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US3899456A
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Siloxane vulcanizates and a method for the preparation thereof
Assignee: Olin Corp
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Filing: 1974-02-19
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Granted: 1975-08-12
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Expires: 1994-02-19
Abstract
Abstract Novel siloxane vulcanizates are prepared by the room temperature vulcanization of selected siloxane polymers which contain an electron donating substituent as a leaving group.
Inventors
- 👤 John F Sieckhaus
- 👤 Robert N Scott
- 👤 Trescott B Larchar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:31
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
14 words
A METHOD FOR PREPARING SILOXANE VULCANIZATES COMPRISING ADDING A POLYMER OF THE FOLLOWING FORMULA:
Claim 2
Independent Claim
14 words
A METHOD FOR PREPARING SILOXANE VULCANIZATES COMPRISING ADDING A POLYMER OF THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein said alkyl R and R'' groups are one to four carbon atoms, said aryl R and R'' groups are six to 10 carbon atoms and x is 1 or 2.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein n is about 20 to about 1,000.
Claim 5
Dependent Claim
29 words
The method of claim 3 wherein said electron donating substituent is selected from the group consisting of o-, m- and p-methyl, 2,6 dimethyl, 2,4,6 trimethyl and o- and p-methoxy.
Claim 6
Dependent Claim
74 words
The method of claim 4 wherein from about 0 to about 200 parts by weight of a filler per 100 parts by weight of polymer, from about 0.1 to about 30 parts by weight of an antioxdant per 100 parts by weight of polymer and a crosslinking agent in amounts of from about 0 to about 50 mole % of the replaceable electron donating substituent groups in the polymer, are added to the mixture.
Claim 7
Dependent Claim
39 words
The method of claim 5 wherein said crosslinking agent is selected from the group consisting of polyhydroxyphenols, disilanols, Alpha , omega dihydroxypolydialkylsiloxanes, dihydroxy o- and m-carboranes, aliphatic glycols containing two to 10 carbon atoms and dihydroxy terminated glycol ethers.
Claim 8
Dependent Claim
20 words
The method of claim 5 wherein all R and R'' groups are methyl except one R'' group which is tolyl.
Claim 9
Dependent Claim
9 words
The method of claim 7 wherein x is 2.
Claim 10
Dependent Claim
13 words
The method of claim 8 wherein said Lewis acid catalyst is stannous 2-ethylhexoate.
Claim 11
Dependent Claim
10 words
The siloxane vulcanizate prepared by the method of claim 3.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |