EP0280437A1
Expired / Lapsed
EP
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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: 1988-02-09
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Granted: —
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Expires: 2008-02-09
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 fluroine resin, and an organic peroxide in defined amounts.
Inventors
- 👤 Masaharu Takahashi
- 👤 Keiji Take
- 👤 Takeo Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 23:20
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: 11
Claim 1
Independent Claim
164 words
An elastomer roll comprising a roll core, a first layer formed on the roll core, and a second layer formed on the first layer, said second layer being of a fluorine resin and said first layer being 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 a SiO (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 a silicon atom; (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 (6) from 0.1 to 10 parts by weight of an organic peroxide as curing agent.
Claim 2
Dependent Claim
164 words
An elastomer roll comprising a roll core, a first layer formed on the roll core, and a second layer formed on the first layer, said second layer being of a fluorine resin and said first layer being 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 a SiO (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 a silicon atom; (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 (6) from 0.1 to 10 parts by weight of an organic peroxide as curing agent.
Claim 3
Dependent Claim
14 words
An elastomer roll according to Claim 1, wherein each R is an alkyl group.
Claim 4
Dependent Claim
24 words
An elastomer roll according to Claim 1 or 2, wherein said organopolysiloxane has a triorganosilyl group or a hydroxyl group at both ends thereof.
Claim 5
Dependent Claim
26 words
An elastomer roll according to Claim 1, 2 or 3 wherein said organopolysiloxane has a viscosity not less than 3 x 10⁻⁴m²/S (300 centistokes) at 25°C.
Claim 6
Dependent Claim
39 words
An elastomer roll according to any one of the preceding claims, wherein said silica filler has a specific surface area of not less than 1 m²/g and is used in an amount from 20 to 250 parts by weight.
Claim 7
Dependent Claim
31 words
An elastomer roll according to any one of the preceding claims, wherein said iron oxide is in the form of a powder having a size or not larger than 50 micrometers.
Claim 8
Dependent Claim
21 words
An elastomer roll according to any one of the preceding claims, wherein said first layer is 0.3 to 20 mm thick.
Claim 9
Dependent Claim
41 words
An elastomer roll according to any one of the preceding claims, wherein said first layer has a JIS hardness of from 40 to 75, a tensile strength of not less than 4 kgf/cm², and an elongation of from 100 to 300%.
Claim 10
Dependent Claim
41 words
An elastomer roll according to any one of the preceding claims, wherein said second layer has been 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.
Claim 11
Dependent Claim
22 words
Use of an elastomer roll as claimed in any one of the preceding claims as a fixing roll in an electrostatic duplicator.
References Cited (Backward Citations)
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