Patent EP0891903A2 successfully refreshed from Google Patents.
US4520148A
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US
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Thermoplastic elastomer compositions
Assignee: GAF Corp
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Filing: 1983-12-01
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Granted: 1985-05-28
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Expires: 2003-12-01
Abstract
Abstract Segmented thermoplastic copolyester elastomers containing recurring polymeric long chain ester units derived from phthalic acids and long chain glycols and short chain ester units derived from phthalic acids and 1,4-butanediol or 1,4-butenediol. The elastomers also contain small amounts of a guanidine stabilizer and preferably also contain small amounts of phosphorus stabilizer and diphenylamine.
Inventors
- 👤 Michael D. Golder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/31; C08K5/315
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
172 words
Thermoplastic elastomer composition consisting essentially of: (a) segmented thermoplastic copolyester elastomer consisting essentially of a multiplicity of recurring long chain ester units and short chain ester units joined head to tail through ester linkages, said long chain units being represented by the formula ##STR8## and said short chain units being represented by the formula ##STR9## where G is a divalent radical remaining after the removal of the terminal hydroxyl groups from a difunctional polyether glycol having a number average molecular weight in the range from about 400 to about 6,000, R is a hydrocarbon radical remaining after removal of the carboxyl groups from terephthalic acid or isophthalic acid, and D is a divalent radical remaining after removal of hydroxyl groups from 1,4-butanediol or 1,4-butenediol; provided, said short chain units amount to between about 30% and about 85% by weight of the copolyester; and (b) between about 0.05 and about 5% by weight of said copolyester of guanidine stabilizer of the formula ##STR10## where n is an integer between 2 and about 20
Claim 2
Dependent Claim
172 words
Thermoplastic elastomer composition consisting essentially of: (a) segmented thermoplastic copolyester elastomer consisting essentially of a multiplicity of recurring long chain ester units and short chain ester units joined head to tail through ester linkages, said long chain units being represented by the formula ##STR8## and said short chain units being represented by the formula ##STR9## where G is a divalent radical remaining after the removal of the terminal hydroxyl groups from a difunctional polyether glycol having a number average molecular weight in the range from about 400 to about 6,000, R is a hydrocarbon radical remaining after removal of the carboxyl groups from terephthalic acid or isophthalic acid, and D is a divalent radical remaining after removal of hydroxyl groups from 1,4-butanediol or 1,4-butenediol; provided, said short chain units amount to between about 30% and about 85% by weight of the copolyester; and (b) between about 0.05 and about 5% by weight of said copolyester of guanidine stabilizer of the formula ##STR10## where n is an integer between 2 and about 20
Claim 3
Dependent Claim
64 words
Elastomer composition according to claim 1 which also includes: (a) between about 0.1 and about 5% by weight of said copolyester of diphenylamine derivative of the formula ##STR11## where R and R 1 are methyl or phenyl; and (b) between about 0.05 and about 3% by weight of said copolyester of phosphorus compound of the formula ##STR12## where t represents a tertiary butyl radical.
Claim 4
Dependent Claim
12 words
Elastomer composition according to claim 1 wherein the guanidine stabilizer is 1,6-hexamethylenebis-dicyandiamide.
Claim 5
Dependent Claim
27 words
Elastomer according to claim 1 wherein between about 10% and about 40% of the D groups represent divalent radicals remaining after removal of hydroxyl groups from 1,4-butenediol.
Claim 6
Dependent Claim
106 words
Elastomer composition according to claim 1 wherein: (a) G is a divalent radical remaining after removal of terminal hydroxy groups from a difunctional polyether glycol having a carbon to oxygen ratio between about 2.5 and about 4.3 to 1; (b) at least about 80% of the R groups of formulas I and II are hydrocarbon radicals remaining after removal of carboxyl groups from terephthalic acid; (c) the short chain units amount to between about 40 and about 65% by weight of the copolyester; and (d) between about 20 and about 30% of the D groups represent divalent radicals remaining after removal of hydroxyl groups from 1,4-butenediol.
Claim 7
Dependent Claim
23 words
Elastomer composition according to claim 5 wherein G is a divalent radical remaining after removal of terminal hydroxy groups from poly(tetramethylene oxide) glycol.
Claim 8
Dependent Claim
29 words
Elastomer composition according to claim 1 which also includes between about 0.1% and about 5% by weight of said copolyester of 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid triester with 1,3,5-tris-(2-hydroxyethyl)-s-triazine-2,4,6-(1H, 3H, 5H) trione.
Claim 9
Dependent Claim
20 words
Elastomer according to claim 1 wherein the D groups represents divalent radicals remaining after removal of hydroxyl groups from 1,4-butanediol.
Claim 10
Dependent Claim
13 words
Elastomer composition according to claim 4 wherein the guanidine stabilizer is 1,6 hexamethylenebis-dicyandiamide.
Claim 11
Dependent Claim
118 words
Elastomer composition according to claim 9 wherein: (a) G is a divalent radical remaining after removal of terminal hydroxyl groups from poly(tetramethylene oxide) glycol; (b) at least about 80% of the R groups of formulas I and II are hydrocarbon radicals remaining after removal of carboxyl groups from terephthalic acid; (c) the short chain units amount to between about 40 and about 65% by weight of the copolyester; (d) between about 20 and about 30% of the D groups represent divalent radicals remaining after removal of hydroxyl groups from 1,4-butenediol; and (e) the elastomer composition also includes between about 0.1% and about 5% by weight of said copolyester of 3,5-di-tert-butyl 4-hydroxyhydrocinnamic acid triester with 1,3,5-tris-(2-hydroxyethyl)-s-triazine-2,4,6-(1H, 3H, 5H) trione.
Claim 12
Dependent Claim
64 words
Elastomer composition according to claim 10 which also includes: (a) between about 0.1 and about 5% by weight of said copolyester of diphenylamine derivative of the formula ##STR13## where R and R 1 are methyl or phenyl; and (b) between about 0.05 and about 3% by weight of said copolyester of phosphorus compound of the formula ##STR14## where t represents a tertiary butyl radical.
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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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |