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US4769412A
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Room temperature-curable silicone rubber composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1986-11-12
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Granted: 1988-09-06
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Expires: 2006-11-12
Abstract
Abstract A room temperature-curable silicone rubber composition having improved heat-resistance is disclosed. The composition is formulated without any siliceous fillers as a reinforcing inorganic filler conventionally used in silicone compositions and, instead, comprises carbon black as a reinforcing filler. Namely, the composition comrises a major amount of a hydroxy-containing organopolysiloxane admixed with a minor amount of an organosilicon compound having at least two hydrolyzable groups per molecule, a curing catalyst, carbon black and iron oxide.
Inventors
- 👤 Yoshio Inoue
- 👤 Masatoshi Arai
- 👤 Kazuyuki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:43
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/54; C08L; C08L83/00; C08L83/04; C08L83/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A room temperature-curable silicone rubber composition which comprises: (A) 100 parts by weight of an organopolysiloxane containing hydroxy groups in a molecule; (B) from 0.5 to 25 parts by weight of an organosilicon compound having at least two hydrolyzable groups per molecule; (C) from 0.01 to 5 parts by weight of a curing catalyst; (D) from 5 to 30 parts by weight of carbon black; and (E) from 0.1 to 10 parts by weight of iron oxide.
Claim 2
Dependent Claim
77 words
A room temperature-curable silicone rubber composition which comprises: (A) 100 parts by weight of an organopolysiloxane containing hydroxy groups in a molecule; (B) from 0.5 to 25 parts by weight of an organosilicon compound having at least two hydrolyzable groups per molecule; (C) from 0.01 to 5 parts by weight of a curing catalyst; (D) from 5 to 30 parts by weight of carbon black; and (E) from 0.1 to 10 parts by weight of iron oxide.
Claim 3
Dependent Claim
23 words
The room temperature-curable silicone rubber composition as claimed in claim 1 in which the organopolysiloxane as the component (A) is an α,ω-dihydroxy diorganopolysiloxane.
Claim 4
Dependent Claim
59 words
The room temperature-curable silicone rubber composition as claimed in claim 1 in which the organosilicon compound as the component (B) is a compound represented by the general formula R 1 SiX 3 in which R 1 is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 8 carbon atoms in a molecule and X is a hydrolyzable group.
Claim 5
Dependent Claim
78 words
The room temperature-curable silicone rubber composition as claimed in claim 1 in which the organosilicon compound as the component (B) is an alkenyloxysilane represented by the general formula R.sup.2.sub.4-n Si(O--CR.sup.3 ═CHR.sup.4).sub.n, in which R 2 is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 8 carbon atoms, R 3 and R 4 are each a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group and n is 3 or 4, or a partial hydrolyzate thereof.
Claim 6
Dependent Claim
70 words
The room temperature-curable silicone rubber composition as claimed in claim 1, in which the curing catalyst as the component (C) is a silane compound or an organopolysiloxane compound having at least one of the guanidino groups represented by the formula --N═C[N(R.sup.5)(R.sup.6)][N(R.sup.7)(R.sup.8)], in which R 5 , R 6 , R 7 and R 8 are each a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group, in a molecule.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |