US5455313A
Expired / Lapsed
US
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Silicone rubber composition for fixing roll service
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1994-06-15
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Granted: 1995-10-03
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Expires: 2014-06-15
Abstract
Abstract The present invention relates to a silicone rubber composition for fixing roll service. More specifically, the invention relates to a silicone rubber composition for fixing roll service that is easily molded into a fixing roll as used in devices such as electrophotographic copiers, facsimile machines, and laser printers and that yields a fixing roll with an excellent mechanical strength and excellent toner release properties.
Inventors
- 👤 Hidetoshi Kurusu
- 👤 Akito Nakamura
- 👤 Yoshito Ushio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:15
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20; C08G77/70; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2048; G03G2215/2051; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1386; Y10T428/139
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
159 words
An inorganic filler-free silicone rubber composition for fixing roll service comprising: (A) 100 weight parts diorganopolysiloxane mixture consisting essentially of (a) 10 to 90 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of 100 to 100,000 centipoise and (b) 90 to 10 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of at least 1,000,000 centipoise, (B) 5 to 100 weight parts organopolysiloxane resin with the general formula (R.sub.3 SiO.sub.1/2).sub.x (SiO.sub.4/2).sub.1.0 in which R denotes a monovalent hydrocarbon group and x has a value of 0.6 to 4.0, (C) organopolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule, in a quantity that yields 0.6 to 20 moles silicon-bonded hydrogen in component (C) per 1 mole total alkenyl group in components (A) and (B), and (D) platinum catalyst in a catalytic quantity.
Claim 2
Dependent Claim
159 words
An inorganic filler-free silicone rubber composition for fixing roll service comprising: (A) 100 weight parts diorganopolysiloxane mixture consisting essentially of (a) 10 to 90 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of 100 to 100,000 centipoise and (b) 90 to 10 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of at least 1,000,000 centipoise, (B) 5 to 100 weight parts organopolysiloxane resin with the general formula (R.sub.3 SiO.sub.1/2).sub.x (SiO.sub.4/2).sub.1.0 in which R denotes a monovalent hydrocarbon group and x has a value of 0.6 to 4.0, (C) organopolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule, in a quantity that yields 0.6 to 20 moles silicon-bonded hydrogen in component (C) per 1 mole total alkenyl group in components (A) and (B), and (D) platinum catalyst in a catalytic quantity.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, where the alkenyl groups of component (A)(a) are vinyl.
Claim 4
Dependent Claim
23 words
A composition according to claim 1, where the non-alkenyl groups of component (A)(a) are selected from a group consisting of methyl and phenyl.
Claim 5
Dependent Claim
15 words
A composition according to claim 1, where the alkenyl groups of component (A)(b) are vinyl.
Claim 6
Dependent Claim
23 words
A composition according to claim 1, where the non-alkenyl groups of component (A)(b) are selected from a group consisting of methyl and phenyl.
Claim 7
Dependent Claim
19 words
A composition according to claim 1, where at least one of the R groups of component (B) is alkenyl.
Claim 8
Dependent Claim
24 words
A composition according to claim 1, where viscosity of component (C) is within a range of 10 centipoise to 5,000 centipoise at 25° C.
Claim 9
Dependent Claim
23 words
A composition according to claim 1, where component (C) is selected from a group consisting of straight-chain and partially branched straight-chain molecular structures.
Claim 10
Dependent Claim
15 words
A composition according to claim 1, where the platinum catalyst is a chloroplatinic acid/1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex.
Claim 11
Dependent Claim
32 words
A composition according to claim 9, where one to 50 weight parts of platinum metal is present for each one million weight parts of the total of component (A) and component (B)
Claim 12
Dependent Claim
32 words
A composition according to claim 1, where 0.1 to 500 weight parts of platinum metal is present for each one million weight parts of the total of component (A) and component (B).
Claim 13
Dependent Claim
86 words
A composition according to claim 1, where the alkenyl groups of component (A)(a) are vinyl, the non-alkenyl groups of component (A)(a) are selected from a group consisting of methyl and phenyl, the alkenyl groups of component (A)(b) are vinyl, the non-alkenyl groups of component (A)(b) are selected from a group consisting of methyl and phenyl, at least one of the R groups of component (B) is alkenyl, and the viscosity of component (C) is within a range of 10 centipoise to 5,000 centipoise at 25° C.
Claim 14
Dependent Claim
7 words
A cured composition according to claim 1.
Claim 15
Dependent Claim
165 words
A fixing roll service comprising: a core coated with a composition comprising (A) 100 weight parts diorganopolysiloxane mixture consisting essentially of (a) 10 to 90 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of 100 to 100,000 centipoise and (b) 90 to 10 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of at least 1,000,000 centipoise, (B) 5 to 100 weight parts organopolysiloxane resin with the general formula (R.sub.3 SiO.sub.1/2).sub.x (SiO.sub.4/2).sub.1.0 in which R denotes a monovalent hydrocarbon group and x has a value of 0.6 to 4.0, (C) organopolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule, in a quantity that yields 0.6 to 20 moles silicon-bonded hydrogen in component (C) per 1 mole total alkenyl group in components (A) and (B), and (D) platinum catalyst in a catalytic quantity; where the composition is cured.
Claim 16
Dependent Claim
165 words
A fixing roll service comprising: a core coated with a composition comprising (A) 100 weight parts diorganopolysiloxane mixture consisting essentially of (a) 10 to 90 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of 100 to 100,000 centipoise and (b) 90 to 10 weight % diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule and that has a viscosity at 25° C. of at least 1,000,000 centipoise, (B) 5 to 100 weight parts organopolysiloxane resin with the general formula (R.sub.3 SiO.sub.1/2).sub.x (SiO.sub.4/2).sub.1.0 in which R denotes a monovalent hydrocarbon group and x has a value of 0.6 to 4.0, (C) organopolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule, in a quantity that yields 0.6 to 20 moles silicon-bonded hydrogen in component (C) per 1 mole total alkenyl group in components (A) and (B), and (D) platinum catalyst in a catalytic quantity; where the composition is cured.
Claim 17
Dependent Claim
88 words
A fixing roll service according to claim 14, where the alkenyl groups of component (A)(a) are vinyl, the non-alkenyl groups of component (A)(a) are selected from a group consisting of methyl and phenyl, the alkenyl groups of component (A)(b) are vinyl, the non-alkenyl groups of component (A)(b) are selected from a group consisting of methyl and phenyl, at least one of the R groups of component (B) is alkenyl, and the viscosity of component (C) is within a range of 10 centipoise to 5,000 centipoise at 25° C.
Claim 18
Dependent Claim
17 words
A fixing roll service according to claim 15 where the platinum catalyst is a chloroplatinic acid/1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex.
References Cited (Backward Citations)
JPS57149354A
Cited
US4830893A
Cited
US5034061A
Cited
JPH04164741A
Cited
US5366809A
Cited
US5362781A
Cited
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| 3.5 Years (Year 4) | 1998-10-02 | 1999-04-03 | 1999-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-02 | 2003-04-03 | 2003-10-03 | $3760.00 | Window Closed / Lapsed |
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