US5126420A
Expired / Lapsed
US
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Rtv organopolysiloxane compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1990-08-03
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Granted: 1992-06-30
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Expires: 2010-08-03
Abstract
Abstract A mixture of (A) a diorganopolysiloxane end-blocked with a hydroxyl group, (B) an α,β-substituted vinyloxysilane, or a hydrolyzate thereof, and (C) a perfluorocarboxylic acid derivative provides an RTV organopolysiloxane composition which is stable and non-corrosive to metal.
Inventors
- 👤 Shinichi Satoh
- 👤 Toshio Takago
- 👤 Hitoshi Kinami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5425; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
A room temperature vulcanizable organopolysiloxane composition comprising (A) a diorganopolysiloxane blocked with a hydroxyl group at each end of its molecular chain, (B) an α,β-substituted vinyloxysilane of general formula (I) or (II): ##STR38## wherein R 1 is a substituted or unsubstituted monovalent hydrocarbon group, R 2 and R 3 are independently selected from the class consisting of a hydrogen atom and a substituted or unsubstituted monovalent hydrocarbon group, R 4 is a substituted or unsubstituted divalent hydrocarbon group, and letter n is equal to 3 or 4, or a hydrolyzate thereof, and (C) a perfluorocarboxylic acid derivative of the general formula (III): ##STR39## wherein R 5 and R 6 are independently selected from substituted or unsubstituted monovalent hydrocarbon groups, R 7 is a substituted or unsubstituted divalent hydrocarbon group, Rf is a divalent perfluoroalkyl or perfluoroalkylether group, X is a hydrogen atom or triorganosilyl group, and letter m is equal to 2 or 3.
Claim 2
Dependent Claim
154 words
A room temperature vulcanizable organopolysiloxane composition comprising (A) a diorganopolysiloxane blocked with a hydroxyl group at each end of its molecular chain, (B) an α,β-substituted vinyloxysilane of general formula (I) or (II): ##STR38## wherein R 1 is a substituted or unsubstituted monovalent hydrocarbon group, R 2 and R 3 are independently selected from the class consisting of a hydrogen atom and a substituted or unsubstituted monovalent hydrocarbon group, R 4 is a substituted or unsubstituted divalent hydrocarbon group, and letter n is equal to 3 or 4, or a hydrolyzate thereof, and (C) a perfluorocarboxylic acid derivative of the general formula (III): ##STR39## wherein R 5 and R 6 are independently selected from substituted or unsubstituted monovalent hydrocarbon groups, R 7 is a substituted or unsubstituted divalent hydrocarbon group, Rf is a divalent perfluoroalkyl or perfluoroalkylether group, X is a hydrogen atom or triorganosilyl group, and letter m is equal to 2 or 3.
Claim 3
Dependent Claim
29 words
The composition of claim 1 comprising 100 parts by weight of (A), 1 to 25 parts by weight of (B), and 0.01 to 5 parts by weight of (C).
References Cited (Backward Citations)
US4734479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |