US4634610A
Expired / Lapsed
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Heat curable silicone polyimide compositions
Assignee: General Electric Co
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Filing: 1985-10-31
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Granted: 1987-01-06
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Expires: 2005-10-31
Abstract
Abstract Silicone polyimides can be used as a one or two package heat curable composition when cured by silicon vinyl silicon-hydride addition with a cyclometallized platinum phosphite catalyst.
Inventors
- 👤 Francis L. Keohan
- 👤 Larry N. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:03
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08K; C08K5/00; C08K5/56; C08L83/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
A heat curable composition comprising (A) imide substituted silicone block copolymer having chemically combined blocks selected from (i) polydiorganosiloxane having chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units, and (ii) a mixture of (i) and polyimide, (B) a polyfunctional organosilicon material having at least two chemically combined .tbd.SiH units or .tbd.SiC 2 H 3 units, and (C) an effective amount of a cyclometallized platinum phosphite catalyst having the formula ##STR7## where (A) and (B) are capable of undergoing a polyaddition reaction involving addition between chemically combined .tbd.SiH units of (A) with .tbd.SiC 2 H 3 units of (B), or .tbd.SiC 2 H 3 units of (A) with .tbd.SiH units of (B), (B) is selected from the class consisting of organosilanes, organopolysilanes, organosiloxanes, organopolysiloxanes, and cyclopolyorganosiloxanes, and mixtures thereof, R and R 2 are selected from C.sub.(1-14) monovalent hydrocarbon radicals and substituted C.sub.(1-14) monovalent hydrocarbon radicals, R 1 is selected from C.sub.(6-14) monovalent aromatic hydrocarbon radicals and substituted C.sub.(6-14) monovalent aromatic hydrocarbon radicals and X is a halogen radical.
Claim 2
Dependent Claim
169 words
A heat curable composition comprising (A) imide substituted silicone block copolymer having chemically combined blocks selected from (i) polydiorganosiloxane having chemically combined .tbd.SiH or .tbd.SiC 2 H 3 units, and (ii) a mixture of (i) and polyimide, (B) a polyfunctional organosilicon material having at least two chemically combined .tbd.SiH units or .tbd.SiC 2 H 3 units, and (C) an effective amount of a cyclometallized platinum phosphite catalyst having the formula ##STR7## where (A) and (B) are capable of undergoing a polyaddition reaction involving addition between chemically combined .tbd.SiH units of (A) with .tbd.SiC 2 H 3 units of (B), or .tbd.SiC 2 H 3 units of (A) with .tbd.SiH units of (B), (B) is selected from the class consisting of organosilanes, organopolysilanes, organosiloxanes, organopolysiloxanes, and cyclopolyorganosiloxanes, and mixtures thereof, R and R 2 are selected from C.sub.(1-14) monovalent hydrocarbon radicals and substituted C.sub.(1-14) monovalent hydrocarbon radicals, R 1 is selected from C.sub.(6-14) monovalent aromatic hydrocarbon radicals and substituted C.sub.(6-14) monovalent aromatic hydrocarbon radicals and X is a halogen radical.
Claim 3
Dependent Claim
18 words
A heat curable composition in accordance with claim 1, where the cyclometallized platinum phosphite catalyst is ortho metallated.
Claim 4
Dependent Claim
24 words
A heat curable composition in accordance with claim 1, where the imide substituted silicone block copolymer is a norbornane or norbornene silicone block copolymer.
Claim 5
Dependent Claim
18 words
A heat curable composition in accordance with claim 1, where the imide substituted polymer is a norbornane polydiorganosiloxane.
Claim 6
Dependent Claim
11 words
A one package heat curable composition in accordance with claim 1.
Claim 7
Dependent Claim
10 words
A heat curable silicone-elastomeric adhesive in accordance with claim 1.
Claim 8
Dependent Claim
15 words
A composition in accordance with claim 1 which is in the form of a sheet.
Claim 9
Independent Claim
107 words
A method for binding a substrate using a hot melt silicone imide adhesive which comprises, (1) melting a mixture of an imide substituted silicone block copolymer having an average of 0.1 to 10 mol percent of chemically combined silicon vinyl siloxy units based on the total moles of diorganosiloxy units, a polyfunctional organosilicon hydride and an effective amount of a platinum catalyst having the formula, ##STR8## where R and R 2 are selected from C.sub.(1-14) monovalent hydrocarbon radicals and substituted C.sub.(1-14) monovalent hydrocarbon radicals, R 1 is selected from C.sub.(6-14) monovalent aromatic hydrocarbon radicals and substituted C.sub.(6-14) monovalent aromatic hydrocarbon radicals and X is a halogen radical.
Claim 10
Independent Claim
107 words
A method for binding a substrate using a hot melt silicone imide adhesive which comprises, (1) melting a mixture of an imide substituted silicone block copolymer having an average of 0.1 to 10 mol percent of chemically combined silicon vinyl siloxy units based on the total moles of diorganosiloxy units, a polyfunctional organosilicon hydride and an effective amount of a platinum catalyst having the formula, ##STR8## where R and R 2 are selected from C.sub.(1-14) monovalent hydrocarbon radicals and substituted C.sub.(1-14) monovalent hydrocarbon radicals, R 1 is selected from C.sub.(6-14) monovalent aromatic hydrocarbon radicals and substituted C.sub.(6-14) monovalent aromatic hydrocarbon radicals and X is a halogen radical.
Claim 11
Dependent Claim
13 words
A method in accordance with claim 8 where the substrate is a metal.
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |