US4419484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organopolysiloxane molding compositions
Assignee: Bayer AG
•
Filing: 1982-01-22
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Granted: 1983-12-06
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Expires: 2002-01-22
Abstract
Abstract The present invention relates organopolysiloxane molding compositions which are capable of storage in the absence of moisture and which crosslink to give elastomers after the admission of water or steam, and are based on α,ω-dihydroxyorganopolysiloxanes and substances which produce crosslinking, a short-chain siloxane of the general formula ##STR1## being added, in addition to customary additives.
Inventors
- 👤 Hans Sattlegger
- 👤 Karl Schnurrbusch
- 👤 Theo Achtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
In a one component organopolysiloxane molding composition, which in the presence of water or steam crosslinks to give elastomers, comprising (A) an α,ω-dihydroxyorganopolysiloxane of a viscosity of about 500 to 2,000,000 cP (20° C.) (B) a crosslinking agent, (C) a filler, pigment and/or conventional auxiliary, and (D) optionally a hardening catalyst, (E) the improvement which comprises about 0.1 to 15% by weight of the total composition of hexamethyldisiloxane whereby the composition is capable of prolonged storage in the absence of moisture without loss of properties.
Claim 2
Dependent Claim
85 words
In a one component organopolysiloxane molding composition, which in the presence of water or steam crosslinks to give elastomers, comprising (A) an α,ω-dihydroxyorganopolysiloxane of a viscosity of about 500 to 2,000,000 cP (20° C.) (B) a crosslinking agent, (C) a filler, pigment and/or conventional auxiliary, and (D) optionally a hardening catalyst, (E) the improvement which comprises about 0.1 to 15% by weight of the total composition of hexamethyldisiloxane whereby the composition is capable of prolonged storage in the absence of moisture without loss of properties.
Claim 3
Dependent Claim
17 words
A composition according to claim 1, wherein (E) is present in about 1 to 4% by weight.
Claim 4
Dependent Claim
12 words
A composition according to claim 1, wherein the crosslinking agent comprises ethyl-triacetoxysilane.
Claim 5
Dependent Claim
26 words
A composition according to claim 1, wherein the crosslinking agent comprises ethyl-triacetoxysilane, and (E) comprises hexamethyldisiloxane and is present in about 1 to 4% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |