US4487906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting organopolysiloxane compositions
Assignee: Bayer AG
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Filing: 1983-07-13
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Granted: 1984-12-11
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Expires: 2003-07-13
Abstract
Abstract In a polysiloxane rubber composition which vulcanizes under heat to form an elastomer and comprising (a) a polyorganosiloxane containing unsaturated radicals, (b) a compound containing Si-H groups, (c) a platinum-containing addition catalyst, and (d) an organic peroxide, the improvement which comprises (e) a compound capable of forming a complex ligand with platinum, whereby the storability of the composition is improved.
Inventors
- 👤 Wilfried Kniege
- 👤 Werner Michel
- 👤 J/u/ rgen Ackermann
- 👤 Karl-Heinz Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
In a polysiloxane rubber composition which vulcanizes under heat to form an elastomer, comprising (a) a polyorganosiloxane containing unsaturated radicals, (b) a compound containing Si-H groups, (c) a platinum-containing addition catalyst, and (d) an organic peroxide, the improvement which comprises (e) a compound capable of forming a complex ligand with platinum and selected from the group consisting of triallyl cyanurate, triallyl citrate and bistrimethylsilyl-urea, whereby the storability of the composition is improved.
Claim 2
Dependent Claim
72 words
In a polysiloxane rubber composition which vulcanizes under heat to form an elastomer, comprising (a) a polyorganosiloxane containing unsaturated radicals, (b) a compound containing Si-H groups, (c) a platinum-containing addition catalyst, and (d) an organic peroxide, the improvement which comprises (e) a compound capable of forming a complex ligand with platinum and selected from the group consisting of triallyl cyanurate, triallyl citrate and bistrimethylsilyl-urea, whereby the storability of the composition is improved.
Claim 3
Dependent Claim
14 words
A composition according to claim 1, wherein the organic peroxide (d) is dichlorobenzoyl peroxide.
Claim 4
Dependent Claim
13 words
A composition according to claim 1, wherein the ligand-former (e) is triallyl cyanurate.
Claim 5
Dependent Claim
12 words
A composition according to claim 1, wherein the ligand-former (e) is bis-trimethylsilyl-urea.
Claim 6
Dependent Claim
16 words
A composition according to claim 1, wherein the catalyst (c) is soluble in the polyorganosiloxane (a).
Claim 7
Dependent Claim
25 words
A composition according to claim 2, wherein the ligand-former (e) is triallyl cyanurate or bis-trimethylsilyl-urea and the catalyst (c) is soluble in the polyorganosiloxane (a).
Claim 8
Dependent Claim
26 words
A process for producing a composition according to claim 1, comprising pre-mixing (a), (b) and (c), mixing (d) with (e), and then combining the two mixtures.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |