US4602050A
Expired / Lapsed
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Method for cross-linking organopolysilane polymers
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1985-04-08
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Granted: 1986-07-22
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Expires: 2005-04-08
Abstract
Abstract A method for cross-linking organopolysilane polymers. The method includes the steps of mixing an organopolysilane with a cross-linking agent to make a reaction mixture. The cross-linking agent includes molecules having at least two carbon-carbon double bonds and a ratio of such bonds to the molecular weight of the molecule of at least 1:150. Radical formation is then induced in the organopolysilane of the reaction mixture to cause formation of a reaction product including cross-linked organopolysilane polymers.
Inventors
- 👤 Robert C. West
- 👤 Peter I. Djurovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/5403
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
100 words
A method for cross-linking organopolysilane polymers comprising the steps of: (a) mixing an organopolysilane with a cross-linking agent to make a reaction mixture, the cross-linking agent including molecules having at least two carbon-carbon double bonds and a ratio of such bonds to the molecular weight of the molecule no less than 1 to 150; and (b) inducing radical formation in the organopolysilane of the reaction mixture using a means of inducing radical formation appropriate for the number of carbon-carbon double bonds present in the molecules of the cross-linking agent to cause formation of a reaction product including cross-linked organopolysilane polymers.
Claim 2
Independent Claim
100 words
A method for cross-linking organopolysilane polymers comprising the steps of: (a) mixing an organopolysilane with a cross-linking agent to make a reaction mixture, the cross-linking agent including molecules having at least two carbon-carbon double bonds and a ratio of such bonds to the molecular weight of the molecule no less than 1 to 150; and (b) inducing radical formation in the organopolysilane of the reaction mixture using a means of inducing radical formation appropriate for the number of carbon-carbon double bonds present in the molecules of the cross-linking agent to cause formation of a reaction product including cross-linked organopolysilane polymers.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the cross-linking agent includes at least two vinyl groups.
Claim 4
Dependent Claim
40 words
The method of claim 1 wherein the molecule of the cross-linking agent that has at least two carbon-carbon double bonds is capable of combining with like molecules to form a cross-linked polymer when placed in the presence of chemical radicals.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the cross-linking agent is an alpha, omega-bis-(trivinylsilyl)alkane.
Claim 6
Dependent Claim
11 words
The method of claim 4 wherein the cross-linking agent is 1,2-bis(trivinylsilyl)ethane.
Claim 7
Dependent Claim
11 words
The method of claim 4 wherein the cross-linking agent is 1,6-bis(trivinylsilyl)hexane.
Claim 8
Dependent Claim
43 words
The method of claim 1 wherein the step of inducing radical formation in the organopolysilane includes introducing a chemical radical initiator into the reaction mixture and then heating the reaction mixture, and wherein the cross-linking agent has four or more carbon-carbon double bonds.
Claim 9
Dependent Claim
33 words
The method of claim 1 wherein the step of inducing radical formation in the organopolysilane includes exposing the reaction mixture to electromagnetic radiation of a selected wave length no less than 200 mm.
Claim 10
Dependent Claim
24 words
The method of claim 8 in which the reaction mixture contains no chemically effective quantity of a chemical radical initiator separate from the organopolysilane.
Claim 11
Dependent Claim
20 words
The method of claim 8 wherein the electromagnetic radiation has a wave length within the range 250 to 350 mm.
Claim 12
Dependent Claim
24 words
An alpha, omega-bis(trivinylsilyl)alkane having the formula (Vi) 3 Si--R--Si(Vi) 3 wherein R is a saturated carbon chain including from 1 to 10 carbon atoms.
Claim 13
Dependent Claim
24 words
An alpha, omega-bis(trivinylsilyl)alkane having the formula (Vi) 3 Si--R--Si(Vi) 3 wherein R is a saturated carbon chain including from 1 to 10 carbon atoms.
Claim 14
Dependent Claim
11 words
The compound of claim 11 wherein the alpha, omega-bis(trivinylsilyl)alkane is 1,2-bis(trivinylsilyl)ethane.
Claim 15
Dependent Claim
11 words
The compound of claim 11 wherein the alpha, omega-bis(trivinylsilyl)alkane is 1,6-bis(trinvinylsilyl)hexane.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |