US4810564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomer roll having a first layer of an organopolysiloxane composition and a second thin layer of a fluorine resin
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1988-02-08
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Granted: 1989-03-07
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Expires: 2008-02-08
Abstract
Abstract An elastomer roll comprising a roll core, a first layer of a cured organopolysiloxane composition, and a second thin layer of a fluorine resin formed in this order. The organopolysiloxane composition is comprised of an organopolysiloxane, a finely divided silica filler, an organosilicon material having at least one hydrogen atom bonded to the silicon atom in one molecule, iron oxide, a fluorine resin, and an organic peroxide in defined amounts.
Inventors
- 👤 Masaharu Takahashi
- 👤 Keiji Take
- 👤 Takeo Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:15
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; C08G77/14; C08G77/16; C08G77/20; C08G77/22; C08G77/24; C08G77/60; C08G77/70; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
An elastomer roll comprises a roll core, a first layer formed on the roll core, and a second thin layer of a fluorine resin formed on the first layer, said first layer comprised of a cured product of an organopolysiloxane composition which comprises: (1) 100 parts by weight of an organopolysiloxane having the following general average unit formula R.sub.a SiO.sub.(4-a)/2 in which each R is an unsubstituted or substituted hydrocarbon group, and a is a positive value of from 1.90 to 2.05; (2) from 5 to 300 parts by weight of a finely divided silica filler; (3) from 0.05 to 10 parts by weight of an organosilicon compound having at least one hydrogen atom bonded to the silicon atom in one molecule; (4) from 5 to 100 parts by weight of iron oxide; (5) from 0.5 to 100 parts by weight of a fluorine resin; and from 0.1 to 10 parts by weight of an organic peroxide for curing the composition.
Claim 2
Dependent Claim
161 words
An elastomer roll comprises a roll core, a first layer formed on the roll core, and a second thin layer of a fluorine resin formed on the first layer, said first layer comprised of a cured product of an organopolysiloxane composition which comprises: (1) 100 parts by weight of an organopolysiloxane having the following general average unit formula R.sub.a SiO.sub.(4-a)/2 in which each R is an unsubstituted or substituted hydrocarbon group, and a is a positive value of from 1.90 to 2.05; (2) from 5 to 300 parts by weight of a finely divided silica filler; (3) from 0.05 to 10 parts by weight of an organosilicon compound having at least one hydrogen atom bonded to the silicon atom in one molecule; (4) from 5 to 100 parts by weight of iron oxide; (5) from 0.5 to 100 parts by weight of a fluorine resin; and from 0.1 to 10 parts by weight of an organic peroxide for curing the composition.
Claim 3
Dependent Claim
14 words
An elastomer roll according to claim 1, wherein each R is an alkyl group.
Claim 4
Dependent Claim
22 words
An elastomer roll according to claim 1, wherein said organopolysiloxane has a trioganosilyl group or a hydroxyl group at both ends thereof.
Claim 5
Dependent Claim
21 words
An elastomer roll according to claim 1, wherein said organopolysiloxane has a viscosity not less than 300 centistokes at 25° C.
Claim 6
Dependent Claim
37 words
An elastomer roll according to claim 1, wherein said silica filler has a specific surface area of not less than 1 m.sup. 2/g and is used in an amount of from 20 to 250 parts by weight.
Claim 7
Dependent Claim
27 words
An elastomer roll according to claim 1, wherein said iron oxide is in the form of a powder having a size of not larger than 50 micrometers.
Claim 8
Dependent Claim
26 words
An elastomer roll according to claim 1, wherein said cured product is wound about the roll substrate in a thickness of from 0.3 to 20 mm.
Claim 9
Dependent Claim
38 words
An elastomer roll according to claim 1, wherein said first layer has a JIS hardness of from 40 to 75, a tensile strength of not less than 4 kgf/cm.sup. 2, and an elongation of from 100 to 300%.
Claim 10
Dependent Claim
37 words
An elastomer roll according to claim 1, wherein said second layer is formed by application of a powder, paste or dispersion of a fluorine resin and thermal treatment at a temperature of from 300 to 400° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |