Patent US4960844A successfully refreshed from Google Patents.
US4960844A
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Silane terminated liquid polymers
Assignee: PRC Desoto International Inc
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Filing: 1988-08-03
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Granted: 1990-10-02
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Expires: 2008-08-03
Abstract
Abstract A liquid polymer which is rapidly curable, at room temperature, to a solid hydrolytically stable elastomer having high tensile and tear strengths, said liquid polymer having the formula: ##STR1## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R 1 is lower alkyl, R 2 is lower alkyl, R 3 is a divalent organic radical having no sulfur atoms, R 4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R 5 --S-- wherein R 5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3. There is also disclosed a method for curing such liquid polymers.
Inventors
- 👤 Hakam Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/837
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
172 words
A liquid polymer which is rapidly curable, at room temperature, to a solid hydrolytically stable elastomer having high tensile and tear strengths, said liquid polymer having the formula: ##STR5## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R 1 is lower alkyl, R 2 is lower alkyl, R 3 is a divalent organic radical having no sulfur atoms, R 4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R 5 --S-- wherein R 5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3.
Claim 2
Dependent Claim
172 words
A liquid polymer which is rapidly curable, at room temperature, to a solid hydrolytically stable elastomer having high tensile and tear strengths, said liquid polymer having the formula: ##STR5## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R 1 is lower alkyl, R 2 is lower alkyl, R 3 is a divalent organic radical having no sulfur atoms, R 4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R 5 --S-- wherein R 5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3.
Claim 3
Dependent Claim
21 words
A liquid polymer according to claim 1 wherein R has a number average molecular weight of between about 1,500 and 20,000.
Claim 4
Dependent Claim
11 words
A liquid polymer according to claim 2 wherein R is polyether.
Claim 5
Dependent Claim
11 words
A liquid polymer according to claim 2 wherein R is polythioether.
Claim 6
Dependent Claim
17 words
A liquid polymer according to claim 1 wherein R 1 is methyl and R 2 is methyl.
Claim 7
Dependent Claim
16 words
A liquid polymer according to claim 1 wherein R 1 is methyl and m is 3.
Claim 8
Dependent Claim
11 words
A liquid polymer according to claim 1 wherein X is sulfur.
Claim 9
Dependent Claim
12 words
A liquid polymer according to claim 7 wherein R 4 is propylene.
Claim 10
Dependent Claim
13 words
A liquid polymer according to claim 1 wherein X is --S--R 5 --S--.
Claim 11
Dependent Claim
19 words
A liquid polymer according to claim 9 wherein R 5 is alkylene of from 2 to 6 carbon atoms.
Claim 12
Dependent Claim
20 words
A liquid polymer according to claim 9 wherein R 5 is alkylene ether of from 4 to 12 carbon atoms.
Claim 13
Dependent Claim
173 words
A cured liquid polymer which is cured using organo titanate to a solid hydrolytically stable elastomer which has high tensile and tear strengths, said liquid polymer having the formula: ##STR6## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R 1 is lower alkyl, R 2 is lower alkyl, R 3 is a divalent organic radical having no sulfur atoms, R 4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R 5 --S-- wherein R 5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3.
Claim 14
Dependent Claim
173 words
A cured liquid polymer which is cured using organo titanate to a solid hydrolytically stable elastomer which has high tensile and tear strengths, said liquid polymer having the formula: ##STR6## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R 1 is lower alkyl, R 2 is lower alkyl, R 3 is a divalent organic radical having no sulfur atoms, R 4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R 5 --S-- wherein R 5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3.
Claim 15
Dependent Claim
22 words
A cured liquid polymer according to claim 12 wherein R has a number average molecular weight of between about 1,500 and 20,000.
Claim 16
Dependent Claim
15 words
A cured liquid polymer according to claim 13 wherein said organo-titanate is an aliphatic titanate.
Claim 17
Dependent Claim
15 words
A cured liquid polymer according to claim 13 wherein said organo-titanate is lower alkyl titanate.
Claim 18
Dependent Claim
33 words
A cured liquid polymer according to claim 13 wherein the amount of organo-titanate is from about 0.5 weight percent to about 10 weight percent based on the weight of said cured liquid polymer.
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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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |