US4599394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alkoxy-terminated polysiloxanes
Assignee: General Electric Co
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Filing: 1985-08-28
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Granted: 1986-07-08
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Expires: 2005-08-28
Abstract
Abstract The present invention relates to a alkoxy-functional one-component RTV composition. In particular, there is disclosed processes for producing an alkoxy-terminated diorganopolysiloxane by reacting a vinyl or silanol containing siloxane with an alkoxy-functional hydride containing silane in the presence of a platinum catalyst.
Inventors
- 👤 Gary M. Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:08
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/18; C08G77/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A process for producing alkoxy-terminated polysiloxanes which can be used to produce RTV silicone rubber compositions, comprising anhydrously reacting (1) a vinyl-terminated diorganopolysiloxane having a viscosity in the range of 100 to 1,000,000 centipoise at 25° C., where the organo groups are C 1-13 monovalent substituted or unsubstituted hydrocarbon radicals with (2) a polyalkoxy crosslinking agent of the formula ##STR16## where R 1 is a C 1-8 monovalent hydrocarbon radical, R 2 is a C 1-13 monovalent hydrocarbon radical, and b is 0, 1 or 2; in the presence of (3) a platinum or platinum-containing catalyst.
Claim 2
Dependent Claim
96 words
A process for producing alkoxy-terminated polysiloxanes which can be used to produce RTV silicone rubber compositions, comprising anhydrously reacting (1) a vinyl-terminated diorganopolysiloxane having a viscosity in the range of 100 to 1,000,000 centipoise at 25° C., where the organo groups are C 1-13 monovalent substituted or unsubstituted hydrocarbon radicals with (2) a polyalkoxy crosslinking agent of the formula ##STR16## where R 1 is a C 1-8 monovalent hydrocarbon radical, R 2 is a C 1-13 monovalent hydrocarbon radical, and b is 0, 1 or 2; in the presence of (3) a platinum or platinum-containing catalyst.
Claim 3
Dependent Claim
43 words
The process of claim 1, wherein the vinyl-terminated diorganopolysiloxane has the formula ##STR17## where Vi is vinyl, each R is an independently selected C 1-13 monovalent hydrocarbon radical, and t is a whole number having a value of from 50 to about 2500.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein the reaction is carried out at atmospheric pressure.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein there is present an excess of at least 100% of polyalkoxy crosslinking agent.
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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |