Patent US4517342A successfully refreshed from Google Patents.
US4517342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat curable compositions
Assignee: General Electric Co
•
Filing: 1984-05-11
•
Granted: 1985-05-14
•
Expires: 2004-05-11
Abstract
Abstract A heat curable composition is provided convertible to a high strength silicone elastomer. A norbornane silicone block copolymer having silicon hydride or silicon vinyl functional groups in the silicone block is used in combination with an effective amount of a platinum catalyst and a polyfunctional organosilicon material capable of undergoing a polyaddition reaction with the norbornane silicone block copolymer when thermally activated.
Inventors
- 👤 Hong-Son Ryang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/42; C08G77/452; C08G77/455; C08L79/00; C08L79/04; C08L79/08; C08L83/10; C08G77/04; C08G77/12; C08G77/20; C08G77/70
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A heat curable composition comprising (A) a norbornane silicone block copolymer having chemically combined blocks selected from (i) polyorganosiloxane having chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units, and (ii) and mixture of (i) and polyimide, (B) a polyfunctional organosilicon material capable of undergoing a polyaddition reaction with (A) involving addition between chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units, which polyfunctional organosilicon material has at least two chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units and is selected from organosilanes, organopolysilanes, organosiloxanes, organopolysiloxanes and cyclopolyorganosiloxanes, and (C) an effective amount of a platinum catalyst.
Claim 2
Dependent Claim
98 words
A heat curable composition comprising (A) a norbornane silicone block copolymer having chemically combined blocks selected from (i) polyorganosiloxane having chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units, and (ii) and mixture of (i) and polyimide, (B) a polyfunctional organosilicon material capable of undergoing a polyaddition reaction with (A) involving addition between chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units, which polyfunctional organosilicon material has at least two chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units and is selected from organosilanes, organopolysilanes, organosiloxanes, organopolysiloxanes and cyclopolyorganosiloxanes, and (C) an effective amount of a platinum catalyst.
Claim 3
Dependent Claim
20 words
A heat curable composition comprising a norbornene terminated polyimide, a silicon hydride and an effective amount of a platinum catalyst.
Claim 4
Dependent Claim
20 words
A heat curable composition comprising a norbornene terminated polyimide, a silicon hydride and an effective amount of a platinum catalyst.
Claim 5
Dependent Claim
19 words
A heat curable composition in accordance with claim 2, where the norbornene terminated polyimide is a norbornene terminated polyetherimide.
Claim 6
Dependent Claim
18 words
A heat curable composition in accordance with claim 2, where the silicon hydride is a silicon hydride siloxane.
Claim 7
Dependent Claim
28 words
A heat curable composition in accordance with claim 1 comprising a vinyl terminated poly(norbornane imide siloxane), a silicon hydride siloxane and an effective amount of a platinum catalyst.
Claim 8
Dependent Claim
23 words
A heat curable composition comprising a norbornane terminated polyimide chain-stopped with silicon hydride, a poly(vinyldiorganosiloxane) and an effective amount of a platinum catalyst.
Claim 9
Dependent Claim
23 words
A heat curable composition comprising a norbornane terminated polyimide chain-stopped with silicon hydride, a poly(vinyldiorganosiloxane) and an effective amount of a platinum catalyst.
Claim 10
Dependent Claim
27 words
A heat curable composition in accordance with claim 6, where the norbornane terminated polyimide chain-stopped with silicon hydride is a norbornane terminated polyetherimide chain-stopped with silicon hydride.
Claim 11
Dependent Claim
17 words
A heat curable composition in accordance with claim 6, where the poly(vinyldiorganosiloxane) is a vinyl chain-stopped polydiorganosiloxane.
Claim 12
Dependent Claim
17 words
A heat curable composition in accordance with claim 5, where the poly(vinyldiorganosiloxane) is a vinyl containing cyclodiorganosiloxane.
Claim 13
Dependent Claim
85 words
A heat curable silicone polyimide copolymer composition comprising by weight, (A) 100 parts of a silicon hydride terminated polyimide resulting from the reaction of an organic diamine with a norbornene anhydride or norbornene dicarboxylic acid monoalkylester, or a mixture thereof with an aromatic organic dianhydride, (B) 1 to 200 parts of a poly(vinyldiorganosiloxane) having a viscosity of from about 10 to 200,000 centipoise at 25° C., consisting essentially of diorganosiloxy units chemically combined with vinylorganosiloxy units and (C) an effective amount of a platinum catalyst.
Claim 14
Dependent Claim
85 words
A heat curable silicone polyimide copolymer composition comprising by weight, (A) 100 parts of a silicon hydride terminated polyimide resulting from the reaction of an organic diamine with a norbornene anhydride or norbornene dicarboxylic acid monoalkylester, or a mixture thereof with an aromatic organic dianhydride, (B) 1 to 200 parts of a poly(vinyldiorganosiloxane) having a viscosity of from about 10 to 200,000 centipoise at 25° C., consisting essentially of diorganosiloxy units chemically combined with vinylorganosiloxy units and (C) an effective amount of a platinum catalyst.
Claim 15
Dependent Claim
12 words
A composition in accordance with claim 10, where the polyvinylorganosiloxane is 1,3,5-trivinyl-1,1,3,5,5-pentamethyltrisiloxane.
Claim 16
Dependent Claim
15 words
A composition in accordance with claim 10, where the polyvinylorganosiloxane is a vinyl terminated polydimethylsiloxane.
Claim 17
Dependent Claim
40 words
A heat curable silicone polyimide copolymer composition comprising by weight, (A) 100 parts of a vinyl terminated silicone norbornane polyimide copolymer, (B) 1 to 200 parts of a silicon hydride siloxane, and (C) an effective amount of a platinum catalyst.
Claim 18
Dependent Claim
40 words
A heat curable silicone polyimide copolymer composition comprising by weight, (A) 100 parts of a vinyl terminated silicone norbornane polyimide copolymer, (B) 1 to 200 parts of a silicon hydride siloxane, and (C) an effective amount of a platinum catalyst.
References Cited (Backward Citations)
US3133891A
Cited
US3065194A
Cited
US3159601A
Cited
US3159662A
Cited
US3220972A
Cited
US3458469A
Cited
US3385822A
Cited
US3516951A
Cited
US3451965A
Cited
US3595832A
Cited
US3775442A
Cited
US4088670A
Cited
US4213914A
Cited
US4275184A
Cited
US4208312A
Cited
US4329274A
Cited
US4404350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |