US4477641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable silicone composition
Assignee: Momentive Performance Materials Japan LLC
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Filing: 1984-01-30
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Granted: 1984-10-16
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Expires: 2004-01-30
Abstract
Abstract A curable silicone composition comprising: (A) an organopolysiloxane having in the molecule at least two alkenyl groups and at least two alkoxy groups; (B) an organopolysiloxane having in the molecule at least two hydrogen atoms bonded directly to silicon atoms, and (C) a catalyst based on platinum, palladium or rhodium for the addition reaction.
Inventors
- 👤 Yasuji Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:54
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/14; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/18; C08G77/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A curable silicone composition comprising (A) an organopolysiloxane having in the molecule at least two alkenyl groups and at least two alkoxy groups, (B) an organopolysiloxane having in the molecule at least two hydrogen atoms bonded directly to silicon atoms and (C) a catalyst based on platinum, palladium or rhodium for the addition reaction.
Claim 2
Dependent Claim
54 words
A curable silicone composition comprising (A) an organopolysiloxane having in the molecule at least two alkenyl groups and at least two alkoxy groups, (B) an organopolysiloxane having in the molecule at least two hydrogen atoms bonded directly to silicon atoms and (C) a catalyst based on platinum, palladium or rhodium for the addition reaction.
Claim 3
Dependent Claim
18 words
A curable silicone composition as set forth in claim 1, wherein organopolysiloxane component (A) is a linear organopolysiloxane.
Claim 4
Dependent Claim
37 words
A curable silicone composition as set forth in claim 2 wherein organopolysiloxane component (A) is a linear organopolysiloxane obtained by partial dealcoholation reaction between an organopolysiloxane having hydroxyl groups on both ends and an alkenyl group-containing alkoxysilane.
Claim 5
Dependent Claim
28 words
A curable silicone composition as set forth in claim 1, 2 or 3 wherein organopolysiloxane component (A) has a viscosity of 20 to 200,000 cP at 25° C.
Claim 6
Dependent Claim
25 words
A curable silicone composition as set forth in claim 1 whereein organopolysiloxane component (B) has a viscosity of 1 to 1,000 cP at 25° C.
Claim 7
Dependent Claim
52 words
A curable silicone composition as set forth in claim 1, 2 or 3 wherein organopolysiloxane component (B) is present in an amount such that the number of hydrogen atoms bonded directly to silicon atoms in component (B) is from 0.5 to 10 equivalents based on the alkenyl groups contained in component (A).
Claim 8
Dependent Claim
51 words
A curable silicone composition as set forth in claim 1 wherein the addition reaction catalyst component (C) is from the group consisting of chloroplatinic acid, alcohol-modified chloroplatinic acid, a platinum-olefin complex, a platinum-ketone complex, a platinum-vinylsiloxane complex, platinum supported on alumina, platinum supported on silica and platinum black and mixtures thereof.
Claim 9
Dependent Claim
34 words
A curable silicone composition as set forth in claim 1 wherein the addition reaction catalyst component (C) is selected from the group consisting of tetrakis(triphenylphosphine) palladium and a mixture of palladium black and triphenylphosphine.
Claim 10
Dependent Claim
23 words
A curable silicone composition as set forth in claim 1 wherein the addition reaction catalyst component (C) is a catalyst based on rhodium.
Claim 11
Dependent Claim
51 words
A curable silicone composition as set forth in claim 1 wherein the amount of addition reaction catalyst component (C) is such that the amount of the platinum, palladium or rhodium element is present at a concentration of 0.1 to 1,000 ppm based on the sum of the components (A) and (B).
Claim 12
Dependent Claim
51 words
A curable silicone composition as set forth in claim 1 wherein the amount of addition reaction catalyst component (C) is such that the amount of the platinum, palladium or rhodium element is present at a concentration of 0.3 to 200 ppm based on the sum of the components (A) and (B).
References Cited (Backward Citations)
US4273902A
Cited
US4311821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |