EP0392262A2
Expired / Lapsed
EP
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Silicone rubber composition
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1990-03-28
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Granted: —
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Expires: 2010-03-28
Abstract
Abstract A silicone rubber composition having, when cured, a stable volume resistivity values and a narrow dispersion or scatter of the values comprises an alkenyl containing polydiorganosiloxane, a surfactant-treated inorganic filler, carbon black, and curing agent. A preferred surfactant-treated inorganic filler is microparticulate silica treated with cationic surfactant.
Inventors
- 👤 Kazuo Higuchi
- 👤 Akito Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 20:51
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
95 words
Silicone rubber composition comprising (a) 100 weight parts organopolysiloxane having in each molecule at least 2 units as represented by the following general formula: R a R′ b SiO (4-a-b)/2 wherein R is a monovalent hydrocarbon group which lacks aliphatically unsaturated bonds, R′ is an alkenyl group, a is zero to 2, b is 1 to 2, and a + b is 1 to 3, (b) 5 to 200 weight parts surfactant-treated inorganic filler, (c) 5 to 50 weight parts carbon black, and (d) curing agent in a quantity sufficient to cure the instant composition.
Claim 2
Dependent Claim
95 words
Silicone rubber composition comprising (a) 100 weight parts organopolysiloxane having in each molecule at least 2 units as represented by the following general formula: R a R′ b SiO (4-a-b)/2 wherein R is a monovalent hydrocarbon group which lacks aliphatically unsaturated bonds, R′ is an alkenyl group, a is zero to 2, b is 1 to 2, and a + b is 1 to 3, (b) 5 to 200 weight parts surfactant-treated inorganic filler, (c) 5 to 50 weight parts carbon black, and (d) curing agent in a quantity sufficient to cure the instant composition.
Claim 3
Dependent Claim
19 words
Silicone rubber composition of Claim 1 in which the surfactant-treated inorganic filler comprises microparticulate silica treated with cationic surfactant.
Claim 4
Dependent Claim
29 words
Silicone rubber composition of Claim 2 in which the microparticulate silica is wet-method silica having a surface area of greater than 50 m²/g which is treated with alkylammonium salt.
Claim 5
Dependent Claim
23 words
Silicone rubber composition of Claim 3 in which the carbon black is selected from the group consisting of furnace black and acetylene black.
References Cited (Backward Citations)
No citation records indexed.
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