US4654408A
Expired / Lapsed
US
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Curable silicone composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1986-03-14
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Granted: 1987-03-31
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Expires: 2006-03-14
Abstract
Abstract A curable silicone composition comprising (A) an organosilicon compound having at least two radicals of the formula: ViSi(R 1 ) 2 Si(R 1 ) 2 --Z-- wherein R 1 is a lower alkyl radical and Z is a bivalent radical of --O-- or --CH 2 ) n in which n is an integer of 1 to 3, (B) a platinum catalyst, and optionally (C) an organosilicon compound having silicon bonded vinyl groups. The composition is cured through a new crosslinking mechanism without any byproducts, and has high stability at normal temperatures and good curability.
Inventors
- 👤 Hiroshige Okinoshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:01
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A curable silicone composition comprising: (A) an organosilicon compound represented by the formula (I): ##STR8## wherein Vi represents vinyl radical, R 1 , which may be the same or different, is a lower alkyl radical, R 2 is a substituted or unsubstituted univalent hydrocarbon radical, Z is a bivalent radical represented by --O-- or --CH 2 -- n wherein n is an integer of from 1 to 3, and a and b are numbers such that 0<a≦4, 0≦b<4 and 0<a+b≦4, and having at least two radicals of the formula: ViSi(R 1 ) 2 Si(R 1 ) 2 --z-- in it molecule, and (B) a platinum catalyst.
Claim 2
Dependent Claim
106 words
A curable silicone composition comprising: (A) an organosilicon compound represented by the formula (I): ##STR8## wherein Vi represents vinyl radical, R 1 , which may be the same or different, is a lower alkyl radical, R 2 is a substituted or unsubstituted univalent hydrocarbon radical, Z is a bivalent radical represented by --O-- or --CH 2 -- n wherein n is an integer of from 1 to 3, and a and b are numbers such that 0<a≦4, 0≦b<4 and 0<a+b≦4, and having at least two radicals of the formula: ViSi(R 1 ) 2 Si(R 1 ) 2 --z-- in it molecule, and (B) a platinum catalyst.
Claim 3
Dependent Claim
83 words
A composition according to claim 1, wherein said organosilicon compound of component (A) is: ViMe 2 SiMe 2 SiO(SiMe 2 O) n SiMe 2 SiMe 2 Vi, ViMe 2 SiMe 2 SiCH 2 CH 2 SiMe 2 O(SiMe 2 O) n -SiMe 2 CH 2 CH 2 SiMe 2 Vi, or [(ViMe 2 SiMe 2 SiCH 2 CH 2 SiMe 2 O) 2 RSi] 2 O wherein n is an integer of not less than 0, and R represents a lower alkyl group.
Claim 4
Dependent Claim
30 words
A composition according to claim 1 or 2, wherein the content of said platinum catalyst of component (B) is from 1 to 100 ppm, as platinum, in the whole composition.
Claim 5
Dependent Claim
90 words
A composition according to claim 1, which further comprises: (C) an organosilicon compound represented by the formula (II): ##STR9## wherein Vi represents vinyl radical, R 3 is a substituted or unsubstituted univalent hydrocarbon radical, and c and d are numbers such that 0<c≦4, 0≦d<4 and 0<c+d≦4, and, where c+d has a value of less than 4, having at least two silicon atoms to each of which at least two vinyl radicals are bonded, or, where c+d has a value of 4, having at least three vinyl radicals in its molecule.
Claim 6
Dependent Claim
25 words
A composition according to claim 4, wherein said organosilicon compound of component (C) is: ##STR10## wherein n is an integer of not less than 0.
Claim 7
Dependent Claim
36 words
A composition according to claim 4, wherein the amount of said organosilicon compound of component (C) is not more than 10,000 parts by weight per 100 parts by weight of said organosilicon compound of component (A).
Claim 8
Dependent Claim
36 words
A composition according to claim 6, wherein the amount of said organosilicon compound of component (C) is from 100 to 1,000 parts by weight per 100 parts by weight of said organosilicon compound of component (A).
Claim 9
Dependent Claim
32 words
A composition according to claim 4, 5, 6 or 7, wherein the content of said platinum catalyst of component (B) is from 1 to 100 ppm, as platinum, in the whole composition.
Claim 10
Dependent Claim
28 words
A composition according to claim 1 or 4 which further comprises at least one selected from the group consisting of inorganic fillers, pigments, dyes, antioxidants and reaction inhibitors.
References Cited (Backward Citations)
US4216252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |