JP4527281B2 - 水性顔料分散液、その製法およびそれを含有してなる水性インキ - Google Patents
水性顔料分散液、その製法およびそれを含有してなる水性インキ Download PDFInfo
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- JP4527281B2 JP4527281B2 JP2000543521A JP2000543521A JP4527281B2 JP 4527281 B2 JP4527281 B2 JP 4527281B2 JP 2000543521 A JP2000543521 A JP 2000543521A JP 2000543521 A JP2000543521 A JP 2000543521A JP 4527281 B2 JP4527281 B2 JP 4527281B2
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- Prior art keywords
- pigment
- dispersion
- thermoplastic resin
- water
- aqueous
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 1
- 229940092714 benzenesulfonic acid Drugs 0.000 description 1
- MYONAGGJKCJOBT-UHFFFAOYSA-N benzimidazol-2-one Chemical compound C1=CC=CC2=NC(=O)N=C21 MYONAGGJKCJOBT-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 1
- 229940043276 diisopropanolamine Drugs 0.000 description 1
- 229940043279 diisopropylamine Drugs 0.000 description 1
- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- VYXSBFYARXAAKO-UHFFFAOYSA-N ethyl 2-[3-(ethylamino)-6-ethylimino-2,7-dimethylxanthen-9-yl]benzoate;hydron;chloride Chemical compound [Cl-].C1=2C=C(C)C(NCC)=CC=2OC2=CC(=[NH+]CC)C(C)=CC2=C1C1=CC=CC=C1C(=O)OCC VYXSBFYARXAAKO-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 229930182830 galactose Natural products 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 125000003010 ionic group Chemical group 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 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
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 239000000845 maltitol Substances 0.000 description 1
- VQHSOMBJVWLPSR-WUJBLJFYSA-N maltitol Chemical compound OC[C@H](O)[C@@H](O)[C@@H]([C@H](O)CO)O[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O VQHSOMBJVWLPSR-WUJBLJFYSA-N 0.000 description 1
- 235000010449 maltitol Nutrition 0.000 description 1
- 229940035436 maltitol Drugs 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- NYGZLYXAPMMJTE-UHFFFAOYSA-M metanil yellow Chemical group [Na+].[O-]S(=O)(=O)C1=CC=CC(N=NC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 NYGZLYXAPMMJTE-UHFFFAOYSA-M 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- NBQNPNAHCVGAAM-UHFFFAOYSA-N morpholine;sodium Chemical compound [Na].C1COCCN1 NBQNPNAHCVGAAM-UHFFFAOYSA-N 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229940110337 pigment blue 1 Drugs 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-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
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000004846 water-soluble epoxy resin Substances 0.000 description 1
Classifications
-
- 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
- C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
- C09D11/326—Inkjet printing inks characterised by colouring agents containing carbon black characterised by the pigment dispersant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
- C08J3/212—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase and solid additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/006—Preparation of organic pigments
- C09B67/0066—Aqueous dispersions of pigments containing only dispersing agents
-
- 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
- C09D11/16—Writing inks
-
- 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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Description
水可溶性または自己乳化性のカルボキシル基含有熱可塑性樹脂で顔料を分散させてなる分散液であって、顔料とカルボキシル基含有熱可塑性樹脂との割合(顔料/カルボキシル基含有熱可塑性樹脂(有効固形分重量比))が10/10〜10/1であり、顔料を分散させたのちにカルボキシル基含有熱可塑性樹脂が架橋剤にて架橋し、架橋剤とカルボキシル基含有熱可塑性樹脂との割合(架橋剤/カルボキシル基含有熱可塑性樹脂(有効固形分重量比))が1/100〜50/100であることを特徴とする水性顔料分散液;
(1)顔料と水可溶性または自己乳化性のカルボキシル基含有熱可塑性樹脂とを予備分散させ、混合物を調製する工程、
(2)前記混合物を分散機にて処理し、カルボキシル基含有熱可塑性樹脂で顔料を分散させて分散液を調製する工程、
(3)前記分散液中のカルボキシル基含有熱可塑性樹脂を架橋剤にて架橋させる工程および
(4)顔料および架橋したカルボキシル基含有熱可塑性樹脂を含む分散液のpHをアルカリ側に調整する工程
からなることを特徴とし、架橋反応終了時のpHが6.0〜8.0の範囲である前記水性顔料分散液の製法;ならびに
前記水性顔料分散液を含有してなる水性インキ
に関する。
(予備分散工程)
以下に示す成分を配合し、ニーダーにて室温で1時間混練して予備分散させ、混合物を調製した。
成 分 量(重量部(以下、部という))
黄顔料 65
(ピグメント・イエロー14(C.I.21095))
スチレン−アクリル酸共重合体 30
(スチレン/アクリル酸(重量比)=88/12、酸価94、数平均分子量12000)
エチレングリコール 5
前記のようにして予備分散および中和してえられた混合物に対し、0.7mm径ガラスビーズを80%充填したサンドミルにて3パス処理を行ない、スチレン−アクリル酸共重合体で黄顔料を微分散させて分散液を調製した。
前記pH7.0の分散液に30%水溶性カルボジイミド樹脂(カルボジイミド当量300)5部を添加し、90℃で5時間撹拌して分散液中のスチレン−アクリル酸共重合体を架橋させ(架橋したスチレン−アクリル酸共重合体のゲル分率:40%、数平均分子量:500000)、架橋スチレン−アクリル酸共重合体を黄顔料に強固に吸着させた。架橋反応終了時の分散液のpHは6.8であった。
前記黄顔料およびこれに強固に吸着した架橋スチレン−アクリル酸共重合体を含む分散液に、トリエタノールアミンを0.3重量%の割合で添加し、分散液のpHを8.7に調整した。
水性顔料分散液をケント紙にバーコータ#10で塗工し、120℃で10分間乾燥させたものを試験片とした。
前記(イ)耐光性試験で作成したものと同じ試験片を用い、これを水中に1分間浸漬させて顔料の溶出の有無を確認した。
前記(イ)耐光性試験で作成したものと同じ試験片を用い、これを1%水酸化ナトリウム溶液中に1分間浸漬させて顔料の溶出の有無を確認した。
前記(イ)耐光性試験で作成したものと同じ試験片を用い、これを10%メチルエチルケトン溶液中に1分間浸漬させて顔料の溶出の有無を確認した。
水性顔料分散液を20℃の恒温室内に1カ月間静置したのち、顔料の分離、水浮きおよび沈降の有無を確認した。顔料の分離、水浮きまたは沈降が少しでも生じた状態を異常と評価した。
実施例1において、スチレン−アクリル酸共重合体のかわりにカルボキシル基を含まない水溶性エポキシ樹脂を用いて架橋処理工程を行なわずに、pH7.0の分散液にトリエタノールアミンを添加したほかは実施例1と同様にして黄色水性顔料分散液をえた。
(予備分散工程)
以下に示す成分を配合し、ニーダーにて室温で1時間混練して予備分散させ、混合物を調製した。
成 分 量(部)
赤顔料 70
(ピグメント・レッド22(C.I.12315))
スチレン−α−メチルスチレン−
アクリル酸共重合体 28
(スチレン/α−メチルスチレン/アクリル酸(重量比)=40/30/30、酸価234、数平均分子量9000)
グリセリン 2
前記のようにして予備分散および中和してえられた混合物に対し、0.5mm径ジルコニアビーズを80%充填したサンドミルにて3パス処理を行ない、スチレン−α−メチルスチレン−アクリル酸共重合体で赤顔料を微分散させて分散液を調製した。
前記pH6.5の分散液に30%水溶性カルボジイミド樹脂(カルボジイミド当量300)5部を添加し、80℃で7時間撹拌して分散液中のスチレン−α−メチルスチレン−アクリル酸共重合体を架橋させ(架橋したスチレン−α−メチルスチレン−アクリル酸共重合体のゲル分率:70%、数平均分子量:800000)、架橋スチレン−α−メチルスチレン−アクリル酸共重合体を赤顔料に強固に吸着させた。架橋反応終了時の分散液のpHは6.4であった。
前記赤顔料およびこれに強固に吸着した架橋スチレン−α−メチルスチレン−アクリル酸共重合体を含む分散液に、アンモニア水を0.5重量%の割合で添加し、分散液のpHを9.2に調整した。
実施例2において、架橋処理工程前のpH調整を行なわずに、サンドミルにて3パス処理を行なってえられた分散液に直接カルボジイミド樹脂を添加し、架橋反応終了時の分散液のpHが8.2であったほかは実施例2と同様にして赤色水性顔料分散液をえた。
(予備分散工程)
以下に示す成分を配合し、バタフライミキサーにて室温で5時間混練して予備分散させ、混合物を調製した。
成 分 量(部)
青顔料 40.0
(ピグメント・ブルー15:1(C.I.74160))
スチレン−マレイン酸共重合体 7.0
(スチレン/マレイン酸(重量比)=60/40、酸価190、数平均分子量3000)
エチレングリコール 5.0
ジエチルアミン 2.5
イオン交換水 45.5
前記のようにして予備分散および中和してえられた混合物に対し、1.0mm径ガラスビーズを80%充填したサンドミルにて5パス処理を行ない、スチレン−マレイン酸共重合体で青顔料を微分散させて分散液を調製した。
前記pH7.2の分散液に35%水溶性オキサゾリン基含有樹脂(オキサゾリン当量200)5部を添加し、90℃で3.5時間撹拌して分散液中のスチレン−マレイン酸共重合体を架橋させ(架橋したスチレン−マレイン酸共重合体のゲル分率:50%、数平均分子量:550000)、架橋スチレン−マレイン酸共重合体を青顔料に強固に吸着させた。架橋反応終了時の分散液のpHは7.0であった。
前記青顔料およびこれに強固に吸着した架橋スチレン−マレイン酸共重合体を含む分散液に、N−メチル−ジエタノールアミンを0.3重量%の割合で添加し、分散液のpHを9.5に調整した。
実施例3において、バタフライミキサーでの予備分散工程を行なわずに、各成分を混合して混合物としたほかは実施例3と同様にして青色水性顔料分散液をえた。
(予備分散工程)
以下に示す成分を配合し、バタフライミキサーにて室温で4時間混練して予備分散させ、混合物を調製した。
成 分 量(部)
緑顔料 35.0
(ピグメント・グリーン7(C.I.74260))
スチレン−メタクリル酸共重合体 8.5
(スチレン/メタクリル酸(重量比)=78/22、酸価170、数平均分子量8500)
ジエチレングリコール 10.0
イソプロピルアミン 2.0
イオン交換水 43.5
前記のようにして予備分散および中和してえられた混合物に対し、0.5mm径ジルコニアビーズを80%充填したサンドミルにて3パス処理を行ない、スチレン−メタクリル酸共重合体で緑顔料を微分散させて分散液を調製した(pH8.2)。
前記pH8.2の分散液に100%水溶性ポリオキシエチレンオリゴエステルアクリレート(1分子あたり2官能)5部を添加し、85℃で8時間撹拌して分散液中のスチレン−メタクリル酸共重合体を架橋させ(架橋したスチレン−メタクリル酸共重合体のゲル分率:60%、数平均分子量:700000)、架橋スチレン−メタクリル酸共重合体を緑顔料に強固に吸着させた。架橋反応終了時の分散液のpHは7.5であった。
前記緑顔料およびこれに強固に吸着した架橋スチレン−メタクリル酸共重合体を含む分散液に、トリエタノールアミンを0.3重量%の割合で添加し、分散液のpHを9.1に調整した。
実施例4において、pH調整工程を行なわずに、緑顔料およびこれに吸着している架橋スチレン−メタクリル酸共重合体を含むpH7.0の分散液を直接遠心分離したほかは実施例4と同様にして緑色水性顔料分散液をえた。
Claims (3)
- (1)顔料と水可溶性または自己乳化性のカルボキシル基含有熱可塑性樹脂とを予備分散させ、混合物を調製する工程、
(2)前記混合物を分散機にて処理し、カルボキシル基含有熱可塑性樹脂で顔料を分散させて分散液を調製する工程、
(3)前記分散液中のカルボキシル基含有熱可塑性樹脂を架橋剤にて架橋させる工程および
(4)顔料および架橋したカルボキシル基含有熱可塑性樹脂を含む分散液のpHをアルカリ側に調整する工程
からなることを特徴とし、架橋反応終了時のpHが6.0〜8.0の範囲である、
水可溶性または自己乳化性のカルボキシル基含有熱可塑性樹脂で顔料を分散させてなる分散液であって、顔料とカルボキシル基含有熱可塑性樹脂との割合(顔料/カルボキシル基含有熱可塑性樹脂(有効固形分重量比))が10/10〜10/1であり、顔料を分散させたのちにカルボキシル基含有熱可塑性樹脂が架橋剤にて架橋し、架橋剤とカルボキシル基含有熱可塑性樹脂との割合(架橋剤/カルボキシル基含有熱可塑性樹脂(有効固形分重量比))が1/100〜50/100であることを特徴とする水性顔料分散液の製法。 - 請求項1記載の製法により得られる水性顔料分散液。
- 請求項2記載の水性顔料分散液を含有してなる水性インキ。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10441798 | 1998-04-15 | ||
| JP10-104417 | 1998-04-15 | ||
| PCT/JP1999/001954 WO1999052966A1 (en) | 1998-04-15 | 1999-04-13 | Aqueous pigment dispersion, process for producing the same, and water-based ink comprising the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPWO1999052966A1 JPWO1999052966A1 (ja) | 2002-10-29 |
| JP4527281B2 true JP4527281B2 (ja) | 2010-08-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000543521A Expired - Lifetime JP4527281B2 (ja) | 1998-04-15 | 1999-04-13 | 水性顔料分散液、その製法およびそれを含有してなる水性インキ |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7008994B1 (ja) |
| EP (1) | EP1086975B1 (ja) |
| JP (1) | JP4527281B2 (ja) |
| DE (1) | DE69932052T2 (ja) |
| WO (1) | WO1999052966A1 (ja) |
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- 1999-04-13 US US09/673,194 patent/US7008994B1/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| DE69932052D1 (de) | 2006-08-03 |
| EP1086975A1 (en) | 2001-03-28 |
| US7008994B1 (en) | 2006-03-07 |
| WO1999052966A1 (en) | 1999-10-21 |
| DE69932052T2 (de) | 2006-11-09 |
| EP1086975A4 (en) | 2003-05-28 |
| EP1086975B1 (en) | 2006-06-21 |
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