US4434283A
Expired / Lapsed
US
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Polysiloxane molding compositions
Assignee: Bayer AG
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Filing: 1982-02-08
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Granted: 1984-02-28
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Expires: 2002-02-08
Abstract
Abstract In a polysiloxane molding composition which in the presence of water crosslinks to an elastomer and which comprises (A) an α,ω-dihydroxyorganopolysiloxane with a viscosity of about 500 to 2,000,000 cP, (B) a crosslinking agent, and (C) a reinforcing filler, the improvement which comprises including therein in about 0.1 to 10% by weight a silicon compound containing at least 3 alkoxy groups and preferably of the formula R.sub.n Si(Alkoxy).sub.4-n in which R is alkyl with 1 to 10 carbon atoms, Alkoxy has 1 to 4 carbon atoms, and n is 0 or 1, whereby the elastomer ultimately produced exhibits improved direct adhesion to various substrates.
Inventors
- 👤 Hans Sattlegger
- 👤 Karl Schnurrbusch
- 👤 Bruno Degen
- 👤 Theo Achtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
In a polysiloxane molding composition which in the presence of water crosslinks to an elastomer and which comprises (A) an α,ω-dihydroxyorganopolysiloxane with a viscosity of about 500 to 2,000,000 cP, (B) a crosslinking agent, and (C) a reinforcing filler, the improvement which comprises including therein in about 0.1 to 10% by weight a silicon compound containing at least 3 alkoxy groups and employing as the crosslinking agent an alkoxybenzamidosilane or an alkoxypropionamidosilane whereby the elastomer ultimately produced exhibits improved direct adhesion to various substances.
Claim 2
Dependent Claim
84 words
In a polysiloxane molding composition which in the presence of water crosslinks to an elastomer and which comprises (A) an α,ω-dihydroxyorganopolysiloxane with a viscosity of about 500 to 2,000,000 cP, (B) a crosslinking agent, and (C) a reinforcing filler, the improvement which comprises including therein in about 0.1 to 10% by weight a silicon compound containing at least 3 alkoxy groups and employing as the crosslinking agent an alkoxybenzamidosilane or an alkoxypropionamidosilane whereby the elastomer ultimately produced exhibits improved direct adhesion to various substances.
Claim 3
Dependent Claim
40 words
A composition according to claim 1, wherein the silicon compound is of the formula R.sub.n Si(Alkoxy).sub.4-n in which R is alkyl with 1 to 10 carbon atoms, Alkoxy has 1 to 4 carbon atoms, and n is 0 or 1.
Claim 4
Dependent Claim
12 words
A composition according to claim 1, which further contains a curing catalyst.
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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |