WO2014002854A1 - Resin composition for toner, toner, developer and image forming apparatus - Google Patents
Resin composition for toner, toner, developer and image forming apparatus Download PDFInfo
- Publication number
- WO2014002854A1 WO2014002854A1 PCT/JP2013/066898 JP2013066898W WO2014002854A1 WO 2014002854 A1 WO2014002854 A1 WO 2014002854A1 JP 2013066898 W JP2013066898 W JP 2013066898W WO 2014002854 A1 WO2014002854 A1 WO 2014002854A1
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- WIPO (PCT)
- Prior art keywords
- toner
- mass
- resin
- parts
- masterbatch
- Prior art date
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- 239000011342 resin composition Substances 0.000 title claims abstract description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 93
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- 239000004645 polyester resin Substances 0.000 claims abstract description 62
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- 229920006038 crystalline resin Polymers 0.000 claims description 16
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- -1 aliphatic alcohols Chemical class 0.000 description 75
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 60
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- 238000004519 manufacturing process Methods 0.000 description 48
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 7
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- 230000003993 interaction Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 1
- LDHBWEYLDHLIBQ-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide;hydrate Chemical compound O.[OH-].[O-2].[Fe+3] LDHBWEYLDHLIBQ-UHFFFAOYSA-M 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229940107698 malachite green Drugs 0.000 description 1
- FDZZZRQASAIRJF-UHFFFAOYSA-M malachite green Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](C)C)C=C1 FDZZZRQASAIRJF-UHFFFAOYSA-M 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 1
- 239000000434 metal complex dye Substances 0.000 description 1
- VHRYZQNGTZXDNX-UHFFFAOYSA-N methacryloyl chloride Chemical compound CC(=C)C(Cl)=O VHRYZQNGTZXDNX-UHFFFAOYSA-N 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
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- 238000005065 mining Methods 0.000 description 1
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- 239000011733 molybdenum Substances 0.000 description 1
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical compound O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 1
- 239000012170 montan wax Substances 0.000 description 1
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 description 1
- VENDXQNWODZJGB-UHFFFAOYSA-N n-(4-amino-5-methoxy-2-methylphenyl)benzamide Chemical compound C1=C(N)C(OC)=CC(NC(=O)C=2C=CC=CC=2)=C1C VENDXQNWODZJGB-UHFFFAOYSA-N 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- WRYWBRATLBWSSG-UHFFFAOYSA-N naphthalene-1,2,4-tricarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC(C(O)=O)=C21 WRYWBRATLBWSSG-UHFFFAOYSA-N 0.000 description 1
- LATKICLYWYUXCN-UHFFFAOYSA-N naphthalene-1,3,6-tricarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC2=CC(C(=O)O)=CC=C21 LATKICLYWYUXCN-UHFFFAOYSA-N 0.000 description 1
- CTIQLGJVGNGFEW-UHFFFAOYSA-L naphthol yellow S Chemical compound [Na+].[Na+].C1=C(S([O-])(=O)=O)C=C2C([O-])=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 CTIQLGJVGNGFEW-UHFFFAOYSA-L 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- WDAISVDZHKFVQP-UHFFFAOYSA-N octane-1,2,7,8-tetracarboxylic acid Chemical compound OC(=O)CC(C(O)=O)CCCCC(C(O)=O)CC(O)=O WDAISVDZHKFVQP-UHFFFAOYSA-N 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000002891 organic anions Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- WOTPFVNWMLFMFW-ISLYRVAYSA-N para red Chemical compound OC1=CC=C2C=CC=CC2=C1\N=N\C1=CC=C(N(=O)=O)C=C1 WOTPFVNWMLFMFW-ISLYRVAYSA-N 0.000 description 1
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- JGTNAGYHADQMCM-UHFFFAOYSA-N perfluorobutanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F JGTNAGYHADQMCM-UHFFFAOYSA-N 0.000 description 1
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- 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
- 239000012169 petroleum derived wax Substances 0.000 description 1
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- 239000005011 phenolic resin Substances 0.000 description 1
- 150000004986 phenylenediamines Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 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
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920006350 polyacrylonitrile resin Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 229920000131 polyvinylidene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- OSIVISXRDMXJQR-UHFFFAOYSA-M potassium;2-[ethyl(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluorooctylsulfonyl)amino]acetate Chemical compound [K+].[O-]C(=O)CN(CC)S(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F OSIVISXRDMXJQR-UHFFFAOYSA-M 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- GHJOIQFPDMIKHT-UHFFFAOYSA-N propane-1,2,3-triol;prop-2-enoic acid Chemical compound OC(=O)C=C.OCC(O)CO GHJOIQFPDMIKHT-UHFFFAOYSA-N 0.000 description 1
- KCXFHTAICRTXLI-UHFFFAOYSA-M propane-1-sulfonate Chemical compound CCCS([O-])(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-M 0.000 description 1
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- 239000010453 quartz Substances 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 235000012752 quinoline yellow Nutrition 0.000 description 1
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- 239000004172 quinoline yellow Substances 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
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- 239000001022 rhodamine dye Substances 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- 229910000275 saponite Inorganic materials 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 229910000269 smectite group Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229940070720 stearalkonium Drugs 0.000 description 1
- 125000005502 stearalkonium group Chemical group 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- IHBMMJGTJFPEQY-UHFFFAOYSA-N sulfanylidene(sulfanylidenestibanylsulfanyl)stibane Chemical compound S=[Sb]S[Sb]=S IHBMMJGTJFPEQY-UHFFFAOYSA-N 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000001757 thermogravimetry curve Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000004992 toluidines Chemical class 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 229960001124 trientine Drugs 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 150000004961 triphenylmethanes Chemical class 0.000 description 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 description 1
- 150000003658 tungsten compounds Chemical class 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08726—Polymers of unsaturated acids or derivatives thereof
- G03G9/08733—Polymers of unsaturated polycarboxylic acids
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08742—Binders for toner particles comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08755—Polyesters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
- G03G9/08795—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
- G03G9/08797—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature
Definitions
- the present invention relates to a resin composition for a toner, a toner, a developer and an image forming apparatus.
- Patent Literature 1 For example a method of uniformly dispersing the pigment inside the toner using a pigment dispersant is employed.
- Patent Literature 1 had a problem of insufficient low-temperature fixing property and heat-resistant storage stability.
- the present invention aims at providing a resin
- composition for a toner for producing a toner having superior pigment dispersibility and having superior low-temperature fixing property and heat-resistant storage stability.
- the present invention provides a resin composition for a toner, wherein the resin composition for a toner includes a polyester resin and a colorant, and
- polyester resin has A(10) - A(l80) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25°C for 10 minutes, and A(l80) (%) is the transmittance after the mixture is left to stand for 3 hours.
- a resin composition for a toner for producing a toner having superior pigment dispersibility and superior low temperature fixing property and heat-resistant storage stability may be provided.
- FIG. 1 is a schematic configuration diagram illustrating one example of a process cartridge of an image forming apparatus which uses a toner of the present embodiment.
- FIG. 2 is a schematic configuration diagram illustrating one example of an image forming apparatus of the present embodiment.
- a resin composition for a toner of the present invention includes a polyester resin and a colorant.
- the polyester resin has A(10) - A(l80) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25°C for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours.
- the resin composition for a toner of the present invention may be used, for example, as a masterbatch of a toner. Also, the polyester resin included in the resin composition for a toner may be used as a resin for a masterbatch of the toner.
- a toner of the present invention includes a first polyester resin and a colorant.
- the first polyester resin has A(10) - A(180) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25°C for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours.
- the resin for a masterbatch a resin which has solubility in ethyl acetate varying over time under a condition explained below is used.
- the condition is A(10) - A(180) of 70 or greater, where A(10) ( ) is a transmittance of light having a wavelength of 500 nm measured by a spectrophotometer through a mixture of 20 parts by mass of powder of the resin for a masterbatch added to 80 parts by mass of ethyl acetate and stirred at 25°C using a magnetic stirrer for 10 minutes, and A(l80) (%) is the transmittance after the mixture is left to stand for 3 hours.
- polyester resin having a small temporal variation in transmittance and having A(10) - A(l80) of less than 70 There are two possibilities for a polyester resin having a small temporal variation in transmittance and having A(10) - A(l80) of less than 70. That is, high solubility in ethyl acetate is maintained over time, or low solubility is maintained over time.
- the colorant e.g. lake pigment
- the colorant e.g. lake pigment
- the binder resin and the colorant separate in the toner material solution.
- the colorant forms a domain such as sea- island structure inside the toner particles, which may result in degraded dispersibility of the colorant.
- the obtained toner has degraded color saturation or degree of coloration, and there are cases sufficient hue cannot be obtained.
- polyester resin which satisfies conditions of A(10) of 90 (%) or greater and A(180) of 10 (%) or less is more preferable.
- the resins for a masterbatch which satisfy the above- described condition, it is preferable to use a polyester resin, and it is preferable to use aliphatic alcohols and aromatic carboxylic acids (e.g. terephthalic acid) as monomers of the polyester resin.
- aliphatic alcohols and terephthalic acid By using the aliphatic alcohols and terephthalic acid as the monomers, it is possible to obtain a toner having appropriate thermal properties, superior low- temperature fixing property and heat-resistant storage stability and favorable pigment dispersibility.
- the polyester resin used preferably has a glass transition temperature (Tg) of 55°C or greater.
- Tg glass transition temperature
- the aliphatic alcohols are not particularly restricted.
- propylene glycol or 1,3-propanediol is preferably used.
- a mixing ratio affects solubility of the resin for a masterbatch in a solvent (ethyl acetate).
- a molar ratio of propylene glycol with respect to a total amount of propylene glycol and 1,3-propanediol is preferably 65% to 85%.
- the resin for a masterbatch has increased solubility and the transmittance of
- the molar ratio of propylene glycol is below 65%, the resin for a masterbatch has decreased solubility and the transmittance of constantly 10% or less, which may result in domain formation of the colorant inside the toner.
- a divalent carboxylic acid used as a monomer of the polyester resin is preferably a monomer (aromatic carboxylic acid) having a rigid skeleton so that the toner to be obtained has sufficient thermal
- terephthalic acid and/or isophthalic acid it is preferable to use terephthalic acid and/or isophthalic acid, and it is more preferable to use terephthalic acid and isophthalic acid in combination.
- terephthalic acid and isophthalic acid it is preferable to use terephthalic acid and isophthalic acid in combination.
- solubility of the resin for a masterbatch increases with a higher ratio of isophthalic acid. That is, solubility of the resin for a masterbatch may be appropriately adjusted by those skilled in the art by varying a composition of the alcohol monomer and by varying a composition of the acid monomer.
- the transmittance in the present invention may be measured by the above-described method, for example, using a spectrophotometer (JASCO V660).
- the colorant is not particularly restricted, and it may be appropriately selected from heretofore known pigments and dyes according to purpose.
- the colorant include carbon black, nigrosine dye, iron black, naphthol yellow S, Hansa Yellow (10G, 5G, G), cadmium yellow, yellow iron oxide, yellow ocher, chrome yellow, titanium yellow, polyazo yellow, Oil Yellow, Hansa Yellow (GR, A, RN, R), Pigment Yellow L, Benzidine Yellow (G, GR), Permanent Yellow (NCG), Vulcan Fast Yellow (5G, R), tartrazine lake, Quinoline Yellow Lake, Anthrazane Yellow BGL, Isoindolinone Yellow, colcothar, red lead, lead vermilion, cadmium red, Cadmium Mercury Red, antimony vermilion, Permanent Red 4R, Para Red, fiser red, para-chloro-ortho-nitroaniline red, Lithol Fast Scarlet G, Brilliant Fast Scarlet, Brilliant Carmine BS, Permanent Red (F2R, F4R, FRL, FRLL, F4RH), Fast Scarlet VD, Vulcan Fast Rubine B, Brilliant Scarlet G, Hans
- dyes include C.I. SOLVENT YELLOW (6, 9, 17, 31, 35, 100, 102, 103, 105), C.I. SOLVENT ORANGE (2, 7, 13, 14, 66), C.I. SOLVENT RED (5, 16, 17, 18, 19, 22, 23, 143, 145, 146, 149, 150, 151, 157, 158), CI. SOLVENT VIOLET (31, 32, 33, 37), C.I. SOLVENT BLUE (22, 63, 78, 83 to 86, 191, 194, 195, 104), C.I. SOLVENT GREEN (24, 25) and C.I. SOLVENT BROWN (3, 9).
- commercially available dyes may be used.
- examples of the commercially available dyes include: AIZEN SOT DYES Yellow 1, 3, 4,
- Blue-670 manufactured by BASF
- an added amount of the colorant is not particularly restricted, and it may be appropriately selected according to a desired degree of coloration. Nonetheless, it is preferably 1 part by mass to 50 parts by mass with respect to 100 parts by mass the polyester resin pressure- plastic material.
- the above -de scribed colorant may be used alone
- a binder resin for the toner of the present invention it is preferable to use a resin having high solubility to a solvent and having a transmittance defined as described above of constantly 90% or greater.
- the resin it is preferable to use a polyester resin, and it is preferable to use a crystalline polyester resin.
- a toner 5 having superior low-temperature fixing property may be prepared.
- a content of the polyester resin (first polyester resin) as the above -de scribed resin for a masterbatch relative to a content of the polyester resin (second polyester resin) is, as the binder resin is, as a mass ratio (first polyester resin /second polyester resin), preferably in a range of 5/95 to 70/30.
- a monomer of the polyester resin for the binder resin is not particularly restricted. Nonetheless, an alcohol component and a carboxylic acid component described below may be used.
- Examples of a dihydric alcohol component include ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, diethylene glycol, triethylene glycol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, 2-ethyM,3-hexanediol, hydrogenated bisphenol A, and a diol obtained by polymerization of bisphenol A with a cyclic ether such as ethylene oxide and propylene oxide.
- a dihydric alcohol component include ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, diethylene glycol, triethylene glycol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, 2-eth
- Examples of a carboxylic acid component of the polyester resin include ' ⁇ benzenedicarboxylic acids such as phthalic acid, isophthalic acid and terephthalic acid, and anhydrides thereof; alkyl dicarboxylic acids such as succinic acid, adipic acid, sebacic acid and azelaic acid, and anhydrides thereof; unsaturated dibasic acids such as maleic acid, citraconic acid, itaconic acid, alkenyl succinic acid, fumaric acid and mesaconic acid; unsaturated dibasic anhydrides such as maleic
- Examples of a polycarboxylic acid component having 3 or more valences include ⁇ trimellitic acid, pyromellitic acid, 1,2,4- benzenetricarboxylic acid, 1,2, 5-benzene tricarboxylic acid, 2,5,7- naphthalene tricarboxylic acid, 1,2,4-naphthalenetricarboxylic acid, 1,2,4-butanetricarboxylic acid, 1,2,5-hexanetricarboxylic acid, 1,3- dicarboxyl-2-methyl-2-methylenecarboxypropane,
- a polyester prepolymer having an isocyanate group is preferably used in producing the toner of the present embodiment.
- the polyester prepolymer having an isocyanate group may be produced by, for example, reacting a terminal carboxyl group or hydroxyl group of the polyester obtained by polycondensation reaction of a polyhydric alcohol and a polycarboxylic acid with a polyvalent isocyanate compound.
- a content of a component constituting the polyvalent isocyanate compound in the polyester prepolymer having an isocyanate group is usually 0.5% by mass to 40% by mass, preferably 1% by mass to
- a number of an isocyanate group included in one molecule of the polyester prepolymer having an isocyanate group is usually 1 or greater, preferably 1.5 to 3 on average, and more preferably 1.8 to 2.5 on average.
- the number of the isocyanate group included per one molecule is less than 1, a molecular weight of the urea-modified polyester decreases, which may result in degraded hot-offset resistance.
- diamines diamines, polyamines having three or more hydroxyl groups, amino alcohols, aminomercaptans, amino acids and these compounds with an amino group blocked may be used.
- diamines examples include- aromatic diamines (e.g.
- phenylene diamine diethyltoluene diamine, 4,4'- diaminodiphenylmethane
- alicyclic diamines e.g. 4,4'-diamino-3,3'- dimethyldicyclohexylmethane, diaminecyclohexane, isophorone
- aliphatic diamines e.g. ethylenediamine, tetramethylene diamine, hexamethylene diamine.
- polyamines having three or more hydroxyl groups examples include diethylene triamine and triethylene tetramine.
- amino alcohols examples include ethanolamine and hy droxyethylaniline .
- aminomercaptans examples include aminoethyl
- amino acids examples include aminopropionic acid and aminocaproic acid.
- Examples of these compounds with an amino group blocked include a ketimine compound and an oxazoline compound obtained from the above -de scribed amines and ketones (e.g. acetone, methyl ethyl ketone, methyl isobutyl ketone).
- ketones e.g. acetone, methyl ethyl ketone, methyl isobutyl ketone.
- the diamines and a mixture of the diamines and a small amount of the polyamines having three or more hydroxyl groups are preferable.
- molecular weight of the urea-modified polyester decreases, which may result in degraded hot-offset resistance.
- a molecular weight of the urea-modified polyester to be obtained may be adjusted using a reaction terminator according to necessity.
- reaction terminator examples include a monoamine (e.g. diethylamine, dibutylamine, butylamine, laurylamine) and compounds with these blocked (e.g. ketimine compounds).
- a monoamine e.g. diethylamine, dibutylamine, butylamine, laurylamine
- compounds with these blocked e.g. ketimine compounds
- a reaction time is selected according to a reactivity of the isocyanate group structure included in the polyester prepolymer with the amines. Nonetheless, it is usually 10 minutes to 40 hours, and preferably 2 hours to 24 hours.
- a reaction temperature is usually 0°C to 150°C, and preferably 40°C to 98°C.
- catalysts described below may be used according to necessity.
- specific examples of the catalyst include dibutyltin laurate and dioctyltin laurate.
- a mass ratio of the non-modified polyester and the urea- modified polyester is usually 20/80 to 95/5, preferably 70/30 to 95/5, more preferably 75/25 to 95/5, and further preferably 80/20 to 93/7.
- the toner of the present embodiment may include other materials such as releasing agent, charge controlling agent and external additive according to necessity.
- the releasing agent is not particularly restricted, but waxes may be favorably used, for example.
- the waxes used have a melting point of preferably 50°C to 150°C.
- the melting point of the wax used as the releasing agent is less than 50°C, the toner may have degraded heat- resistant storage stability.
- the melting point of the wax used as the releasing agent exceeds 150°C, the releasing agent does not have a sufficient releasing property, which may result in degraded toner fixability.
- a content of the releasing agent is preferably 2% by mass to 15% by mass with respect to the toner.
- the content of the releasing agent with respect to the toner is less than 2% by mass, there are cases where the obtained toner has insufficient offset preventing effect.
- the content of the releasing agent with respect to the toner exceeds 15% by mass, there are cases where the obtained toner may have degraded transfer property and durability.
- the waxes are not particularly restricted. Examples thereof include ⁇ lowmolecular-weight polyolefin waxes such as low -molecular- weight polyethylene and lowmolecular-weight polypropylene * " synthetic hydrocarbon waxes such as Fischer-Tropsch wax; natural waxes such as bees wax, carnauba wax, candelilla wax, rice wax and montan wax! petroleum waxes such as paraffin wax and microcrystalline wax; higher fatty acids such as stearic acid, palmitic acid and myristic acid, and metal salts of higher fatty acids, higher fatty acids amides, synthetic ester waxes and various modified waxes thereof. These waxes may be used alone or in combination of two or more types.
- the obtained toner has favorable offset prevention property, transfer property and durability.
- the charge controlling agent is not particularly restricted.
- Examples thereof include nigrosine dyes, triphenylmethane dyes, chromium-containing metal complex dyes, molybdic acid chelate pigments, rhodamine dyes, alkoxy amines, quaternary ammonium salts (including fluorine-modified quaternary ammonium salts), alkyl amides, elemental phosphorus or phosphorus compounds, elemental tungsten or tungsten compounds, fluorine surfactants, metal salts of salicylic acid and metal salts of salicylic acid derivatives.
- quaternary ammonium salt Copy blue PR of triphenylmethane derivative, Copy charge NEG VP2036, Copy charge NX VP434 of quaternary ammonium salts (all manufactured by Hoechst); LRA-901, LR-147 as a boron complex (all manufactured by Carlit Japan Co., Ltd.); copper phthalocyanine, perylene, quinacridone, azo pigments, and other polymeric compounds having functional groups such as sulfonic acid group, carboxyl group and quaternary ammonium salt.
- a content of the charge controlling agent may be appropriately selected according to desired charge properties of the toner to be produced. Nonetheless, it is preferably 0.1% by mass to 10% by mass, and more preferably 0.2% by mass to 5% by mass with respect to the toner.
- the content of the charge controlling agent exceeds 10% by mass, the obtained toner has increased charging property, which may result in degraded effect of the charge controlling agent. Specifically, an electrostatically attractive force with a developing roller increases, which may result in decreased fluidity of a developer or decreased image density.
- the content of the charge controlling agent is less than 0.1% by mass, there are cases where the obtained toner has insufficient charge startup properties or charge amount.
- the toner of the present embodiment may be obtained using the polymerization method, where a toner material is subjected to
- an external additive mainly inorganic particles
- an external additive may be added for the purpose of enhancing fluidity, storage stability, developing property and transfer property of the toner to be obtained.
- a powder mixer is usually used in adding and mixing the external additive, and the mixer is preferably equipped with a jacket for controlling an internal temperature thereof.
- the additive may be added in the middle or gradually in order to vary a load history applied to the additive.
- the load history may be varied by varying a rotational speed, a rolling speed, time and temperature of the mixer.
- a strong load may be applied at the beginning, followed by a relatively weak load; or it may be vice versa.
- Examples of the mixer in adding a load include a V-type mixer, a rocking mixer, a LOEDIGE mixer, a nauta mixer and a HENSCHEL mixer.
- a toner After mixing, by passing a sieve of 250mesh or greater to remove coarse particles and aggregated particles, and thereby, a toner may be obtained.
- inorganic particles as the external additive in view of fluidity, charging property or developing property.
- the inorganic particles have a primary particle diameter of preferably 5 x 10 ⁇ 3 ⁇ to 2 ⁇ , and more preferably 5 x 10 ⁇ 3 ⁇ to 0.5 ⁇ .
- a BET specific surface area thereof is preferably 20 m 2 /g to 500 m 2 /g.
- An amount of the external additive added with respect to the toner is preferably 0.01% by mass to 5% by mass.
- the external additive include silica, alumina, titanium oxide, barium titanate, magnesium titanate, calcium titanate, strontium titanate, zinc oxide, tin oxide, silica sand, clay, mica,
- wollastonite diatomaceous earth, chromium oxide, cerium oxide, colcothar, antimony trioxide, magnesium oxide, zirconium oxide, barium sulfate, barium carbonate, calcium carbonate, silicon carbide and silicon nitride.
- the surface treatment is provided using a silane coupling agent, a silylating agent, a silane coupling agent having a fluorinated alkyl group, an organic titanate coupling agent, an aluminum-based coupling agent, silicone oil, modified silicone oil and so on, for example.
- a silane coupling agent a silylating agent, a silane coupling agent having a fluorinated alkyl group, an organic titanate coupling agent, an aluminum-based coupling agent, silicone oil, modified silicone oil and so on, for example.
- An organically modified layered inorganic mineral is an organically modified layered inorganic mineral in which at least a part of ions present between layers of a layered inorganic mineral is substituted by an organic ion.
- the layered inorganic mineral usually denotes a laminated inorganic mineral formed of overlapping layers having a thickness of several nm.
- modified denotes introduction of the organic ion to the ions present between layers of the layered inorganic mineral, and it is intercalation in a broad sense.
- the organically modified layered inorganic mineral efficiently enhances a structural viscosity of the binder resin in a vicinity of a surface layer of the toner when it is arranged in the vicinity of the surface layer of the toner, and it can improve stress resistance of the toner.
- a state of the organically modified layered inorganic mineral present in the toner may be confirmed by cutting a sample in which the toner particles are embedded in an epoxy resin and so on with a micro microtome or an ultramicrotome and by observing a toner cross- section with a scanning electron microscope (SEM) and so on.
- SEM scanning electron microscope
- a sample in which the toner particles are embedded in an epoxy resin and so on may be cut by an FIB-STEM (HD-2000, manufactured by Hitachi, Ltd.) and so on for observing a toner cross-section.
- FIB-STEM FIB-STEM
- the vicinity of the toner surface in the present invention denotes a region of 0 nm to 300 nm from an outermost surface of the toner to the inside of the toner at an observation image of the toner cross-section obtained by cutting a sample in which the toner particles are embedded in an epoxy resin and so on with a micro microtome, an ultramicrotome or an FIB-STEM.
- the layered inorganic compound is not particularly restricted. Nonetheless, examples thereof include- clay minerals of smectite group such as montmorillonite, saponite and hectorite; clay minerals of kaolin group such as kaolinite, " and bentonite, attapulgite, magadiite and kanemite. These may be used alone or in combination of two or more types.
- the organic ion is not particularly restricted. Nonetheless, examples thereof include- a quaternary ammonium ion, a phosphonium ion and an imidazolium ion; and a sulfate ion, a sulfonate ion, a carboxylic acid ion and a phosphate ion having a skeleton such as branched, non-branched or cyclic alkyl skeleton having 1 to 44 carbon atoms, branched, non-branched or cyclic alkenyl skeleton having 1 to 22 carbon atoms, branched, non-branched or cyclic alkoxy skeleton having 8 to 32 carbon atoms, branched, non-branched or cyclic hydroxyalkyl skeleton having 2 to 22 carbon atoms, ethylene oxide and propylene oxide. These may be used alone or in combination of two or more.
- Examples of the quaternary alkylammonium ion include a trimethylstearylammonium ion, a dimethylstearylbenzylammonium ion, a dimethylactadecylammonium ion and an oleyl bis(2- hydroxyethyOmethylammonium ion.
- the organically modified layered inorganic compound may be an organically modified layered inorganic compound obtained by
- inorganic anions by substitution of at least a part of divalent metal ions present between layers with trivalent metal ions and then by substituting at least a part of the inorganic anions with organic anions.
- Examples of commercially available products of the organically modified layered inorganic compound include " quaternium 18 bentonite such as BENTONE 3, BENTONE 38, BENTONE 38V (all manufactured by Rheox Corporation), TIXOGEL VP (manufactured by United
- bentonite such as Bentone 27 (manufactured by Rheox Corporation), TIXOGEL LG (manufactured by United Catalyst), CLAYTON AF, CLAYTON APA (all manufactured by Southern Clay Products, Inc.); quaternium 18 benzalkonium bentonite such as CLAYTON HT,
- organically modified montmorillonite such as CLAYTON HY
- the organically modified layered inorganic compound may be used as a masterbatch by forming a composite with a resin and so on.
- a weight-average particle diameter of the toner of the present embodiment is not particularly restricted. Nonetheless, it is preferably within a range of 3.5 ⁇ to 10 ⁇ in view of obtaining an image having favorable granularity, sharpness and fine-line reproducibility. There is usually a tendency that the smaller particle diameter produces an image having more superior sharpness and fine-line reproducibility.
- the toner of the present embodiment preferably has a weight- average particle diameter of 7.5 ⁇ or less for color image formation.
- the weight -average particle diameter of the toner of less than 3.5 ⁇ may result in degraded fluidity or transfer property of the toner.
- the weight-average particle diameter of the toner may be measured by a method described below, for example.
- a particle size distribution of the toner may be measured, for example, by a Coulter counter method using COULTER COUNTER TA- II or COULTER MULTISIZER III (all of these products being
- the weight- average particle diameter is measured according to the following method using COULTER MULTISIZER III.
- a surfactant preferably polyoxyethylene alkyl ether
- a dispersant 100 mL to 150 mL of an aqueous electrolyte solution.
- an about 1-% by mass 0.1 mL to 5 mL of a surfactant, preferably polyoxyethylene alkyl ether, is added as a dispersant to 100 mL to 150 mL of an aqueous electrolyte solution.
- a surfactant preferably polyoxyethylene alkyl ether
- NaCl aqueous solution is prepared using first-grade sodium chloride as the electrolyte, and ISOTON-II (manufactured by Coulter, Inc.) may be used. Then, 2 mg to 20 mg of a measurement sample is added to the electrolyte. The electrolyte with the measurement sample suspended therein is subjected to dispersion treatment in an ultrasonic disperser for about 1 minute to 3 minutes.
- dispersion treatment in an ultrasonic disperser for about 1 minute to 3 minutes.
- the following 13 channels are usually used: 2.00 ⁇ to less than 2.52 ⁇ ,' 2.52 ⁇ to less than 3.17 ⁇ ; 3.17 ⁇ to less than 4.00 ⁇ ; 4.00 ⁇ to less than 5.04 ⁇ > ' 5.04 ⁇ to less than 6.35 ⁇ ; 6.35 ⁇ to less than 8.00 ⁇ ; 8.00 ⁇ to less than 10.08 ⁇ ; 10.08 ⁇ to less than 12.70 ⁇ ; 12.70 ⁇ to less than 16.00 ⁇ ; 16.00 ⁇ to less than 20.20 ⁇ ; 20.20 ⁇ to less than 25.40 ⁇ ; 25.40 ⁇ to less than 32.00 ⁇ ; and 32.00 ⁇ to less than 40.30 ⁇ . That is, particles having particle diameters of 2.00 ⁇ to less than 40.30 ⁇ are measured.
- the toner of the present embodiment can be used as a one- component developer or a two-component developer.
- the one-component developer is composed of the toner of the present embodiment
- the two-component developer is composed of the toner of the present embodiment and a carrier.
- the toner of the present embodiment may be used as a non-magnetic one-component toner or a magnetic one-component toner (magnetic toner).
- magnetic toner When it is used as the magnetic toner, a heretofore known magnetic material is included in the toner for use.
- magnese such as magnetite, hematite and ferrite> ' metals such as iron, cobalt and nickeL " alloys of these metals with metals such as aluminum, cobalt, copper, lead, magnesium, tin, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten and vanadium. These may be used alone or in combination of two or more.
- the magnetic material to be used preferably has an average particle diameter of around 0.1 ⁇ to 2 ⁇ .
- a content of the magnetic material is usually 20 parts by mass to 200 parts by mass with respect to 100 parts by mass of the binder resin, and it is preferably 40 parts by mass to 150 parts by mass with respect to 100 parts by mass of the binder resin.
- a carrier used for the two-component developer is not
- a carrier composed of magnetic particles such as iron and ferrite, a resin-coated carrier in which the magnetic particles are coated with a resin, and a binder-type carrier in which magnetic material fine powder is dispersed in a binder resin may be used.
- Examples of a raw material of the magnetic material include ⁇ iron oxide such as magnetite, hematite and ferrite; metals such as iron, cobalt and nickel, ' and alloys of these metals with metals such as aluminum, cobalt, copper, lead, magnesium, tin, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten and vanadium! and mixtures thereof.
- a resin-coated carrier including a silicone resin, a copolymer resin (graft resin) of organopolysiloxane and vinyl monomers or a polyester resin uses as the coating resin in view of spent toner.
- a carrier coated with a resin obtained by reacting the copolymer resin of organopolysiloxane and vinyl monomers with an isocyanate is more preferable in view of durability, environmental stability and spent resistance.
- the vinyl monomer a monomer having a
- an amino resin such as polyvinyl and polyvinylidene resins, acrylic resin, polymethyl methacrylate resin, polyacrylonitrile resin, polyvinyl acetate resin, polyvinyl alcohol resin, polyvinyl butyral resin, polystyrene resin and styrene -acrylic copolymer resin, ' halogenated olefin resins such as polyvinyl chloride; polyester resins such as polyethylene terephthalate resin and polybutylene terephthalate resin; polycarbonate resins, polyethylene resins, polyvinyl fluoride resins, polyvinylidene fluoride resins, polytrifluoroethylene resin, polyhexafluor
- electrically conductive powder and so on may be included in the coating resin as a filler according to necessity.
- metal powder, carbon black, titanium oxide, tin oxide, zinc oxide, aluminum oxide, silica and so on may be used.
- the electrically conductive powder preferably has an average particle diameter of 1 ⁇ or less. When electrically conductive powder having an average particle diameter exceeding 1 ⁇ is used, there are cases where it becomes difficult to control electrical resistance.
- a volume -average particle diameter of the magnetic carrier is preferably 20 ⁇ to 100 ⁇ , and more preferably 20 ⁇ to 60 ⁇ in view of ensuring high image quality and preventing carrier fogging.
- the above described colorant and other toner materials are dispersed in an organic solvent, and thereby a toner material solution is prepared.
- organic solvent those preferably used has high volatility, with a boiling point of less than 100°C in view of easily removing the solvent after formation of the toner base particles.
- organic solvents such as toluene, xylene, benzene, carbon tetrachloride, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, trichlorethylene, chloroform, monochlorobenzene, dichloroethylidene, methyl acetate and ethyl acetate; and moreover water-miscible or water-soluble organic solvents including lower ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone, cyclic ethers such as tetrahydrofuran, lower alcohol solvents such as methanol and ethanol, and nitrogen-containing organic solvents such as dimethylformamide.
- solvents may be used alone or in combination of two or more types.
- the ester organic solvents such as methyl acetate and ethyl acetate
- the aromatic solvents such as toluene and xylene
- the halogenated hydrocarbon such as methylene chloride, 1,2-dichloroethane, chloroform and carbon tetrachloride are preferably used.
- An amount of the organic solvent used is usually 0 parts by mass to 300 parts by mass, preferably 0 parts by mass to 100 parts by mass, and more preferably 25 parts by mass to 70 parts by mass with respect to 100 parts by mass of the above-described polyester prepolymer.
- the aqueous medium may be water alone or water mixed with an organic solvent such as alcohols (e.g. methanol, isopropyl alcohol and ethylene glycol), dimethylformamide, tetrahydrofuran, CELLOSOLVEs
- alcohols e.g. methanol, isopropyl alcohol and ethylene glycol
- dimethylformamide e.g. dimethylformamide
- tetrahydrofuran CELLOSOLVEs
- ketones e.g. acetone and methyl ethyl ketone
- An amount of the aqueous medium used with respect to 100 parts by mass of the toner material solution is usually 50 parts by mass to 2,000 parts by mass, and preferably 100 parts by mass to 1,000 parts by mass.
- the amount of the aqueous medium used is less than 50 parts by mass, there are cases where the toner material solution has degraded dispersibility.
- the amount of the aqueous medium used exceeding 2,000 parts by mass is not economical.
- a dispersant such as surfactant and resin particles is preferably added. Addition of the dispersant such as surfactant and resin particles can improve dispersibility of the materials such as colorant, (non-modified) polyester, polyester prepolymer having an isocyanate group and releasing agent.
- the surfactant examples include- ' an anionic surfactant such as alkyl benzene sulfonate, crolefin sulfonate and phosphoric acid ester! a cationic surfactant of an amine salt type such as alkylamine salt, amino alcohol fatty acid derivative, polyamine fatty acid derivative and imidazoline, and a cationic surfactant of a quaternary ammonium salt type such as alkyltrimethyl ammonium salt, dialkyldimethyl ammonium salt, alkyldimethylbenzyl ammonium salt, pyridinium salt, alkyl iso- quinolinium salt and benzethonium chloride!
- anionic surfactant such as alkyl benzene sulfonate, crolefin sulfonate and phosphoric acid ester
- a cationic surfactant of an amine salt type such as alkylamine salt, amino alcohol fatty acid derivative, polyamine fatty acid
- a nonionic surfactant such as fatty acid amide derivative and polyhydric alcohol derivative! an amphoteric surfactant such as alanine, dodecyldi(aminoethyl)glycine, di(octyl aminoethyl) glycine and N-alkyl-N,N-dimethyl ammonium betaine.
- an amphoteric surfactant such as alanine, dodecyldi(aminoethyl)glycine, di(octyl aminoethyl) glycine and N-alkyl-N,N-dimethyl ammonium betaine.
- a surfactant having a fluoroalkyl group may be favorably used since it exhibits superior dispersibility with a very small amount.
- a favorably used anionic surfactant having a fluoroalkyl group examples include a fluoroalkylcarboxylic acid having 2 to 10 carbon atoms and a metal salt thereof, disodium
- perfluorooctanesulfonylglutamate sodium 3-[omega-fluoroalkyl (C6 to Cll) oxy]-l-alkyl (C3 to C4) sulfonate, sodium 3-[omega-fluoroalkanoyl (C6 to C8)-N-ethylamino]'l'propanesulfonate, fluoroalkyl (Cll to C20) carboxylic acid and metal salts thereof, perfluoroalkyl carboxylic acid (C7 to C13) and metal salts thereof, perfluoroalkyl (C4 to C12) sulfonic acid and metal salts thereof, perfluorooctanesulfonic acid
- Examples of a cationic surfactant having a fluoroalkyl group include aliphatic primary, secondary and tertiary amine acids having a fluoroalkyl group, aliphatic quaternary ammonium salts such as perfluoroalkyl (C6 to CIO) sulfonamidepropyltrimethylammonium salts, benzalkonium salts, benzethonium chloride, pyridinium salts, and imidazolinium salts.
- Examples of commercially available products thereof include SURFLON S-121 (manufactured by Asahi Glass Co., Ltd.); FLUORAD FC-135 (manufactured by Sumitomo 3M Co., Ltd.); UNIDYNE DS-202 (manufactured by Daikin Industries, Ltd.),
- MEGAFACE F-150, F-824 manufactured by DIC Corporation
- EFTOP EF-132 manufactured by Tochem Products Inc.
- FTERGENT F-300 manufactured by Neos Company Ltd.
- the resin particles are not particularly restricted as long as the resin can form an aqueous dispersion, and the resin may be a
- thermoplastic resin and a thermosetting resin.
- resins include a vinyl resin, a polyurethane resin, an epoxy resin, a polyester resin, a polyamide resin, a polyimide resin, a silicon-based resin, a phenolic resin, a melamine resin, an urea resin, an aniline resin, an ionomer resin and a polycarbonate resin. These resins may be used alone or in combination of two or more types.
- the vinyl resin include resins as a polymer obtained by homopolymerization or copolymerization of vinyl monomers such as styrene-(meth)acrylate copolymer, styrene- butadiene copolymer, (meth)acrylic acid-acrylate polymer, styrene- acrylonitrile copolymer, styrene-maleic anhydride copolymer and styrene-(meth)acrylic acid copolymer.
- vinyl monomers such as styrene-(meth)acrylate copolymer, styrene- butadiene copolymer, (meth)acrylic acid-acrylate polymer, styrene- acrylonitrile copolymer, styrene-maleic anhydride copolymer and styrene-(meth)acrylic acid copolymer.
- An average particle diameter of the resin particles is usually 5 nm to 300 nm, and preferably 20 nm to 200 nm.
- An inorganic compound dispersant such as tricalcium phosphate, calcium carbonate, titanium oxide, colloidal silica and hydroxy apatite may be additionally used.
- a polymeric protective colloid is used for stabilizing dispersed droplets as a dispersant which may be used further in combination.
- examples of the polymeric protective colloid to be used include- homopolymers or copolymers of acids such as acrylic acid, methacrylic acid, a-cyanoacrylic acid, a-cyanomethacrylic acid, itaconic acid, cro tonic acid, fumaric acid, maleic acid and maleic anhydride, (meth)acrylic monomer including a hydroxyl group such as ⁇ - hydroxyethyl acrylate, 6- hydroxy ethyl methacrylate, ⁇ -hydroxypropyl acrylate, ⁇ -hydroxypropyl methacrylate, ⁇ -hydroxypropyl acrylate, ⁇ -hydroxypropyl methacrylate, 3-chloro-2-hydroxypropyl acrylate, 3- chloro-2"hydroxypropyl methacrylate, diethylene glycol monoacrylate, diethylene glycol monomethacrylate, glycerin monoacrylate, glycerin monomethacrylate, n-methylol acrylamide and n-methyl
- methacrylamide vinyl alcohols and ethers of vinyl alcohols such as vinyl methyl ether, vinyl ethyl ether and vinyl propyl ether, esters of vinyl alcohols and compounds having a carboxyl group such as vinyl acetate, vinyl propionate and vinyl butyrate, acrylamide, methacrylamide, diacetone acrylamide and methylol compounds thereof, acid chlorides such as acrylic acid chloride and methacrylic acid chloride, and nitrogen- containing compounds such as vinyl pyridine, vinyl pyrrolidone, vinyl imidazole and ethylene imine, and these compounds including a heterocyclic ring; polyoxyethylenes such as polyoxyethylene,
- polyoxypropylene polyoxyethylene alkyl amine, polyoxypropylene alkyl amine, polyoxyethylene alkyl amides, polyoxypropylene alkyl amides, polyoxyethylene nonyl phenyl ether, polyoxyethylene laurylphenyl ether, polyoxyethylene stearylphynyl ester and polyoxyethylene nonylphenyl ester; celluloses such as methylcellulose, hydroxymethylcellulose and hydroxypropylcellulose.
- a dispersion method for dispersing the toner material in the organic solvent is not particularly restricted. Nonetheless, a lowspeed shearing method, a high-speed shearing method, a frictional method, a high-pressure jet method or an ultrasonic method may be employed. Among these, the high-speed shearing method is preferable since it allows controlling a particle diameter of the dispersing material to 2 ⁇ to 20 ⁇ .
- a rotational speed is usually 1,000 rpm to 30,000 rpm, and preferably 5,000 rpm to 20,000 rpm.
- a dispersion time is not particularly restricted, but for a batch operation, it is preferably 0.1 minutes to 5 minutes.
- a dispersion temperature is usually 0°C to 150°C (under an increased pressure), and preferably 40°C to 98°C.
- the above-described amines are added to react with the polyester prepolymer having an isocyanate group.
- spindle-shaped toner base particles are usually prepared.
- the calcium phosphate salt may be removed from the toner base particles by dissolving the calcium phosphate salt by acid such as hydrochloric acid followed by rinsing.
- the calcium phosphate salt may also be removed by an operation of decomposition using an enzyme.
- a charge controlling agent is added to the toner base particles obtained by desolvation. Thereafter, inorganic particles such as silica particles and titanium oxide fine particles are adhered on the base particles as an external additive, and thereby, the toner is obtained.
- the toner having a small particle diameter and a sharp particle size distribution may be produced. Also, by sufficiently stirring in removing the organic solvent, the produced toner has a shape between a sphere and a rugby ball, and a surface morphology may be controlled from a smooth surface to a wrinkled surface.
- Elution of the toner materials to the aqueous medium may be examined by placing the aqueous medium after granulation in a quartz cell having a layer thickness of 1 cm and by measuring the
- elusion may be determined for a transmittance at a wavelength of 550 nm of 80% or less.
- the developer of the present invention is developed by an image forming method including an electrostatic latent image forming step, a developing step, a transfer step and a fixing step. It is preferable that the image forming method further includes a cleaning step of a web system, and it may include a neutralizing step, a recycling step, a controlling step and so on, for example, according to necessity.
- An image forming apparatus of the present invention includes: an image bearing member (also referred to as an electrostatic latent image bearing member), a charging unit, an exposure unit, a developing unit and a transfer unit. It is preferable that the image forming apparatus further includes a cleaning unit, and it may include a neutralizing unit, a recycling unit, a controlling unit and so on, for example, according to necessity.
- the developing unit is provided with the toner, and it develops an electrostatic latent image on the image bearing member using the toner.
- the electrostatic latent image forming step is a step for forming an electrostatic latent image on the electrostatic latent image bearing member such as photoconductive insulator and photoconductor.
- a material, a shape, a structure, a size and so on of the electrostatic latent image bearing member are not particularly restricted, and it may be appropriately selected from heretofore known ones.
- the shape of the electrostatic latent image bearing member is preferably a drum shape.
- examples of the photoconductor include an inorganic
- photoconductor such as amorphous silicon and selenium and an organic photoconductor such as polysilane and phthalopolymethine.
- organic photoconductor such as polysilane and phthalopolymethine.
- an electrostatic latent image forming unit includes, for example, a charger as a charging unit which uniformly charges the surface of the electrostatic latent image bearing member by applying a voltage and an exposure device as an exposure unit which carries out image-wise exposure on the surface of the electrostatic latent image bearing member.
- the charger is not particularly restricted. Nonetheless, examples thereof include : heretofore known contact chargers equipped with an electrically conductive or semiconductive roller, brush, film, rubber blade and so on; and a non-contact chargers which use corona discharge such as corotron and scorotron.
- the exposure device is not particularly restricted as long as it can expose imagewise an image to be formed on the surface of the electrostatic latent image bearing member charged by the charger.
- examples thereof include various exposure devices such as duplication optical system, rod lens array system, laser optical system and liquid-crystal shutter optical system.
- a back light system which exposes imagewise from a back side of the electrostatic latent image bearing member may be adopted.
- the developing step is a step for developing the electrostatic latent image formed on the electrostatic latent image forming step using a developer to form a visible image.
- the developing unit is not particularly restricted as long as the development is carried out using the toner or the developer of the present invention. Nonetheless, for example, those including a developing device which contains the toner or the developer of the present invention and can impart the toner to the electrostatic latent image in a contact or non-contact manner may be used. Also, a developing device which is integrally provided with a developer container is preferable.
- the developing device may employ a dry developing system or a wet developing system.
- the developing device may be a developing device for a single color, or a developing device for multicolor. Examples thereof include a developing device containing a stirrer for rubbing and stirring to charge the developer of the present invention and a rotatable magnet roller.
- the toner and the carrier are mixed and stirred in the developing device, for example.
- the toner is charged by a friction thereby and maintained on a surface of the rotating magnet roller as a chain of magnetic particles, and a magnetic brush is formed.
- the magnet roller is arranged near the electrostatic latent image bearing member, and thus a part of the toner which constitutes the magnetic brush formed on the surface of the magnet roller moves to the surface of the electrostatic latent image bearing member due to an electrically attractive force.
- the electrostatic latent image is developed by the toner, and a visible image is formed on the surface of the electrostatic latent image bearing member.
- the developer contained in the developing device may be a one -component developer or a two-component developer.
- the transfer step is a step, for example, for charging the electrostatic latent image bearing member on which the toner image has been formed using a transfer charger to transfer the toner image on a recording medium.
- the transfer step preferably includes ⁇ a primary transfer step which transfers the toner image on an intermediate transfer member; and a secondary transfer step which transfers the toner image transferred on the intermediate transfer member on the recording medium.
- the transfer step more preferably includes- * a primary transfer step which uses toners of two or more colors, preferably full-color toners, and transfers the toner images of the respective colors on the intermediate transfer member to form a composite toner image' and a secondary transfer step which transfers the composite toner image formed on the intermediate transfer member on the recording medium.
- the transfer unit preferably includes " a primary transfer unit which transfers the toner images on the intermediate transfer member to form the composite toner image * and a secondary transfer unit which transfers the composite toner image formed on the intermediate transfer member on the recording medium.
- the intermediate transfer member is not particularly restricted, but examples thereof include an endless transfer belt.
- the transfer unit preferably includes a transfer device which peels off and charges the toner image formed on the electrostatic latent image bearing member to the side of the recording medium.
- the transfer unit may include one transfer device, or two or more transfer devices.
- Examples of the transfer device include a corona transfer device by corona discharge, a transfer belt, a transfer roller, a pressure transfer roller and an adhesive transfer device.
- the recording medium is not particularly restricted, and it may be appropriately selected from heretofore known recording medium such as recording paper.
- the fixing step is a step for fixing the toner image which has been transferred on the recording medium.
- fixing may be carried out each time the toner of a respective color is transferred on the recording medium, or fixing may be carried out once after the toners of all the colors are transferred and laminated on the recording medium.
- the fixing unit is not particularly restricted, and heretofore known heating and pressurizing unit may be used. Examples of the heating and pressurizing unit include a combination of a heat roller and a pressure roller and a combination of a heat roller, a pressure roller and an endless belt. At this time, a heating temperature is usually 80°C to 200°C.
- the neutralizing step is a step for neutralizing the electrostatic latent image bearing member by applying a neutralizing bias.
- the neutralizing unit is not particularly restricted as long as it can apply the neutralizing bias on the electrostatic latent image bearing member, a neutralizing lamp and so on may be used, for example.
- the cleaning step is a step for removing the toner remaining on the electrostatic latent image bearing member.
- a web cleaner may be used as the cleaning unit.
- the recycling step is a step for recycling the toner removed by the cleaning step to the developing unit.
- the recycling unit is not particularly restricted, and heretofore known conveying units and so on may be used.
- the controlling step is a step for controlling the above steps.
- the controlling unit is not particularly restricted as long as it controls operations of the each unit, and, for example, a sequencer or a computer may be used.
- the image forming method of the present embodiment provides superior low-temperature fixing property and heat-resistant storage stability even in a high-speed image formation and causes no offset phenomenon since it uses the above-described toner of the present embodiment. Also, since it uses the toner for image formation fixed only at a desired location of the recording medium, a high-quality image having superior gloss and almost no occurrences of ghost may be stably output even in an image formation by an image forming apparatus of a fast output electrophotographic system.
- an image forming unit may be incorporated and fixed in a copying machine, a facsimile or a printer, or it may be incorporated in these apparatuses in a form of a process cartridge.
- the process cartridge is a device (component) including a built-in image bearing member (photoconductor) and including the charging unit, the exposure unit, the developing unit, the transfer unit or the cleaning unit, or any combination thereof. It may further include other units such as neutralizing unit according to necessity.
- FIG. 1 is a schematic diagram illustrating a structure of an image forming apparatus equipped with a process cartridge.
- a denotes the entire process cartridge
- ' "b” denotes a photoconductor
- c denotes a charging unit
- d denotes a developing unit
- e denotes a cleaning unit.
- the photoconductor "b" and the developing unit “d” are integrally bound and configured as the process cartridge, and this process cartridge is detachably mounted on an image forming apparatus main body such as copying machine and printer.
- the process cartridge of the present embodiment Since the above-described toner of the present embodiment is supplied to the process cartridge of the present embodiment, it is possible to output a high-quality image fixed stably only at a desired location of the recording medium without occurrences of an offset phenomenon by a non-fixed image in the fixing unit. Also, the process cartridge provides easy storage and transport and superior handling property.
- a color image forming apparatus of a tandem developing system may be used, where at least four (4) developing units of different developing colors are arranged in series.
- An image forming apparatus of the present embodiment may be of a direct transfer method, where an image on each photoconductor is sequentially transferred by a transfer apparatus to a sheet conveyed by a sheet conveying belt, or it may be of an indirect transfer method, where an image on each photoconductor is sequentially transferred once on the intermediate transfer member by a primary transfer apparatus, and then the image on the intermediate transfer member is collectively transferred on a sheet by a secondary transfer apparatus.
- FIG. 2 illustrates one embodiment of the present invention, and it is an electrophotographic apparatus of a tandem indirect transfer method.
- a reference numeral 100 denotes a copying apparatus main body
- 200 denotes a paper feed table on which the main body is mounted
- 300 denotes a scanner installed on the copying apparatus main body 100
- 400 denotes an automatic document feeder (ADF) installed further thereon.
- An intermediate transfer member 10 as an endless belt is disposed at a center of the copying apparatus main body 100.
- FIG. 2 it may be rotationally transported in clockwise direction in the figure by being stretched over three (3) support rollers 14, 15 and 16 in the illustrated example.
- an intermediate transfer member cleaning apparatus 17 which removes a residual toner remaining on the intermediate transfer member 10 after image transfer, is disposed to the left of the second support roller 15 among the three rollers.
- An exposure apparatus 21 is disposed on the tandem image forming apparatus 20, as illustrated in FIG. 2.
- a secondary transfer apparatus 22 is equipped on a side opposite to the tandem image forming apparatus 20 across the intermediate transfer member 10.
- the secondary transfer apparatus 22 includes a secondary transfer belt 24 as an endless belt stretched between two (2) rollers 23, and it is disposed by being pressed on the third support roller 16 via the intermediate transfer member 10 to transfer an image on the intermediate transfer member 10 to a sheet.
- a fixing apparatus 25 for fixing a transfer image on the sheet is disposed on a side of the secondary transfer apparatus 22.
- the fixing apparatus 25 is configured with a pressure roller 27 pressed against a fixing belt 26 as an endless belt.
- the above-described secondary transfer apparatus 22 also has a sheet conveying function to convey the sheet after image transfer to this fixing apparatus 25.
- a transfer roller or a non-contact charger may be arranged as the secondary transfer apparatus 22, and in such a case, it is difficult to provide the sheet conveying function as well.
- a sheet inverting apparatus 28 for inverting the sheet for recording images on both sides of the sheet is provided in parallel with the above-described tandem image forming apparatus 20 below this secondary transfer apparatus 22 and the fixing apparatus 25.
- the electrophotographic apparatus and the document is placed on the a document table 30 on the automatic document feeder 400.
- the automatic document feeder 400 is opened, the document is placed on a contact glass 32 of the scanner 300, and the automatic document feeder 400 is closed to press it.
- a start switch (not shown) is pressed.
- the scanner 300 is driven after the document is conveyed onto the contact glass 32 in case the document is placed on the automatic document feeder 400, or
- photoconductor 40 is rotated so as to form a single -color image of black, yellow, magenta or cyan on the photoconductor 40. Then, these single - color images are sequentially transferred along with conveyance of the intermediate transfer member 10, and a composite color image is formed on the intermediate transfer member 10. Further, one of paper-feed rollers 42 in the paper feed table 200 is selectively rotated to feed a sheet from one of paper cassettes 44 provided in multiple stages in a paper bank 43. The sheet is separated one-by-one by separation rollers
- the sheet after image transfer is conveyed by the secondary transfer apparatus 22 and sent to the fixing apparatus 25, and the transfer image is fixed with an application of heat and pressure in the fixing apparatus 25. Then, the sheet is switched by a switching claw 55, discharged in a discharge roller 56 and stacked on a discharge tray 57. Alternatively, it is switched by the switching claw 55 to the sheet inverting apparatus 28, inverted there and guided again to a transfer position. Then, an image is recorded on a back side as well, and the sheet is discharged by the discharge roller 56 on the discharge tray 57.
- the intermediate transfer member 10 after image transfer removes a residual toner remaining on the intermediate transfer member 10 after image transfer using the intermediate transfer member cleaning apparatus 17, and it prepares for the next image formation by the tandem image forming apparatus 20.
- the registration roller 49 is often used in a grounded state, but a bias may be applied thereto for removing paper dust of the sheet.
- each image forming unit 18 is equipped with a charging apparatus 60, a developing apparatus 61, a primary transfer apparatus 62, a hotoconductor cleaning apparatus 63 and a neutralization apparatus not shown around a drum-shaped photoconductor 40.
- a reactor equipped with a cooling tube, a stirrer and a nitrogen inlet tube was charged with: 326 parts by mass of dimethyl
- Resin for Masterbatch 2 was obtained by the same method as the synthesis of Resin for Masterbatch 1 except that the amount of propylene glycol and the amount of 1,3-propanediol used were changed to 130 parts by mass and 23 parts by mass, respectively.
- Resin for Masterbatch 3 was obtained by the same method as the synthesis of Resin for Masterbatch 1 except that the amount of propylene glycol and the amount of 1,3-propanediol used were changed to 115 parts by mass and 38 parts by mass, respectively.
- Resin for Masterbatch 4 was obtained by the same method as the synthesis of Resin for Masterbatch 1 except that the amount of propylene glycol and the amount of 1,3-propanediol used were changed to 100 parts by mass and 54 parts by mass, respectively.
- Resin for Masterbatch 5 was obtained by the same method as the synthesis of Resin for Masterbatch 1 except that the amount of propylene glycol and the amount of 1,3-propanediol used were changed to 95 parts by mass and 48 parts by mass, respectively.
- Resin for Masterbatch 6 was obtained by the same method as the synthesis of Resin for Masterbatch 1 except that the amount of propylene glycol, the amount of 1,3-propanediol and the amount of dimethyl terephthalate used were changed to 95 parts by mass, 48 parts by mass and 244 parts by mass, respectively, and that 82 parts by mass of dimethyl isophthalate was added.
- a reactor equipped with a cooling tube, a stirrer and a nitrogen inlet tube was charged with: 317 parts by mass of dimethyl
- a reactor equipped with a cooling tube, a stirrer and a nitrogen inlet tube was charged with: 308 parts by mass of dimethyl
- terephthalate 35 parts by mass of 1,3-propanediol; 144 parts by mass of neopentyl glycol; and 1.4 parts by mass of titanium
- terephthalate 154 parts by mass of propylene glycol, ' and 1.4 parts by mass of titanium dihydroxybis(triethanolaminate) as a polycondensation catalyst, and it was reacted at 180°C under a stream of nitrogen for 8 hours with generated methanol distilled.
- a reactor equipped with a cooling tube, a stirrer and a nitrogen inlet tube was charged with: 241 parts by mass of sebacic acid; 31 parts by mass of adipic acid; 164 parts by mass of 1,4-butanedioL ' and 0.75 parts by mass of titanium dihydroxybis(triethano laminate) as a polycondensation catalyst, and it was reacted at 180°C under a stream of nitrogen for 8 hours with generated water distilled.
- a reactor equipped with a cooling tube, a stirrer and a nitrogen inlet tube was charged with- " 241 parts by mass of sebacic acid; 31 parts by mass of adipic acid; 164 parts by mass of 1,4-butanediol; and 0.75 parts by mass of titanium dihydroxybis(triethanolaminate) as a polycondensation catalyst, and it was reacted at 180°C under a stream of nitrogen for 8 hours with generated water distilled.
- a reactor equipped with a cooling tube, a stirrer and a nitrogen inlet tube was charged with: 321 parts by mass of dimethyl
- a reactor equipped with a stirring rod and a thermometer was charged with 170 parts by mass of isophoronediamine and 75 parts by mass of methyl ethyl ketone, which was reacted at 50°C for 5 hours.
- HENSCHEL mixer (HENSCHEL 20B, manufactured by Mitsui Mining
- a reactor equipped with a thermometer and a stirrer was charged with 70 parts by mass of (Polyester Resin l) and 70 parts by mass of ethyl acetate for sufficient dissolution. Then, 30 parts by mass of (Wax Dispersion), 2 parts by mass of (Organically Modified Layered Inorganic Mineral Masterbatch), 36.5 parts by mass of (Masterbatch 2) and 37 parts by mass of ethyl acetate were added therein and stirred at a rotational speed of 10,000 rpm by a TK HOMOMIXER (manufactured by Primix Corporation) for uniform dissolution or dispersion.
- TK HOMOMIXER manufactured by Primix Corporation
- HOMOMIXER (at a rotational speed of 6,000 rpm for 5 minutes) and then filtered.
- Toner Base Particles 1 100 parts by mass of obtained (Toner Base Particles 1) was mixed with 1.0 part by mass of hydrophobic silica (HDK-2000, manufactured by Wacker Chemie) using a HENSCHEL mixer, and (Toner 1) having a volume-average particle diameter of 5.8 ⁇ was prepared.
- Table 2-1 and Table 2-2 below show types of the masterbatches and amounts of the resins for a masterbatch used in the examples and comparative examples.
- Example 11 except that the type of the masterbatch and the amount of the resin for a masterbatch were changed in Examples 12 to 20 and
- polyoxyethylene lauryl ether (NL450, manufactured by DaHchi Kogyo Seiyaku Co., Ltd.), and 10 parts by mass of ethyl acetate were mixed and stirred at 40°C in a separate reactor equipped with a stirrer and a thermometer to prepare an aqueous-phase solution.
- 50 parts by mass of (Oil Phase 11) maintained at 50°C was added, and it was mixed at 40°C to 50°C in a TK
- a filter cake was obtained by subjecting 100 parts by mass of
- HOMOMIXER (at a rotational speed of 6,000 rpm for 5 minutes) and then filtered.
- hydrophobic silica (HDK-2000, manufactured by Wacker Chemie) was mixed in 100 parts by mass of obtained (Toner Base Particles 11) using a HENSCHEL mixer, and (Toner 11) having a volume-average particle diameter of 5.8 ⁇ was prepared.
- Toner 12 was produced in the same manner as Example 21 except that the crystalline resin used was changed from (Crystalline
- thermometer thermometer and a stirrer and sufficiently dissolved.
- Carriers used in two-component developers of examples and comparative examples were produced as follows.
- a core material 5,000 parts by mass of Mn ferrite particles (weight-average diameter: 35 ⁇ ) were used.
- a coating material a coating solution prepared by dispersing 450 parts by mass of toluene, 450 parts by mass of a silicone resin SR2400 (manufactured by Dow Corning Toray Co., Ltd., non-volatile content of 50% by mass), 10 parts by mass of an aminosilane SH6020 (manufactured by Dow Corning Toray Co., Ltd.) and 10 parts by mass of carbon black by a stirrer for 10 minutes was used.
- the core material and the coating solution were placed in a coating apparatus equipped with a rotary bottom plate disc and a stirring blade, where coating is carried out while forming a swirling flow in a fluidized bed, and the coating solution was applied on the core material.
- An obtained coated matter was baked in an electric furnace at 250°C for 2 hours. Thereby, (Carrier) was obtained.
- the mixing was carried out by placing 200 g of the carrier and 14 g of the toner in a stainless- steel container having an internal volume of 500 mL.
- Obtained two-component developers were loaded in a developing unit of a tandem image forming apparatus for image formation, which adopts an indirect transfer method with a contact charging method, a two-component developing system, an indirect transfer method, a secondary transfer method, a blade cleaning method and an externally heated roller fixing method. Performances of the toners and the developers were evaluated by evaluating the obtained images.
- Resin components included in a toner may be separated using a difference in solubility. Specifically, the toner is added in
- the colorant and the external additive are removed, and an obtained solution is concentrated. Thereafter, an obtained resin composition is dissolved in ethyl acetate, and thereby the crystalline polyester resin as an insoluble component may be separated.
- the crystalline polyester resin Since the crystalline polyester resin has low solubility to a polar solvent, it exists as an insoluble component right after it is added in ethyl acetate.
- the binder resin of the non-crystalline resin and the resin for a masterbatch are initially soluble in ethyl acetate, but the resin for a masterbatch becomes insoluble over time.
- the binder resin of the non-crystalline resin and the resin for a masterbatch may be separated.
- the binder resin (crystalline resin), the binder resin (noncrystalline resin) and the resin for a masterbatch included in the toner may be separated.
- a measurement apparatus and measurement conditions of the molecular weight were as follows.
- the glass transition temperature was measured by subjecting 5 mg to 10 mg of a measurement sample filled in a simple sealed pan made of aluminum to the following measurement procedure. First heating: it was heated from 30°C to 220°C at a heating rate of 5°C/min and maintained for 1 minute;
- Cooling it was quenched to -60°C without temperature control and maintained for 1 minute, '
- Second heating it was heated from -60°C to 180°C at a heating rate of 5°C/min.
- the glass transition temperature a glass transition temperature read from a thermogram of the second heating based on a midpoint method described by ASTM D3418/82 was measured.
- a measurement apparatus and measurement conditions of the transmittance were as follows.
- Measurement container glass cell (optical path length: l cm)
- a measurement method of the transmittance was the above- described method.
- a toner was filled in a 50-mL glass container, allowed to stand in a thermostatic chamber at 50°C for 24 hours and cooled to 24°C.
- a penetration (mm) of the obtained toner was measured by a penetration test (JIS K2235-1991), and heat-resistant storage stability was evaluated based on the following criteria.
- larger penetration indicates superior heat-resistant storage stability, and a toner having penetration of less than 5 mm has a high possibility of causing a problem in use.
- the evaluation criteria were as follows.
- the penetration was 20 mm or greater.
- the penetration was 10 mm or greater and less than 20 mm.
- Pigment dispersibility was evaluated based on the following evaluation criteria.
- A The pigment was uniformly dispersed in the toner.
- the pigment was uniformly dispersed, but a part of the pigment is unevenly distributed on the surface of the toner.
- Table 2-1 and Table 2-2 show evaluation results.
- Amount of resin for masterbatch used denotes an amount used in a toner with respect to 100 parts by mass of a total amount of a binder resin and a resin for a masterbatch.
- the toner including the resin composition of the present embodiment has superior dispersibility of the colorant and superior heat-resistant storage stability and low-temperature fixing property.
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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US14/409,267 US9606464B2 (en) | 2012-06-27 | 2013-06-13 | Resin composition for toner, toner, developer and image forming apparatus |
KR1020147036879A KR20150016607A (en) | 2012-06-27 | 2013-06-13 | Resin composition for toner, toner, developer and image forming apparatus |
BR112014032525A BR112014032525A2 (en) | 2012-06-27 | 2013-06-13 | resin composition for toner, toner, developer and imaging device |
RU2015102272/04A RU2581041C1 (en) | 2012-06-27 | 2013-06-13 | Resin composition for toner, toner, developer and image forming apparatus |
IN2934KON2014 IN2014KN02934A (en) | 2012-06-27 | 2013-06-13 | |
CN201380043565.1A CN104583875B (en) | 2012-06-27 | 2013-06-13 | Resin composition for toner, toner, developer and image forming apparatus |
EP13810276.9A EP2867730B1 (en) | 2012-06-27 | 2013-06-13 | Resin composition for toner, toner, developer and image forming apparatus |
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EP (1) | EP2867730B1 (en) |
JP (1) | JP2014194514A (en) |
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CN (1) | CN104583875B (en) |
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JP6194601B2 (en) | 2012-09-10 | 2017-09-13 | 株式会社リコー | Toner, developer and image forming apparatus |
JP6657832B2 (en) | 2015-11-18 | 2020-03-04 | 株式会社リコー | Bright toner, toner storage unit, image forming apparatus, and image forming method |
JP6551544B2 (en) | 2016-01-18 | 2019-07-31 | 株式会社リコー | Toner, developer, and image forming apparatus |
JP2018180239A (en) | 2017-04-12 | 2018-11-15 | 株式会社リコー | Toner, toner storage unit, image forming apparatus, and image forming method |
EP3457214A1 (en) | 2017-09-19 | 2019-03-20 | Ricoh Company, Ltd. | Toner set, image forming apparatus, and image forming method |
US10451987B2 (en) | 2017-12-25 | 2019-10-22 | Ricoh Company, Ltd. | Toner, image forming apparatus, image forming method, and toner accommodating unit |
JP7257741B2 (en) | 2018-01-18 | 2023-04-14 | 株式会社リコー | TONER, TONER CONTAINING UNIT, AND IMAGE FORMING APPARATUS |
JP7270895B2 (en) | 2018-11-29 | 2023-05-11 | 株式会社リコー | TONER, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND TONER CONTAINING UNIT |
JP2022117310A (en) * | 2021-01-29 | 2022-08-10 | 富士フイルムビジネスイノベーション株式会社 | Electrostatic image development toner, electrostatic image developer, toner cartridge, process cartridge, and image forming device |
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2013
- 2013-06-04 JP JP2013117494A patent/JP2014194514A/en active Pending
- 2013-06-13 US US14/409,267 patent/US9606464B2/en not_active Expired - Fee Related
- 2013-06-13 WO PCT/JP2013/066898 patent/WO2014002854A1/en active Application Filing
- 2013-06-13 RU RU2015102272/04A patent/RU2581041C1/en active
- 2013-06-13 BR BR112014032525A patent/BR112014032525A2/en active Search and Examination
- 2013-06-13 IN IN2934KON2014 patent/IN2014KN02934A/en unknown
- 2013-06-13 EP EP13810276.9A patent/EP2867730B1/en not_active Not-in-force
- 2013-06-13 CN CN201380043565.1A patent/CN104583875B/en not_active Expired - Fee Related
- 2013-06-13 KR KR1020147036879A patent/KR20150016607A/en active Search and Examination
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JPH0479257B2 (en) | 1984-01-19 | 1992-12-15 | Tokyo Shibaura Electric Co | |
JP2006171691A (en) * | 2004-11-18 | 2006-06-29 | Kao Corp | Method of producing toner for electrophotography |
EP2085418A1 (en) | 2006-11-13 | 2009-08-05 | Toyo Boseki Kabushiki Kaisha | Hyperbranched ester polymer, and electrophotographic toner and pigment master batch using the polymer |
US20100062355A1 (en) | 2008-07-31 | 2010-03-11 | Canon Kabushiki Kaisha | Cyan toner |
US20110045398A1 (en) | 2009-02-27 | 2011-02-24 | Canon Kabushiki Kaisha | Black toner |
JP2012063478A (en) * | 2010-09-15 | 2012-03-29 | Ricoh Co Ltd | Toner for image formation, single-component developer, two-component developer, image forming method, image forming apparatus and process cartridge |
Also Published As
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BR112014032525A2 (en) | 2017-06-27 |
IN2014KN02934A (en) | 2015-05-08 |
EP2867730B1 (en) | 2017-09-27 |
EP2867730A1 (en) | 2015-05-06 |
RU2581041C1 (en) | 2016-04-10 |
KR20150016607A (en) | 2015-02-12 |
US9606464B2 (en) | 2017-03-28 |
JP2014194514A (en) | 2014-10-09 |
CN104583875A (en) | 2015-04-29 |
EP2867730A4 (en) | 2015-06-24 |
US20150153671A1 (en) | 2015-06-04 |
CN104583875B (en) | 2018-11-06 |
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