CN112740112A - Elastic roller - Google Patents
Elastic roller Download PDFInfo
- Publication number
- CN112740112A CN112740112A CN201980060744.3A CN201980060744A CN112740112A CN 112740112 A CN112740112 A CN 112740112A CN 201980060744 A CN201980060744 A CN 201980060744A CN 112740112 A CN112740112 A CN 112740112A
- Authority
- CN
- China
- Prior art keywords
- silicone oil
- layer
- isocyanate compound
- elastic
- modified silicone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- -1 isocyanate compound Chemical class 0.000 claims abstract description 88
- 239000002245 particle Substances 0.000 claims abstract description 65
- 239000012948 isocyanate Substances 0.000 claims abstract description 63
- 229920002545 silicone oil Polymers 0.000 claims abstract description 57
- 239000010410 layer Substances 0.000 claims abstract description 54
- 239000000203 mixture Substances 0.000 claims abstract description 54
- 239000002344 surface layer Substances 0.000 claims abstract description 47
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 38
- 239000004945 silicone rubber Substances 0.000 claims abstract description 37
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 12
- 238000007865 diluting Methods 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 229920005862 polyol Polymers 0.000 claims description 35
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 150000002513 isocyanates Chemical class 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 10
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- WHIVNJATOVLWBW-UHFFFAOYSA-N n-butan-2-ylidenehydroxylamine Chemical compound CCC(C)=NO WHIVNJATOVLWBW-UHFFFAOYSA-N 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 229920001971 elastomer Polymers 0.000 description 18
- 239000005060 rubber Substances 0.000 description 18
- 239000000853 adhesive Substances 0.000 description 16
- 239000007788 liquid Substances 0.000 description 16
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- 230000001070 adhesive effect Effects 0.000 description 15
- 150000003077 polyols Chemical class 0.000 description 11
- 238000011282 treatment Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 150000003609 titanium compounds Chemical class 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
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- 238000011156 evaluation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 150000003755 zirconium compounds Chemical class 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 125000003342 alkenyl group Chemical group 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
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- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
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- 125000000962 organic group Chemical group 0.000 description 3
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- VZXPHDGHQXLXJC-UHFFFAOYSA-N 1,6-diisocyanato-5,6-dimethylheptane Chemical compound O=C=NC(C)(C)C(C)CCCCN=C=O VZXPHDGHQXLXJC-UHFFFAOYSA-N 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- CBOIHMRHGLHBPB-UHFFFAOYSA-N hydroxymethyl Chemical compound O[CH2] CBOIHMRHGLHBPB-UHFFFAOYSA-N 0.000 description 2
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 1
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 1
- CDMDQYCEEKCBGR-UHFFFAOYSA-N 1,4-diisocyanatocyclohexane Chemical compound O=C=NC1CCC(N=C=O)CC1 CDMDQYCEEKCBGR-UHFFFAOYSA-N 0.000 description 1
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 1
- LFSYUSUFCBOHGU-UHFFFAOYSA-N 1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=CC=C1N=C=O LFSYUSUFCBOHGU-UHFFFAOYSA-N 0.000 description 1
- ICLCCFKUSALICQ-UHFFFAOYSA-N 1-isocyanato-4-(4-isocyanato-3-methylphenyl)-2-methylbenzene Chemical compound C1=C(N=C=O)C(C)=CC(C=2C=C(C)C(N=C=O)=CC=2)=C1 ICLCCFKUSALICQ-UHFFFAOYSA-N 0.000 description 1
- 125000001731 2-cyanoethyl group Chemical group [H]C([H])(*)C([H])([H])C#N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- WUKNPIYSKBLCQI-UHFFFAOYSA-N CC(C=C1)=CC=C1C1=CC=C(C)C=C1.N=C=O.N=C=O Chemical compound CC(C=C1)=CC=C1C1=CC=C(C)C=C1.N=C=O.N=C=O WUKNPIYSKBLCQI-UHFFFAOYSA-N 0.000 description 1
- KFDGIFZCOIOUIL-UHFFFAOYSA-N CCCCO[Zr](OCCCC)OCCCC Chemical compound CCCCO[Zr](OCCCC)OCCCC KFDGIFZCOIOUIL-UHFFFAOYSA-N 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical group 0.000 description 1
- 229910000915 Free machining steel Inorganic materials 0.000 description 1
- IIGAAOXXRKTFAM-UHFFFAOYSA-N N=C=O.N=C=O.CC1=C(C)C(C)=C(C)C(C)=C1C Chemical compound N=C=O.N=C=O.CC1=C(C)C(C)=C(C)C(C)=C1C IIGAAOXXRKTFAM-UHFFFAOYSA-N 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
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- 239000004902 Softening Agent Substances 0.000 description 1
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- 230000004323 axial length Effects 0.000 description 1
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- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 125000003438 dodecyl group Chemical group [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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 125000005843 halogen group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000006038 hexenyl group Chemical group 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052742 iron Inorganic materials 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
- 239000003273 ketjen black Substances 0.000 description 1
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- AYLRODJJLADBOB-QMMMGPOBSA-N methyl (2s)-2,6-diisocyanatohexanoate Chemical compound COC(=O)[C@@H](N=C=O)CCCCN=C=O AYLRODJJLADBOB-QMMMGPOBSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- 150000002902 organometallic compounds Chemical class 0.000 description 1
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- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
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- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
An elastic roller is provided with: a shaft body; and an elastic layer provided on an outer peripheral surface of the shaft body; and a surface layer disposed on an outer side of the elastic layer; the surface layer is obtained by coating and curing a mixture of the following (a) component to (D) component; (A) a binder main component obtained by polymerizing a composition containing both-end-modified silicone oil and an isocyanate compound, (B) a blocked isocyanate compound, (C) silicone rubber particles and/or acrylic particles having a particle diameter of 0.2 to 10 [ mu ] m, and (D) a diluting solvent.
Description
Technical Field
The present invention relates to an elastic roller.
Background
A developing roller used in an image forming apparatus such as a copying machine, a printer, and a facsimile machine employing an electrophotographic system has a function of conveying a developer to an image carrier on which an electrostatic latent image is formed. The developer conveying performance of the developing roller affects the quality of the image forming apparatus, particularly the print density. Therefore, it has been studied to improve the developer conveying performance of the developing roller by forming irregularities on the surface of the developing roller and adjusting the electrical characteristics of various materials constituting the developing roller.
Here, when the developing roller is used for a long time, the developer sometimes adheres to the surface thereof (referred to as "filming"). Such film formation is considered to be caused by, for example, deformation or breakage of the developer due to sliding stress of a blade or the like pressed against the elastic roller when the developer is charged or adhered, and further melting of the developer due to frictional heat with the blade or the like. In general, in the production of a developing roller, it is required to provide an elastic roller which suppresses the occurrence of filming as much as possible and stabilizes durable printing performance.
As a conventional elastic roller, for example, patent document 1 discloses an elastic roller having a surface layer obtained by applying and curing a mixture containing (a) a liquid binder containing a polyol, an isocyanate compound and a reactive silicone oil, (B) silicone rubber particles, and (C) a diluent solvent.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5878268
Disclosure of Invention
Problems to be solved by the invention
Here, when the liquid adhesive containing the reactive silicone oil and the isocyanate compound described in patent document 1 is used, the crosslinking reaction proceeds with the preparation of the liquid adhesive, so that the viscosity of the liquid adhesive increases, and the processability in the production of the elastic roller is lowered.
The present invention has been made in view of the above problems, and an object thereof is to provide an elastic roller which can suppress the occurrence of film formation well and has excellent workability and good productivity in manufacturing.
Means for solving the problems
As a result of extensive studies, the inventors of the present invention have found that an elastic roller having a surface layer formed by applying and curing a mixture containing at least a binder main agent obtained by polymerizing a composition containing a both-end modified silicone oil and an isocyanate compound and a blocked isocyanate compound can satisfactorily suppress the occurrence of film formation and is excellent in productivity, and have completed the present invention. Specifically, the present invention provides the following.
(1) One embodiment of the present invention is an elastic roller including: a shaft body; and an elastic layer provided on an outer peripheral surface of the shaft body; and a surface layer disposed on an outer side of the elastic layer; wherein the surface layer is obtained by coating and curing a mixture of the following (A) component to (D) component; (A) a binder main component obtained by polymerizing a composition containing both-end-modified silicone oil and an isocyanate compound, (B) a blocked isocyanate compound, (C) silicone rubber particles and/or acrylic particles having a particle diameter of 0.2 to 10 [ mu ] m, and (D) a diluting solvent.
(2) The elastic roller according to the embodiment (1) above, wherein the component (a) is a binder base obtained by polymerizing a composition containing both-terminal-modified silicone oil, one-terminal-glycol-modified silicone oil, and an isocyanate compound.
(3) The elastic roller according to the embodiment (1) above, wherein the component (a) is a binder main component obtained by polymerizing a composition containing both-terminal-modified silicone oil, one-terminal-diol-modified silicone oil, an isocyanate compound, and a carbonate polyol and/or a hydrogenated butadiene polyol.
(4) The elastic roller as described in any one of the embodiments (1) to (3) above, wherein the component (B) is an isocyanurate type block isocyanate end-blocked by methyl ethyl ketoxime or an adduct type block isocyanate end-blocked by methyl ethyl ketoxime.
(5) The elastic roller as described in any one of the above (1) to (4), further having an adhesive layer between the elastic layer and the surface layer; wherein the adhesive layer contains an organic titanium compound and/or an organic zirconium compound.
Effects of the invention
The elastic roller of the present invention coats and cures a mixture containing at least a binder main agent obtained by polymerizing a composition containing both-end-modified silicone oil and an isocyanate compound, and a blocked isocyanate compound, at the time of forming a surface layer. Therefore, since the reaction between the isocyanate compound and the binder main agent having a hydroxyl group after the preparation of the mixture can be easily controlled, the viscosity of the mixture does not increase and the processability is excellent. Further, since the surface layer of the elastic roller formed of the mixture has a low relative dielectric constant, the occurrence of film formation can be favorably suppressed even when the elastic roller is used for a long time.
Drawings
Fig. 1 is a schematic view showing an elastic roller of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
< elastic roller >
The elastic roller 1 of the present invention includes a shaft body 2, an elastic layer 3 provided on an outer surface of the shaft body 2, and a surface layer 4 provided outside the elastic layer 3. The elastic roller 1 of the present invention is preferably used as a developing roller, but is not limited to such use.
[ Axis body ]
The shaft body 2 is preferably a shaft body used for a conventional existing elastic roller having a conductive property. Preferably, the shaft body 2 is made of at least one metal selected from the group consisting of iron, aluminum, stainless steel, and brass, for example. Such a shaft body 2 is also commonly referred to as a "core metal".
The shaft body 2 may also include an insulating resin. The insulating resin may be a thermoplastic resin or a thermosetting resin, for example. The shaft body 2 may include a core made of, for example, an insulating resin and a plating layer provided on the core. Such a shaft body 2 can be obtained by plating a core body made of an insulating resin to make it conductive, for example.
The shaft body 2 is preferably a core metal to obtain good conductive characteristics.
The shaft body 2 is preferably rod-shaped or tubular. The cross-sectional shape of the shaft body 2 may be circular or elliptical, or may be non-circular, such as polygonal. The outer peripheral surface of the shaft body 2 may be subjected to a cleaning treatment, a degreasing treatment, a primer treatment, or the like.
The axial length of the shaft body 2 is not particularly limited, and may be appropriately adjusted according to the form of the image forming apparatus to be installed. The diameter of the shaft body 2 (the diameter of the circumscribed circle) is not particularly limited, and may be adjusted as appropriate according to the form of the image forming apparatus to be installed.
The elastic layer 3 is made of a rubber material containing silicone rubber. Since the elastic layer 3 contains silicone rubber, compression set can be reduced, and an effect of excellent flexibility in a low-temperature environment can be obtained.
Examples of the silicone rubber include crosslinked products of organopolysiloxanes such as dimethylpolysiloxanes and diphenylpolysiloxanes. In addition, silicone rubbers may also be modified products thereof.
The elastic layer 3 preferably mainly contains silicone rubber. Specifically, the content of the silicone rubber in the elastic layer 3 is preferably 30 mass% or more, more preferably 40 mass% or more, and still more preferably 60 mass% or more, based on the total mass of the elastic layer 3.
The elastic layer 3 may contain a component other than the rubber material. For example, the elastic layer 3 may further contain a conductivity-imparting agent. The conductivity-imparting agent may be any component for imparting conductivity to the elastic layer 3, and is not particularly limited. Examples of the conductivity-imparting agent include conductive powders containing conductive carbon, carbon for rubber, metal, conductive polymer, and the like. Carbon black is preferably used as the conductive powder, and examples of the carbon black include: furnace Black such as Ketjen Black (registered trademark), acetylene Black, channel Black, thermal Black, and the like.
In the elastic roller 1, the elastic layer 3 is formed such that the outer circumferential surface of the shaft body 2 is exposed at both ends in the axial direction of the shaft body 2. That is, there is a region where the elastic layer 3 is not provided on the outer peripheral surface of the shaft body 2. However, in the present invention, the form of the elastic layer 3 is not limited to this form, and the elastic layer 3 may be provided so as to cover the entire outer peripheral surface of the shaft body 2.
The elastic layer 3 may be a solid layer, preferably without cavities inside the layer. In the present specification, "solid" means that the inner nonexistent area of the layer is 0.1mm2The cavity of the above/one.
The JIS a hardness of the elastic layer 3 is preferably 20 or more and 55 or less. Since the JIS a hardness (JIS K6301) of the elastic layer 3 is in the above range, the contact area (nip width) between the elastic roller 1 and the contacted body (for example, an image bearing body such as a photoreceptor) becomes large, so that the performances such as transfer efficiency, charging efficiency, and developing efficiency tend to be further improved. In addition, the possibility of mechanical damage to the body to be contacted is reduced.
The thickness of the elastic layer 3 is preferably 0.5mm or more and 10mm or less, and more preferably 1mm or more and 5mm or less, from the viewpoint of ensuring uniform nip width with the abutment object in the abutment state with the abutment object. Further, in the present specification, "thickness" refers to a thickness in a direction perpendicular to the axial direction of the elastic roller 1. The outer diameter of the elastic layer 3 is not particularly limited. For example, the outer diameter may be 5mm or more and 20mm or less. Further, in the present specification, "outer diameter" refers to an outer diameter in a cross section perpendicular to the axial direction of the elastic roller 1. The thickness and outer diameter of the elastic layer 3 can be adjusted by adjusting the amount of the rubber composition used when forming the elastic layer 3, or by polishing or grinding the outer peripheral surface of the elastic layer 3 after forming the elastic layer 3, or the like.
The outer peripheral surface of the elastic layer 3 may be subjected to surface treatment such as primer treatment, corona treatment, plasma treatment, excimer treatment, UV treatment, ITRO treatment, and flame treatment.
The elastic layer 3 may be a cured product of a rubber composition shown below.
(rubber composition)
The rubber composition preferably contains a rubber component of a silicone rubber formed by crosslinking. Examples of such a rubber component include silicone raw rubbers such as organopolysiloxane.
Examples of the organopolysiloxane include organopolysiloxanes represented by the following average composition formula.
RnSiO(4-n)/2
[ wherein R represents a monovalent hydrocarbon group which may be substituted. The number of carbon atoms of the hydrocarbon group is preferably 1 to 12; more preferably 1 to 8. Two or more R's may be the same or different. n represents a number of 1.95 to 2.05. ]
Examples of R in the above formula include: alkyl groups such as methyl, ethyl, propyl, butyl, hexyl and dodecyl; cycloalkyl groups such as cyclohexyl; alkenyl groups such as vinyl, allyl, butenyl, hexenyl, and the like; aryl groups such as phenyl and tolyl; aralkyl groups such as β -phenylpropyl; and organic groups in which a part or all of hydrogen atoms bonded to carbon atoms of the above groups such as chloromethyl, trifluoropropyl, cyanoethyl are substituted with halogen atoms, cyano groups, or the like.
The organopolysiloxane is preferably an organopolysiloxane that contains in one molecule at least two silicon atom-bonded alkenyl groups. For example, in the above formula, it is preferable that at least two of R have the above alkenyl group. The organopolysiloxane more preferably has a vinyl group.
Specific examples of the organopolysiloxane include dimethylpolysiloxane and diphenylpolysiloxane. The molecular chain end of the organopolysiloxane is preferably blocked with a trimethylsilyl group, a dimethylvinylsilyl group, a dimethylhydroxysilyl group, a trivinylsilyl group, or the like.
The rubber composition may also contain various additives. Examples of such additives include: an electrical conductivity-imparting agent, an auxiliary agent such as a chain extender and a crosslinking agent, a catalyst such as an addition reaction catalyst, a reaction-controlling agent, a dispersant, an antiaging agent, an antioxidant, a filler, a pigment, a colorant, a processing aid, a softening agent, a plasticizer, an emulsifier, a heat resistance-improving agent, a flame retardancy-improving agent, an acid-absorbing agent, a thermal conductivity-improving agent, a mold-releasing agent, a solvent, and the like.
The rubber composition may be a liquid rubber composition or a kneading rubber composition.
[ surface layer ]
The surface layer 4 is provided on the outermost surface of the elastic roller 1. In order to prevent film formation in the elastic roller 1, at least the properties of the surface layer 4 need to be adjusted. In the present invention, the surface layer 4 is formed by applying and curing a mixture of the following components (a) to (D).
(A) An adhesive main agent obtained by polymerizing a composition comprising a both-terminal modified silicone oil and an isocyanate compound,
(B) a blocked isocyanate compound which is a mixture of a blocked isocyanate compound,
(C) silicone rubber particles and/or acrylic particles having a particle diameter of 0.2 to 10 μm,
(D) and (4) diluting the solvent.
Further, the above mixture is in a liquid state before being thermally cured.
((A) Binder base)
The adhesive base is obtained by polymerizing a composition comprising both-end modified silicone oil and an isocyanate compound. The composition may further contain a single-terminal diol-modified silicone oil, a carbonate polyol and/or a hydrogenated butadiene polyol, if necessary, but it must not contain polyols other than the carbonate polyol and the hydrogenated butadiene polyol. When the composition contains a polyol other than the carbonate polyol and the hydrogenated butadiene polyol, the compatibility with the block isocyanate compound of the component (B) described later is lowered, resulting in poor curing of the mixture.
(both ends-modified Silicone oil)
The both-end-modified silicone oil is one of so-called reactive silicone oils, and has a property of polymerizing with an isocyanate compound and a blocked isocyanate compound of the component (B) described later. Therefore, the both-end modified silicone oil is preferably modified at both ends of the silicone chain with an amino group (primary or secondary), a mercapto group, or a hydroxyl group. The both-terminal modified silicone oil may be commercially available both-terminal amino-modified silicone oil, both-terminal mercapto-modified silicone oil, both-terminal carboxyl-modified silicone oil, both-terminal phenol-modified silicone oil, or both-terminal carbinol-modified silicone oil.
Here, preferable both-end-modified silicone oil used in the present invention includes both-end-modified silicone oil represented by the following general formula (1).
[ solution 1]
In the general formula (1), R represents-C3H6OC2H4OH, or-C3H6OCH2-C(CH2OH)2C2H5And n represents an integer of 20 or less.
Among the both-terminal modified silicone oils represented by the general formula (1), it is particularly preferable to use silicone oils in which R at both terminals is-C3H6OC2H4OH, and n is about 10. For such silicone oil, commercially available silicone oils can be suitably obtained.
Further, in the general formula (1), although the functional group bonded to the silicon atom is a methyl group, the methyl group may be both terminal-modified silicone oil substituted with a hydrogen atom.
By containing the both-end modified silicone oil in the mixture for forming the surface layer 4, appropriate elasticity can be imparted to the surface layer, and the electrical characteristics of the surface layer 4 can be adjusted to lower the relative permittivity of the surface layer, whereby the occurrence of filming can be effectively suppressed.
(Single-terminal diol-modified Silicone oil)
Although the one-terminal diol-modified silicone oil is a reactive silicone oil as well as the two-terminal modified silicone oil, it has two hydroxyl groups bonded to one terminal of the siloxane chain. In general, when the both-terminal modified silicone oil and the isocyanate compound are polymerized, linear polyurethane is produced, but by using the one-terminal diol-modified silicone oil in combination, a branched chain can be introduced into polyurethane, and the nano-scale fine roughness of the elastic roller 1 can be improved.
Examples of the one-terminal diol-modified silicone oil include one-terminal modified silicone oils represented by the following general formula (2).
[ solution 2]
In the general formula (2), R' represents-C3H6OCH2-C(CH2OH)2C2H5And n represents an integer of 20 or less.
Among the single-terminal diol-modified silicone oils represented by the general formula (2), silicone oils having n of about 10 are particularly preferably used. Further, in the general formula (2), although the functional group bonded to the silicon atom is a methyl group, the methyl group may be a silicone oil substituted with a hydrogen atom.
In the present invention, the one-terminal diol-modified silicone oil used for preparing the adhesive base material is preferably 0.1 part by mass or more and 10 parts by mass or less, more preferably 2 parts by mass or more and 6 parts by mass or less, relative to 100 parts by mass of the both-terminal modified silicone oil. By controlling the amount of the one-terminal diol-modified silicone oil used relative to the both-terminal modified silicone oil within the above range and by adjusting the surface roughness of the surface layer 4, it is possible to well maintain the developing performance and effectively prevent filming.
(isocyanate Compound)
In the present invention, the isocyanate compound used as the main agent for preparing the adhesive is not particularly limited as long as it is reactive with the reactive group introduced into the silicone oil, and examples thereof include diisocyanates such as diphenylmethane diisocyanate (MDI), Toluene Diisocyanate (TDI), and Hexamethylene Diisocyanate (HDI), and biuret modified, isocyanurate modified, urethane modified, and the like thereof. Among these isocyanate compounds, hexamethylene diisocyanate and its biuret modified form, isocyanurate modified form, urethane modified form, and the like are preferably used. The longer the molecular chain of the isocyanate compound is, the more flexible the polyurethane can be produced.
In the present invention, the isocyanate compound used for preparing the binder main agent is preferably 5 parts by mass or more and 85 parts by mass or less, and more preferably 15 parts by mass or more and 75 parts by mass or less, with respect to 100 parts by mass of the both-terminal-modified silicone oil. When the amount of the isocyanate compound used for the both-end-modified silicone oil is within the above range, the viscosity of the mixture for forming the surface layer 4 can be made appropriate, and the processability can be improved.
(carbonate polyol, hydrogenated butadiene polyol)
The carbonate polyol and the hydrogenated butadiene polyol are those which react with the isocyanate compound described above or the blocked isocyanate compound described later to form a polyurethane, but unlike other polyols, the carbonate polyol and the hydrogenated butadiene polyol are excellent in compatibility with the blocked isocyanate compound. The inventors of the present invention found that when another polyol is used, layer separation occurs between the polyol and the blocked isocyanate, resulting in poor curing, and therefore, in the composition for forming the adhesive main agent, polyols other than the carbonate polyol and the hydrogenated butadiene polyol cannot be used, and found that the above-mentioned problems are not caused because the carbonate polyol and the hydrogenated butadiene polyol have good compatibility with the blocked isocyanate compound. Therefore, by using these polyols, the skin layer 4 having good characteristics can be formed.
The carbonate polyol and/or hydrogenated butadiene polyol is preferably 5 parts by mass or more and 40 parts by mass or less, and more preferably 10 parts by mass or more and 30 parts by mass or less, per 100 parts by mass of the both-terminal modified silicone oil. As these polyols, commercially available polyols can be used.
(B) Block isocyanate Compound)
The blocked isocyanate compound is prepared by deriving various isocyanate compounds (e.g., aromatic isocyanate compound, aliphatic isocyanate compound, alicyclic isocyanate compound) generally used for preparing polyurethane into an adduct type or an isocyanurate type, and an isocyanurate type blocked isocyanate or an adduct type blocked isocyanate end-blocked with methyl ethyl ketoxime may be used.
Among these isocyanate compounds, aromatic isocyanate compounds include, for example: 2, 4-tolylene diisocyanate (2, 4-TDI), 2, 6-tolylene diisocyanate (2, 6-TDI), 4 '-diphenylmethane diisocyanate (4, 4' -MDI), 2, 4 '-diphenylmethane diisocyanate (2, 4' -MDI), 1, 4-phenylene diisocyanate, polymethylene polyphenylene polyisocyanate, dimethylbiphenyl diisocyanate (TODI), 1, 5-Naphthalene Diisocyanate (NDI), 3 '-dimethylbiphenyl-4, 4' -diisocyanate, and the like. Examples of the aliphatic isocyanate compound include: hexamethylene Diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMHDI), lysine diisocyanate, norbornene diisocyanate methyl (NBDI), Xylylene Diisocyanate (XDI), tetramethylxylene diisocyanate (TMXDI) and the like. Further, as the alicyclic polyisocyanate, for example, there can be mentioned: trans-cyclohexane-1, 4-diisocyanate, isophorone diisocyanate (IPDI), H6XDI (hydrogenated XDI), H12MDI (hydrogenated MDI), 4' -dicyclohexylmethane diisocyanate, and the like.
In the present invention, since the blocked isocyanate compound is used in the production of polyurethane, the viscosity of the mixed liquid for forming the surface layer 4 does not increase even after a lapse of time after the production, and the processability in the molding of the surface layer 4 is favorably maintained. In this case, since polyols other than the carbonate polyol and the hydrogenated butadiene polyol are not used in preparing the adhesive base, the compatibility between the block isocyanate compound and other components can be well maintained without causing curing failure.
In the present invention, the amount of the blocked isocyanate compound in the mixed liquid used for forming the surface layer 4 is preferably 5 parts by mass or more and 80 parts by mass or less, and more preferably 10 parts by mass or more and 70 parts by mass or less, with respect to 100 parts by mass of the binder main component. By setting the amount of the blocked isocyanate compound to the above range, the hardness of the formed surface layer 4 can be maintained within an appropriate range.
((C) Silicone rubber particles, acrylic acid particles)
The mixed liquid for forming the surface layer 4 contains silicone rubber particles and/or acrylic particles. The particle diameters of the silicone rubber particles and the acrylic particles are preferably 0.2 μm or more and 10 μm or less, and more preferably 0.8 μm or more and 5 μm or less. By making the particle diameters of the silicone rubber particles and the acrylic particles within the above range, the surface roughness of the elastic roller 1 can be appropriately maintained, the conveyance of the developer is kept good, and the resolution is kept at a high level, so that the deterioration of the image quality can be prevented. The particle diameters of the silicone rubber particles and the acrylic particles can be measured by observing the cross section with a microscope after the treatment of cutting the elastic roller 1.
The silicone rubber particles and acrylic particles used in the present invention preferably have heat resistance that does not deform or melt or the like even at a temperature of 100 ℃ or higher, and more preferably have heat resistance at 130 ℃ to 180 ℃. Accordingly, even at the crosslinking temperature of the surface layer 4, deformation of these silicone rubber particles and acrylic particles can be prevented. The heat resistance of the silicone rubber particles and the acrylic particles can be evaluated by confirming that the silicone rubber particles and the acrylic particles do not melt and flow out when pressure and heat are applied in the melt flow indexer.
The hardness of the silicone rubber particles and the acrylic particles is measured by a durometer a (instantaneous) (JIS K6253: 1997), preferably 20 degrees or more and 80 degrees or less, more preferably 50 degrees or more and 75 degrees or less. When the hardness of the silicone rubber particles and the acrylic particles is within the above range, it is possible to effectively prevent the increase in the friction coefficient and the occurrence of adhesion of the surface layer 4 due to the breakage or deformation of the silicone rubber particles and the acrylic particles, and it is possible to prevent the surface layer 4 from being cracked or broken due to an excessive increase in the hardness of the surface layer 4, and it is also possible to prevent an excessive stress from being applied to the toner.
The silicone rubber particles and the acrylic particles may be present (buried) in the surface layer 4, and a part of them may protrude to the surface of the surface layer 4. In addition, they may be unevenly distributed in the surface layer 4 or unevenly distributed on the surface side of the surface layer 4.
Of the silicone rubber particles and acrylic particles, the silicone rubber particles preferably have a structure in which organopolysiloxane or polyorganosilsesquioxane is crosslinked, such as dimethylpolysiloxane, and commercially available acrylic particles can be used as the acrylic particles.
Further, the silicone rubber particles are preferably prepared from an organopolysiloxane or an organopolysiloxane having one or two or more monovalent organic groups having 1 to 20 carbon atoms selected from the following reactive group-containing organic groups such as: alkyl groups such as methyl, ethyl, propyl, and butyl; aryl groups such as phenyl and tolyl; alkenyl groups such as vinyl and allyl; aralkyl groups such as β -phenylethyl and β -phenylpropyl; monovalent halogenated hydrocarbon groups such as chloromethyl and 3, 3, 3-trifluoropropyl; epoxy, amino, mercapto, acryloxy, methacryloxy, and the like; these particles made from organopolysiloxanes or organopolysilsesquioxanes can also be surface treated with organoalkoxysilanes. Examples of such silicone rubber particles include "KMP-597" manufactured by shin-Etsu chemical Co., Ltd, "EP-5500", "EP-2600", "EP-2601", "E-2720", "DY 33-430M", "EP-2720", "EP-9215 Cosmetic Powder (EP-9215Cosmetic Powder)", and "9701 Cosmetic Powder (9701Cosmetic Powder)", which are manufactured by Toyo Corning.
The amount of the silicone rubber particles and/or the acrylic particles used is preferably 15 parts by mass or more and 50 parts by mass or less, and more preferably 20 parts by mass or more and 30 parts by mass or less, with respect to 100 parts by mass of the binder main agent. By setting the usage amount of the silicone rubber particles and/or acrylic particles within the above usage amount range, the surface roughness of the elastic roller 1 can be appropriately maintained, the conveyance of the developer is kept good, and the resolution is kept at a high level, so that deterioration of image quality can be prevented.
((D) Diluent solvent)
As the diluting solvent, an aqueous solvent and an organic solvent may be used, and a low boiling point solvent and a high boiling point solvent may be used in combination according to a desired drying rate.
In the present invention, the solid content concentration in the mixture for forming the surface layer 4 is preferably in the range of 20 mass% or more and 60 mass% or less, and more preferably in the range of 30 mass% or more and 50 mass% or less. If the solid content concentration is low, the liquid tends to drip during the coating process, the time required for drying is long, and if the solid content concentration is high, the coated surface becomes rough, and it is difficult to control the thickness.
In the present invention, as the diluting solvent, it is preferable to use a diluting solvent which swells the above-mentioned silicone rubber particles and acrylic acid particles. Accordingly, the silicone rubber particles and the acrylic particles swell in the mixed liquid, the surface layer 4 can be made free from repulsion and dent, and the silicone rubber particles and the acrylic particles can be suppressed from settling in the mixed liquid.
As such a diluting solvent, organic solvents such as Methyl Ethyl Ketone (MEK), methyl isobutyl ketone (MIBK), Tetrahydrofuran (THF), acetone, ethyl acetate, butyl acetate, toluene, xylene, heptane, cyclohexanone, isophorone, and the like are preferably used.
[ adhesive layer ]
The elastic roller 1 of the present invention may be provided with an adhesive layer between the shaft body 2 and the elastic layer 3, and between the elastic layer 3 and the surface layer 4, and the electrical characteristics of the elastic roller 1 can be adjusted by adjusting the electrical characteristics of the adhesive layer, whereby the developing performance of the elastic roller 1 as a developing roller can be adjusted well.
The adhesive layer preferably contains an organotitanium compound and/or an organozirconium compound, and more preferably contains these organometallic compounds and a silane coupling agent. By using the organic titanium compound, the organic zirconium compound, and the silane coupling agent in combination, the relative dielectric constant of the elastic layer 3 is increased to maintain good developing performance, and good adhesion between the elastic layer 3 and the surface layer 4 can be maintained. As the organic titanium compound, there can be mentioned: alkoxy group-containing titanium compounds, titanium chelate compounds, and the like, and examples of the organic zirconium compound include: alkoxy group-containing zirconium compounds, zirconium chelate compounds, and the like. As these organic titanium compound and organic zirconium compound, can be appropriately used commercially available organic titanium compound and organic zirconium compound.
Examples
The present invention will be described in detail below with reference to examples. Further, the present invention is not limited to the embodiments shown below.
< preparation of adhesive base >
Materials shown below were mixed to prepare a composition for preparing an adhesive main agent, and the composition was maintained at a temperature of 100 ℃ to 120 ℃ for 4 to 6 hours to prepare an adhesive main agent. The detailed formulation when preparing the composition for preparing the adhesive base is shown in table 1.
[ (A) composition for preparing adhesive base)
(A1) Two-terminal hydroxyl modified dimethyl silicone oil
(A2) Single-terminal diol-modified silicone oil
(A3) Carbonic acid diol
(A4) Hydrogenated butadiene diols
(A5) Isocyanate Compound (adduct type isocyanate)
(A6) Isocyanate Compound (isocyanurate type isocyanate)
[ Table 1]
| Adhesive base | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| (A1) | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 |
| (A2) | - | - | - | 3.00 | 3.00 | 3.00 | - | 3.00 | - | 3.00 | - | |
| (A3) | - | - | - | 25.00 | - | - | - | 25 | - | |||
| (A4) | - | - | - | - | 25.00 | 25.00 | - | - | - | - | ||
| (A5) | 15.56 | 15.56 | 15.69 | 20.24 | 17.88 | 17.74 | - | - | - | - | ||
| (A6) | - | 49.23 | 49.23 | - | - | - | - | - | 49.66 | - | - | - |
< preparation of liquid mixture for Forming surface layer >
A mixed solution for forming a surface layer was prepared by mixing a binder main agent with each material described below. The detailed formulation when preparing the mixed solution is shown in table 2.
[ (B isocyanate Compound ]
(B1) Isocyanurate type isocyanate blocked with methyl ethyl ketoxime
(B2) Adduct type isocyanate blocked with methyl ethyl ketoxime
[ (C) Silicone rubber particles, acrylic acid particles ]
(C1) Silicone rubber beads (average particle size 2 μm)
(C2) Acrylic acid fine particles having high recoverability (average particle diameter of 3 μm)
(C3) Acrylic acid fine particles having high recoverability (average particle diameter of 10 μm)
[ (D) Diluent solvent ]
(D1) Acetic acid butyl ester
< adhesion layer >
(F1) Silane coupling agent
(F2) Organic titanium Compound (titanium oligomer)
(F3) Organozirconium compound (tributoxy zirconium monoacetylacetonate)
< examples and comparative examples; production of developing roller >
A silicone primer was applied to the surface of a shaft body (diameter 7.5mm, length 274.1mm) composed of free-cutting steel SUM23, and then dried in a Gill oven at a temperature of 150 ℃. By this operation, the outer peripheral surface of the shaft body is subjected to primer treatment.
An elastic body made of a rubber material is formed on the outer peripheral surface of the shaft body by extrusion molding using a rubber composition made of silicone rubber. Further, in the extrusion molding, a rubber composition formed of a silicone rubber was heated at 360 ℃ for 5 minutes using an infrared heating furnace (IR furnace), and further heated at 200 ℃ for 4 hours using a gill oven to be cured. Accordingly, an elastic layer composed of a cured product of the rubber composition is formed on the outer peripheral surface of the shaft body subjected to the primer treatment. The elastic layer is a solid layer, and the thickness of the elastic layer is 3.50 mm. The electric resistance value of the elastic layer was measured using an R8340 ULTRA high resistance meter (R8340 ULTRA HIGH RESISTANCE METER) (manufactured by ADVANTTEST co., ltd.) and found to be 1.00 × 105Ω。
The adhesive agent constituting the adhesive layer shown in table 2 was coated according to each category of examples and comparative examples, and then the mixed liquids of (a) to (D) shown in table 2 were coated on the elastic layer by a spray coating method. The surface layer is formed on the elastic layer by heating the applied mixture at 150 to 170 ℃ for 30 minutes. The thickness of the surface layer was 10 μm.
< evaluation >
(measurement of printing Density and amount of formed film)
The print density and the amount of formed film were measured for each of the developing rollers manufactured as follows. The image forming apparatus used was model number HL-L2360DN (made by Brother industries Co., Ltd.). As the developing roller of this image forming apparatus, each of the manufactured developing rollers is mounted in the developing apparatus. Then, a solid image was formed under the conditions of a temperature of 23 ℃ and a humidity of 55%, and printing evaluation was confirmed. The film formation state after 4000 sheets of paper were printed and the print density (density gradient ratio between the initial print forming portion and the final print forming portion of solid printing) after 4000 sheets of paper were printed were evaluated. Density was measured using an Alice 500(X-Rite500) densitometer manufactured by Alice (X-Rite) Ltd.
The print density was evaluated according to the following evaluation criteria. In this test, when the print density is evaluated as a or B, it is a pass.
A: density gradient ratio of 96-100%, and clean printed dots
B: the density gradient ratio is 92-95%, and other defects (printed dot roughness) exist
C: density gradient ratio of 91% or less, and other defects
The adhesion (filming) of the toner was evaluated by the amount of adhesion of the developer. Specifically, the mass transferred to the film formation weight measurement jig was measured by sucking the developer adhering to the surface of the developing roller after 4000 sheets of paper were printed. Regarding the film formation evaluation, evaluation was performed based on the quality of the transferred developer according to the following criteria. In this test, when the film amount is evaluated as A or B, it is a pass.
A: 0mg or more and 0.003mg or less
B: more than 0.003mg and less than 0.006mg
C: more than 0.006mg
(compatibility of the liquid mixture for forming the surface layer)
For evaluation of compatibility, the transmittance measured by a spectrophotometer ASV11D manufactured by AS ONE co. The transmittance of less than 60% is evaluated as C, the transmittance of 60% or more is evaluated as B, the transmittance of 70% or more is evaluated as A, and the transmittance of 80% or more is evaluated as S. In the present invention, the compatibility is acceptable when B or more is used.
(stability of liquid mixture for Forming surface layer)
The mixture solution for forming the skin layer was left at room temperature for 0 to 12 hours, and the viscosity was measured every hour to evaluate the stability. C if the viscosity reached 80 mPas or more within 8 hours; b if the viscosity between 0 and 8 hours becomes 50 mPas or more and less than 80 mPas; if the viscosity is suppressed to less than 2050 mPas even when left standing for 1224 hours, it is evaluated as A. In the present invention, the stability is acceptable when it is A or more.
(measurement of relative dielectric constant)
The surface layer and the adhesive layer of the developing roller were measured for relative dielectric constants at 0.01Hz and 100Hz using an LCR meter (manufactured by NF Circuit Design Block co., Ltd.).
The above results are shown in table 2.
[ Table 2]
Description of the reference numerals
1 elastic roller
2 axle body
3 elastic layer
4 surface layer.
Claims (5)
1. An elastic roller is provided with:
a shaft body;
an elastic layer disposed on an outer circumferential surface of the shaft body; and
the surface layer is arranged on the outer side of the elastic layer;
the surface layer is obtained by coating and curing a mixture of the following (A) component to (D) component;
(A) a binder base obtained by polymerizing a composition containing both terminal-modified silicone oil and an isocyanate compound,
(B) a blocked isocyanate compound which is a mixture of a blocked isocyanate compound,
(C) silicone rubber particles and/or acrylic particles having a particle diameter of 0.2 to 10 μm,
(D) and (4) diluting the solvent.
2. The elastic roller according to claim 1,
(A) the component (A) is a binder base material obtained by polymerizing a composition containing both-terminal-modified silicone oil, one-terminal-glycol-modified silicone oil, and an isocyanate compound.
3. The elastic roller according to claim 1,
(A) the component (B) is a binder main agent obtained by polymerizing a composition containing a both-terminal-modified silicone oil, a one-terminal-diol-modified silicone oil, an isocyanate compound, and a carbonate polyol and/or a hydrogenated butadiene polyol.
4. The elastic roller according to any one of claims 1 to 3,
(B) the component is isocyanurate type blocked isocyanate with methyl ethyl ketoxime end closed or adduct type blocked isocyanate with methyl ethyl ketoxime end closed.
5. The elastic roller according to any one of claims 1 to 4, further comprising
An adhesive layer between the elastic layer and the skin layer;
the adhesive layer contains an organotitanium compound and/or an organozirconium compound.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018217641A JP7156756B2 (en) | 2018-11-20 | 2018-11-20 | elastic roller |
| JP2018-217641 | 2018-11-20 | ||
| PCT/JP2019/044128 WO2020105491A1 (en) | 2018-11-20 | 2019-11-11 | Elastic roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112740112A true CN112740112A (en) | 2021-04-30 |
| CN112740112B CN112740112B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980060744.3A Active CN112740112B (en) | 2018-11-20 | 2019-11-11 | Elastic roller |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7156756B2 (en) |
| CN (1) | CN112740112B (en) |
| WO (1) | WO2020105491A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7422022B2 (en) | 2020-07-02 | 2024-01-25 | 信越ポリマー株式会社 | developing roller |
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| JP2012252215A (en) * | 2011-06-03 | 2012-12-20 | Bridgestone Corp | Developing roller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2110715B1 (en) * | 2008-04-15 | 2012-06-06 | Ten Cate Enbi International B.V. | Developing roller, developing apparatus comprising such a developing roller as well a method for providing such a developing roller |
| JP6617479B2 (en) * | 2014-09-29 | 2019-12-11 | 東ソー株式会社 | Mold release agent composition used for resin molding, and polyurethane resin molded product molded using this mold release agent |
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2018
- 2018-11-20 JP JP2018217641A patent/JP7156756B2/en active Active
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- 2019-11-11 WO PCT/JP2019/044128 patent/WO2020105491A1/en active Application Filing
- 2019-11-11 CN CN201980060744.3A patent/CN112740112B/en active Active
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| JPH10161394A (en) * | 1996-11-26 | 1998-06-19 | Fuji Xerox Co Ltd | Electrostatic charge imparting member for electrostatic charge image development, electrostatic charge image development and image forming method |
| JP2006274139A (en) * | 2005-03-30 | 2006-10-12 | Toyobo Co Ltd | Polyurethane resin and electrically conductive roll using the same |
| JP2007047200A (en) * | 2005-08-05 | 2007-02-22 | Kaneka Corp | Elastic roller for electrophotography |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7156756B2 (en) | 2022-10-19 |
| JP2020086039A (en) | 2020-06-04 |
| CN112740112B (en) | 2024-01-19 |
| WO2020105491A1 (en) | 2020-05-28 |
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