US4764577A
Expired / Lapsed
US
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Curable polymeric composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1987-07-29
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Granted: 1988-08-16
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Expires: 2007-07-29
Abstract
Abstract The curable polymeric composition comprises: (A) an organic polymer having at least two alkenyloxysilyl groups; (B) an organosilicon compound having at least two hydrosilyl groups; and (C) a catalytic amount of a platinum compound. When heated, the composition is curable by the hydrosilation reaction between the alkenyloxy groups in the component (A) and the silicon-bonded hydrogen atoms in the component (B) as promoted by the platinum compound to give a rubbery elastomer.
Inventors
- 👤 Yoshio Inoue
- 👤 Masatoshi Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:28
CPC Classifications
C; C08; C08L; C08L101/00; C08L101/02; C08L101/10; C08K; C08K5/00; C08K5/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A curable polymeric composition which comprises: (A) an organic polymer having at least two alkenyloxysilyl groups; (B) an organosilicon compound having at least two hydrosilyl groups; and (C) a catalytic amount of a platinum compound, wherein (B) is present in a curable amount of up to 5 times by weight of component (A).
Claim 2
Dependent Claim
53 words
A curable polymeric composition which comprises: (A) an organic polymer having at least two alkenyloxysilyl groups; (B) an organosilicon compound having at least two hydrosilyl groups; and (C) a catalytic amount of a platinum compound, wherein (B) is present in a curable amount of up to 5 times by weight of component (A).
Claim 3
Dependent Claim
31 words
The curable polymeric composition as claimed in claim 1 wherein the amount of component (C) is from 0.1 to 1000 ppm by weight based on the amount of the component (A).
Claim 4
Dependent Claim
60 words
The curable polymeric composition as claimed in claim 1 wherein the alkenyloxysilyl group of component (A) is represented by the general formula --SiR.sup.1.sub.3-n (O--CR.sup.3 ═CH--R.sup.2).sub.n, in which R 1 is a monovalent hydrocarbon group, R 2 and R 3 are each a hydrogen atom or a monovalent hydrocarbon group and n is a positive integer of 1, 2 or 3.
Claim 5
Dependent Claim
16 words
The curable polymeric composition as claimed in claim 1 wherein the organic polymer is a poly(diorganosiloxane).
Claim 6
Dependent Claim
16 words
The curable polymeric composition as claimed in claim 1 wherein the organic polymer is a polyether.
Claim 7
Dependent Claim
58 words
The curable polymeric composition as claimed in claim 1 wherein component (B) is selected from the group consisting of: 1,1,3,3-tetramethyl disiloxane; trimethylsilyl-terminated methyl hydrogen polysiloxane of the formula Me.sub.3 Si--O--(--SiHMe--O--).sub.30 --SiMe.sub.3 ; trimethylsilyl-terminated poly(methylhydrogen siloxane-dimethyl siloxane) of the formula Me.sub.3 Si--O--(--SiHMe--O--).sub.10 --(--SiMe.sub.2 --O--).sub.10 --SiMe.sub.3 ; 1,3,5,7-tetramethyl cyclotetrasiloxane; and 1,3,5,7-tetramethyl 1,3,-dipropyl cyclotetrasiloxane, in which Me is a methyl group.
Claim 8
Dependent Claim
31 words
The curable polymeric composition as claimed in claim 1 wherein the amount of component (B) is from 1.0 to 100 parts by weight per 100 parts by weight of component (A).
Claim 9
Dependent Claim
37 words
The curable polymeric composition as claimed in claim 1 wherein component (C) is selected from the group consisting of chloroplatinic acid, alcoholic solutions of chloroplatinic acid and complexes of chloroplatinic acid with an olefin or vinyl siloxane.
Claim 10
Dependent Claim
15 words
A cured rubbery elastomer obtained by heating a curable polymeric composition according to claim 1.
References Cited (Backward Citations)
US4617238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |