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US3860554A
Expired / Lapsed
US
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Silicone rubber composition yielding a structural ash on combustion
Assignee: Wacker Chemical Corp
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Filing: 1973-07-23
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Granted: 1975-01-14
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Expires: 1993-07-23
Abstract
Abstract A silicone rubber formulation incorporating sodium metasilicate and an inorganic compound, preferably nickelous oxide, having a melting point exceeding that of sodium metasilicate. On catalytic vulcanization of the formulation, a rubber-like composition results which on combustion yields a cohesive, rigid ceramic material.
Inventors
- 👤 Carl Newton Bruns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:55
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
13 words
The composition of claim 1 wherein the inorganic mineral compound is nickelous oxide.
Claim 2
Independent Claim
102 words
A method for preparing a ceramic composition having structural integrity which comprises heating a composition containing a trimethylsiloxy end-blocked copolmer consisting essentially of chemically combined dimethylsiloxane units and methylvinyl siloxane units, a peroxide catalyst, from about 20 to about 100 parts by weight based on 100 parts by weight of the gum copolymer of sodium metasilicate and from about 5 to about 20 parts by weight based on 100 parts by weight of the gum copolymer of an inorganic mineral compound having a melting point higher than sodium metasilicate to a combustion temperature of from about 500* F. to about 6,000* F.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the composition is first heated to the vulcanization temperature and then heated to the combustion temperature of the composition.
Claim 4
Dependent Claim
23 words
The method of claim 4 wherein the composition is heated to a vulcanization temperature of from about 240* F. to about 400* F.
Claim 5
Dependent Claim
22 words
The method of claim 4 wherein the composition is heated to a combustion temperature of from about 500* F. to 1,400* F.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |