was added by 46 weight parts, itaconic acid was added by 3.5 weight parts, styrene-butadiene seed was added by 13 weight parts and dodecyl benzene sodium sulfonate was added by 0.25 weight part to compare the surface negative charge density.
- the styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 4 except that butadiene was added by 25 weight parts, styrene was added by 59 weight parts, itaconic acid was added by 2.4 weight parts and styrene-butadiene seed was added by 8.5 weight parts to compare the surface negative charge density and the particle size.
- the styrene-butadiene latexes (examples 1 - 4) prepared by using a small amount of ethylenically unsaturated monomer of the invention exhibited low surface negative charge density, while the latexes (comparative examples 4 - 5) prepared by using a over-dose of ethylenically unsaturated monomer showed significantly high surface negative charge density.
- coating liquids of examples 1 - 4 of the present invention had lower water holding capacity than the product of comparative example 1 which was prepared by using polyvinyl acetate as a binder.
- the ink-jet papers prepared in examples 1 - 4 of the invention which contained polyvinyl acetate exhibited as excellent color density and whiteness as the ink-jet paper prepared in comparative example 1 and better water fastness and surface strength.
- the styrene-butadiene latex binder for ink-jet paper of the present invention has excellent price competitiveness, low surface negative charge density, and regular glass transition temperature, resulting in increase of coating workability and decrease of energy cost for drying process during the production of the coating liquid for ink-jet paper and thereby can provide the ink-jet paper with excellent printing quality.
- the present invention also provides a preparation method of the styrene-butadiene latex.
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Abstract
The present invention relates to a styrene-butadiene latex, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper containing ethylenically unsaturated monomer by 0.1 - 1.5 weight parts with lowering surface negative charge density, a preparation method thereof and a coating liquid containing the same. The present invention provides a coating liquid for ink-jet paper having excellent price competitiveness and coating workability and at the same time reducing energy cost for drying process and thereby provides an ink-jet paper with excellent printing quality.
Description
Description
STYRENE-BUTADIENE LATEX BINDER FOR INK- JET PAPER, PREPARATION METHOD THEREOF AND COATING LIQUID
CONTAINING THE SAME
Technical Field
[1] The present invention relates to a styrene-butadiene latex binder for ink-jet paper, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper with low surface negative charge density, a preparation method thereof, a coating liquid for ink-jet paper with excellent price competitiveness and coating workability with requiring less energy costs for drying process, and an ink-jet paper having satisfactory printing quality. Background Art
[2] Cultural paper which has been a medium for the delivery of information and advertisement, gradually hands over its position to the digital media as popularization of computer and commercialization of internet are realized and innovative development of other electric communication apparatus advance. The method of publishing books and magazines changes from 'printing and distribution' into 'distribution and printing,' and big demand for an adequate paper is expected with the growth of digital system. Unlike the conventional system (printed and bound books are sold in bookstores), the recent digital system sends the information through internet and then a dealer or a consumer searches the information and if wanted the dealer or the consumer prints the information directly by formatted digital printing method. And this digital printing system is expected to be generalized in near future.
[3] The digital printing can be divided largely into two different methods; toner type and ink-jet type. In the late 2000, the digital printing already held 41% of the market in the case that required copies were up to 2000. And its market sharing will be soon as high as the conventional offset printing.
[4] The ink-jet type, the most universal type for digital printing, has been generally used for multiple color printing, which will extend its market sharing according to the generalization of digital camera and the use of images on internet. Up to date, silica has been used as a major material and polyvinyl alcohol and polyvinyl acetate have been used as a binder for the production of ink-jet paper. To increase preservation and image reproducibility, more upgraded materials are multi-layered for photopapers.
[5] The reason of using polyvinyl alcohol and polyvinyl acetate as a binder is that the major material silica has a very wide specific surface area asking a high adhesive force and they have excellent compatibility with ink-jet ink comprising soluble dye. In addition, polyvinyl acetate has a weak ionic strength, suggesting that it does not interact with polyD ADMAC which is a cation additive used for the production of a coating liquid for ink-jet paper, so that quantum properties for ink-jet paper can be well preserved. However, these water-soluble binders, polyvinyl alcohol and polyvinyl acetate, are very expensive materials and intensively increase the viscosity of a coating liquid, resulting in the decrease of coating workability, the increase of energy cost for drying process and deterioration of the quality of ink-jet paper. In particular, it has been pointed that polyvinyl acetate causes irregularity of a product and has insufficient functions as an ink-jet binder. Disclosure of Invention Technical Problem
[6] It is an object of the present invention, to solve the above problems, to provide a styrene-butadiene latex binder for ink-jet paper containing 0.1 - 1.5 weight parts of ethylenically unsaturated monomer for 100 weight parts of the total monomer and having low surface negative charge density and regular glass transition temperature, and a preparation method of the same.
[7] It is also an object of the present invention to provide a coating liquid for ink-jet paper containing the latex, which has excellent price competitiveness and coating workability and reduces the energy price for drying process.
[8] It is another object of the present invention to provide an ink-jet paper coated with the coating liquid, which has excellent printing quality. Technical Solution
[9] The above object and other objects of the present invention can be achieved by the following embodiments of the present invention.
[10] To achieve the above objects, the present invention provides a styrene-butadiene latex binder for ink-jet paper, which contains 0.1 - 1.5 weight parts of ethylenically unsaturated monomer for 100 weight parts of the total monomer and has glass transition temperature of 20 - 501C.
[11] The present invention also provides a preparation method of the styrene-butadiene latex.
[12] The present invention further provides a coating liquid for ink-jet paper containing
the styrene-butadiene latex.
[13] The present invention also provides an ink-jet paper coated with the coating liquid.
[14] The present invention is described in detail hereinafter.
[15] The present inventors completed this invention by confirming that the use of the styrene-butadiene latex having low surface negative charge density and regular glass transition temperature instead of the high-price polyvinyl acetate, one of the two major materials (polyvinyl alcohol and polyvinyl acetate) for the conventional ink-jet paper binder, has advantages of producing ink-jet paper with excellent printing quality, improvement of coating workability owing to the low viscosity, and reducing drying energy owing to the low water holding capacity.
[16] The styrene-butadiene latex of the present invention is the latex for ink-jet paper binder which contains 0.1 - 1.5 weight parts of ethylenically unsaturated monomer for 100 weight parts of the total monomer and has glass transition temperature of 20 - 5ffC.
[17] The styrene-butadiene latex is prepared by the polymerization of 100 weight parts of monomer mixture comprising 20 - 85 weight parts of styrene monomer, 10 - 70 weight parts of butadiene monomer, 0.5 - 15 weight parts of vinyl cyan monomer, 0.1 - 1.5 weight parts of ethylenically unsaturated monomer and 1 - 25 weight parts of a monomer copolymerizable with the above monomers.
[18] The styrene monomer herein plays a role in regulating hardness and water resistance of the polymerized latex and can be any styrene monomer that has been used for the production of the conventional styrene-butadiene latex.
[19] The butadiene monomer herein gives flexibility to the polymerized latex and can be any butadiene monomer that has been used for the production of the conventional styrene-butadiene latex and preferably 1,3-butadiene.
[20] The ethylenically unsaturated monomer can be unsaturated carboxylic acid or unsaturated polycarboxylic acid alkyl ester having at least one or more carboxylic acid group.
[21] The unsaturated carboxylic acid is preferably one or more compounds selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, crotonic acid, fiαmaric acid and maleic acid.
[22] The unsaturated polycarboxylic acid alkyl ester is preferably one or more compounds selected from the group consisting of itaconic acid monoethyl ester, fiαmaric acid monobutyl ester and maleic acid monobutyl ester.
[23] The ethylenically unsaturated monomer plays a role in maintaining the stability of
particles and changes the latex as anionic. However, owing to its anionic property, this monomer can interact with the cationic additive 'polyD ADMAC that has been generally used for the preparation of a coating liquid for ink-jet paper, resulting in the rapid increase of viscosity. Therefore, the content of this monomer is preferably regulated as minimum in order to maintain the stability of particles, which would be 0.1 - 1.5 weight parts for 100 weight parts of the total monomer.
[24] The vinyl cyan monomer herein is acrylonitrile or methacrylonitrile.
[25] The monomer applicable for the copolymerization is one or more compounds selected from the group consisting of unsaturated carboxylic acid alkyl ester, unsaturated carboxylic acid hydroxyl alkyl ester, unsaturated carboxylic acid amide and its derivatives, and aromatic vinyl monomer.
[26] The unsaturated carboxylic acid alkyl ester is preferably one or more compounds selected from the group consisting of methylacrylate, methylmethacrylate, ethylacrylate and butylacrylate.
[27] The unsaturated carboxylic acid hydroxyl alkyl ester is preferably one or more compounds selected from the group consisting of β-hydroxyethyl acrylate, β- hydroxypropyl acrylate and β-hydroxyethyl methacrylate.
[28] The unsaturated carboxylic acid amide and its derivatives are preferably one or more compounds selected from the group consisting of acrylamide, methacrylamide, it- aconamide, maleic acid monoamide and their derivatives.
[29] The aromatic vinyl monomer is preferably one or more compounds selected from the group consisting of α-methylstyrene, vinyltoluene and p-methylstyrene.
[30] The styrene-butadiene latex binder for ink-jet paper has the particle size of 150 - 300 nm. When the particle size is in the range, viscosity is lowered and thus coating workability is excellent.
[31] The styrene-butadiene latex binder for ink-jet paper has preferably the glass transition temperature of 20 - 50C When the glass transition temperature is in the range, viscosity and water holding capacity are lowered, and thus coating workability is excellent and drying energy is reduced. If the glass transition temperature is lower than the above range, absorption will be observed on the surface of silica having porous structure and a membrane will be formed, resulting in the decrease of pores of the coating layer. On the contrary, if the glass transition temperature is higher than the above range, adhesive force of the coating layer will be reduced.
[32] The preparation method of the styrene-butadiene latex binder for ink-jet paper of the invention is the polymerization of 100 weight parts of monomer mixture comprising
20 - 85 weight parts of styrene monomer, 10 - 70 weight parts of butadiene monomer, 0.5 - 15 weight parts of vinyl cyan monomer, 0.1 - 1.5 weight parts of ethylenically unsaturated monomer and 1 - 25 weight parts of another monomer being able to be co- polymerized with the above monomers.
[33] A chain transfer agent can be additionally included in the polymerization of the styrene-butadiene latex and the preferable amount of the chain transfer agent at this time is 0.1 - 5 weight parts for 100 weight parts of the total monomer.
[34] To regulate the particle size of the styrene-butadiene latex, the conventional styrene- butadiene seed can be used and the content is not limited. The size of the seed is 20 - 100 nm and the content is preferably 1 - 15 weight parts for 100 weight parts of the total monomer.
[35] The styrene-butadiene latex can additionally include additives such as a polymerization initiator, an emulsifying agent and electrolytes.
[36] The chain transfer agent is used to regulate molecular weight of the styrene- butadiene latex, gel content and gel structure, which is exemplified by n-dodecyl mercaptan, t-dodecyl mercaptan, etc.
[37] The coating liquid for ink-jet paper of the invention comprises silica (inorganic pigment), polyvinyl alcohol (binder), the styrene-butadiene latex prepared above and polyDADMAC (cation additive).
[38] The coating liquid is preferably composed of 100 weight parts of silica, 30 - 100 weight parts of the binder and 10 - 20 weight parts of polyDADMAC.
[39] If the content of the binder is up to 100 weight parts, the binder does not reduce the porosity of the coating layer, resulting in the excellent printing quality. If the content of the binder is at least 30 weight parts, binding strength inside of the coating layer will be excellent, resulting in excellent adhesive force and surface strength.
[40] The binder herein is preferably composed of polyvinyl alcohol and the styrene- butadiene latex at the weight ratio of 5:1 - 1:5 (polyvinylalcohol: styrene-butadiene latex).
[41] The ink-jet paper is the paper coated with the above coating liquid.
Best Mode for Carrying Out the Invention
[42] Practical and presently preferred embodiments of the present invention are illustrative as shown in the following Examples.
[43] However, it will be appreciated that those skilled in the art, on consideration of this disclosure, may make modifications and improvements within the spirit and scope of the present invention.
[44]
[45] [Examples]
[46] Example 1
[47] <Preparation of styrene -butadiene latex>
[48] A lO L pressurized reactor equipped with a stirrer, a thermometer, a cooler and a nitrogen gas inlet and designed for the continuous addition of a monomer, an emulsifying agent and a polymerization initiator was filled with nitrogen. To the reactor were added 22 weight parts of butadiene, 62 weight parts of styrene, 10 weight parts of methylmethacrylate, 5 weight parts of acrylonitrile, 1 weight part of methyl- methacrylic acid, 3.5 weight parts of styrene-butadiene seed (prepared by emulsion polymerization of 75 weight% of styrene and 25 weight% of butadiene), 0.5 weight part of dodecyl benzene sodium sulfonate, 0.3 weight part of t-dodecylmercaptan, 0.4 weight part of sodium hydrogen carbonate and 105 weight parts of ion exchange water, for 100 weight parts of the total monomer, and then temperature of the reactor was raised to 825C. 0.8 weight part of potassium persulfate was added thereto as a polymerization initiator, followed by stirring for approximately 300 minutes to polymerize the styrene-butadiene latex.
[49] <Preparation of coating liquid for ink-jet paper>
[50] 100 weight parts of silica, 30 weight parts of polyvinyl alcohol, 30 weight parts of the styrene-butadiene latex prepared above, 10 weight parts of a cation additive (polyD ADMAC) and 1,050 weight parts of ion exchange water were mixed to prepare the coating liquid for ink-jet paper.
[51] <Preparation of ink-jet paper>
[52] The base paper (72 gsm) was coated with the coating liquid prepared above by 8 g/ m2, which was dried in a 1301C oven for 20 seconds, followed by calendering at 4(JQ 100 kgf/cm to prepare the ink-jet paper.
[53] Example 2
[54] The styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that the amount of styrene- butadiene seed was adjusted to 1.5 weight parts to regulate the particle size.
[55] Example 3
[56] The styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 18 weight parts and styrene was added by 66 weight parts to regulate the glass transition temperature.
[57] Example 4
[58] The styrene -butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 18 weight parts, styrene was added by 66 weight parts, and styrene-butadiene seed was added by 1.5 weight parts to regulate the particle size and the glass transition temperature.
[59] Comparative Example 1
[60] The coating liquid and the ink-jet paper were prepared by using the conventional polyvinyl acetate commercialized for ink-jet paper instead of the styrene-butadiene latex prepared in example 1.
[61] Comparative Example 2
[62] The styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 31 weight parts and styrene was added by 53 weight parts to compare the glass transition temperature.
[63] Comparative Example 3
[64] The styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 31 weight parts, styrene was added by 53 weight parts and styrene-butadiene seed was added by 13 weight parts to compare the particle size and the glass transition temperature.
[65] Comparative Example 4
[66] The styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 1 except that butadiene was added by 38 weight parts, styrene was added by 46 weight parts, itaconic acid was added by 3.5 weight parts, styrene-butadiene seed was added by 13 weight parts and dodecyl benzene sodium sulfonate was added by 0.25 weight part to compare the surface negative charge density.
[67] Comparative Example 5
[68] The styrene-butadiene latex, the coating liquid and the ink-jet paper were prepared by the same manner as described in example 4 except that butadiene was added by 25 weight parts, styrene was added by 59 weight parts, itaconic acid was added by 2.4 weight parts and styrene-butadiene seed was added by 8.5 weight parts to compare the surface negative charge density and the particle size.
[69] [Experimental Examplel
[70] <Phvsical properties of styrene-butadiene latex> [71] Physical properties of the styrene-butadiene latexes prepared in examples and comparative examples were examined and the results are shown in Table 1.
[72] *Particle size - measured by Laser Scattering Analyzer (Nicomp). [73] *Glass transition temperature measured by Differential Scanning Calorimeter (TA) in the presence of nitrogen with raising the temperature by 20OnHn.
[74] *Surface negative charge density measured by Particle Charge Detector (Mutek). [75] Table 1 [Table 1]
[76] As shown in table 1, the styrene-butadiene latexes (examples 1 - 4) prepared by using a small amount of ethylenically unsaturated monomer of the invention exhibited low surface negative charge density, while the latexes (comparative examples 4 - 5) prepared by using a over-dose of ethylenically unsaturated monomer showed significantly high surface negative charge density.
[77] <Phvsical properties of coating liquid for ink-iet paper> [78] Physical properties of the coating liquid prepared above were measured by followings and the results are shown in Table 2.
[79] * Viscosity - measured by Brookfield Viscometer with spindle #3 at 60 rpm. [80] *Water holding capacity - measured by AA-GWR under the condition of 2.0 bar for 60 sec.
[81] Table 2 [Table 2]
[83] The coating liquids of comparative examples 2 - 3 which contained such styrene- butadiene latex that has the glass transition temperature out of the acceptable range determined by the present invention and the coating liquids of comparative examples 4 - 5 which contained such styrene-butadiene latex having the high surface negative charge density resulted from the overdose of ethylenically unsaturated monomer were confirmed to have significantly increased water holding capacity.
[84] <Physical properties of ink-jet paper>
[85] Physical properties of the ink-jet paper prepared above were measured by followings after printing with an ink-jet printer (Epson Stylus 830) and the results are shown in Table 3.
[86] * Whiteness - measured by Elrepho spectrophotometer (L&W, TAPPI test method
T452om-98).
[87] *Opacity - measured by Elrepho spectrophotometer (L&W, TAPPI test method
T519om-96).
[88] *Gloss - measured by Gloss meter (L&W, TAPPI test method T480om-99).
[89] *Roundness - measured by Image-pro plus 4.1, an image analyzing program.
[90] *Color density - measured by Macbeth Ink Densitometer D19C.
[91] * Water fastness - Color density of the printed coating paper was measured. Then, the paper was dipped in distilled water for one hour and dried completely, followed by measuring the color density again. The degree of color density measured after one hour water soaking was presented by % for the primary color density.
[92] *Surface strength - measured by IGT tester.
[93] Table 3
[Table 3]
[94] As shown in Table 3, the ink-jet papers prepared in examples 1 - 4 of the invention which contained polyvinyl acetate exhibited as excellent color density and whiteness as the ink-jet paper prepared in comparative example 1 and better water fastness and surface strength.
[95] The ink-jet papers of comparative examples 2 - 5 which contained such styrene- butadiene latex that has the glass transition temperature, particle size and the surface negative charge density out of the acceptable range determined by the present invention exhibited significantly low surface strength and water fastness.
Industrial Applicability
[96] As explained hereinbefore, the styrene-butadiene latex binder for ink-jet paper of the present invention has excellent price competitiveness, low surface negative charge density, and regular glass transition temperature, resulting in increase of coating workability and decrease of energy cost for drying process during the production of the coating liquid for ink-jet paper and thereby can provide the ink-jet paper with excellent printing quality. The present invention also provides a preparation method of the styrene-butadiene latex.
[97] [98] Those skilled in the art will appreciate that the conceptions and specific embodiments disclosed in the foregoing description may be readily utilized as a basis for
modifying or designing other embodiments for carrying out the same purposes of the present invention. Those skilled in the art will also appreciate that such equivalent embodiments do not depart from the spirit and scope of the invention as set forth in the appended claims.
Claims
[1] A styrene -butadiene latex binder for ink-jet paper comprising 0.1 - 1.5 weight parts of ethylenically unsaturated monomer for 100 weight parts of the total monomer and having the glass transition temperature of 20 - 501C.
[2] The styrene-butadiene latex binder for ink-jet paper according to claim 1, wherein the styrene-butadiene latex is comprised of 20 - 85 weight parts of styrene monomer, 10 - 70 weight parts of butadiene monomer, 0.5 - 15 weight parts of vinyl cyan monomer, 0.1 - 1.5 weight parts of ethylenically unsaturated monomer and 1 - 25 weight parts of a monomer copolymerizable with the above monomers.
[3] The styrene-butadiene latex binder for ink-jet paper according to claim 1, wherein the ethylenically unsaturated monomer is one or more compounds selected from the group consisting of unsaturated carboxylic acid and unsaturated polycarboxylic acid alkyl ester having at least one carboxylic group.
[4] The styrene-butadiene latex binder for ink-jet paper according to claim 1, wherein the styrene-butadiene latex is prepared from a styrene-butadiene seed having the particle size of 20 - 100 nm of 1 - 15 weight parts for 100 weight parts of the total monomer.
[5] The styrene-butadiene latex binder for ink-jet paper according to claim 1, wherein the styrene-butadiene latex has the particle size of 150 - 300 nm.
[6] The styrene-butadiene latex binder for ink-jet paper according to claim 1, wherein the styrene-butadiene latex has the surface negative charge density of 50 - 200 μeq/g.
[7] A coating liquid for ink-jet paper comprising anyane of the styrene-butadiene latex binders for ink-jet paper of claim 1 - claim 6.
[8] The coating liquid for ink-jet paper according to claim 7, wherein the coating liquid comprises styrene-butadiene latex binder for ink-jet paper and polyvinyl alcohol, as a binder, silica as an inorganic pigment and polyD ADMAC as a cation additive.
[9] The coating liquid for ink-jet paper according to claim 8, wherein the binder is included by 20 - 100 weight parts and polyDADMAC is included by 10 - 20 weight parts for 100 weight parts of the silica.
[10] The coating liquid for ink-jet paper according to claim 8, wherein the weight ratio of the styrene-butadiene latex binder for ink-jet paper to the polyvinyl
alcohol is 5:1 - 1:5.
[11] The coating liquid for ink-jet paper according to claim 8, wherein the viscosity of the coating liquid for ink-jet paper is 10 - 300 cPs.
[12] The coating liquid for ink-jet paper according to claim 8, wherein the water holding capacity of the coating liquid is 50 - 1000 g/m2.
[13] An ink-jet paper treated with the coating liquid of claim 7.
[14] A preparation method of a styrene-butadiene latex binder for ink-jet paper, which is prepared by polymerization of 20 - 85 weight parts of styrene monomer, 10 - 70 weight parts of butadiene monomer, 0.5 - 15 weight parts of vinyl cyan monomer, 0.1 - 1.5 weight parts of ethylenically unsaturated monomer and 1 - 25 weight parts of a monomer copolymerizable with the above monomers, for 100 weight parts of the total monomer.
[15] The preparation method of a styrene-butadiene latex binder for ink-jet paper according to claim 14, wherein the ethylenically unsaturated monomer is one or more compounds selected from the group consisting of unsaturated carboxylic acid and unsaturated polycarboxylic acid alkyl ester having at least one carboxylic group.
[16] The preparation method of a styrene-butadiene latex binder for ink-jet paper according to claim 14, further comprising a chain transfer agent of 0.1 - 5 weight parts for 100 weight parts of the total monomer.
[17] The preparation method of a styrene-butadiene latex binder for ink-jet paper according to claim 14, wherein a styrene-butadiene latex seed having the particle size of 20 - 100 nm is further added by 1 - 15 weight parts for 100 weight parts of the total monomer for the polymerization.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/517,917 US8053045B2 (en) | 2006-12-07 | 2007-12-04 | Styrene-butadiene latex binder for ink-jet paper, preparation method thereof and coating liquid containing the same |
| JP2009540144A JP5129264B2 (en) | 2006-12-07 | 2007-12-04 | Styrene-butadiene latex binder for inkjet paper, method for producing the same, and coating liquid containing the same |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20060123759 | 2006-12-07 | ||
| KR10-2006-0123759 | 2006-12-07 | ||
| KR1020070111484A KR101041304B1 (en) | 2006-12-07 | 2007-11-02 | Styrene-butadiene latex binder for ink-jet paper, preparation method thereof and coating liquid containing the same |
| KR10-2007-0111484 | 2007-11-02 |
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| Publication Number | Publication Date |
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| WO2008069538A1 true WO2008069538A1 (en) | 2008-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2007/006229 WO2008069538A1 (en) | 2006-12-07 | 2007-12-04 | Styrene-butadiene latex binder for ink-jet paper, preparation method thereof and coating liquid containing the same |
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| Country | Link |
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| WO (1) | WO2008069538A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124958A1 (en) * | 2010-04-07 | 2011-10-13 | Coatex S.A.S. | Use of a latex of styrene particles with a size of 100 nm as rheological agent in a coating slip for papermaking, coating slip and method for obtaining a paper coated with this slip |
| CN103980428A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | Acrylonitrile-butadiene-styrene (ABS) powder for 3D printing and preparation method thereof |
| CN103980429A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | Acrylonitrile-butadiene-styrene (ABS) powder with dual-binary particle size distribution for 3D printing and preparation method thereof |
| CN104861857A (en) * | 2015-06-16 | 2015-08-26 | 华东理工大学 | Method for preparing environment-friendly synthetic paper ink-jet printing coating |
| CN105738402A (en) * | 2014-12-11 | 2016-07-06 | 中国石油天然气股份有限公司 | Detection method of glass-transition temperature of rubber latex |
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