US4355155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic copolyester elastomer
Assignee: Hoechst Celanese Chemical Co
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Filing: 1980-10-14
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Granted: 1982-10-19
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Expires: 2000-10-14
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 a mixture of 1,4-butanediol and 1,4-butenediol.
Inventors
- 👤 Suzanne B. Nelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:53
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
161 words
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 ##STR3## and said short chain units being represented by the formula ##STR4## where G is a divalent radical remaining after the removal of the terminal hydroxyl groups from a difunctional polyether glycol having a 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 terephthalatic 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, (a) said short chain segments amount to between about 30% and about 85% by weight of the copolyester, and (b) between about 10% and about 40% of the D groups represent divalent radicals remaining after removal of hydroxyl groups from 1,4 butenediol.
Claim 2
Dependent Claim
161 words
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 ##STR3## and said short chain units being represented by the formula ##STR4## where G is a divalent radical remaining after the removal of the terminal hydroxyl groups from a difunctional polyether glycol having a 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 terephthalatic 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, (a) said short chain segments amount to between about 30% and about 85% by weight of the copolyester, and (b) between about 10% and about 40% of the D groups represent divalent radicals remaining after removal of hydroxyl groups from 1,4 butenediol.
Claim 3
Dependent Claim
37 words
Elastomer according to claim 1 wherein 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 2.0 and about 4.3 to 1.
Claim 4
Dependent Claim
23 words
Elastomer according to claim 1 wherein the short claim segments amount to between about 45 and about 65% by weight of the copolyester.
Claim 5
Dependent Claim
28 words
Elastomer according to claim 1 wherein between about 20 and about 30% of the D groups represent divalent radicals remaining after removal of hydroxyl groups from 1,4 butenediol.
Claim 6
Dependent Claim
30 words
Elastomer according to claim 4 wherein between about 1 and about 20% of the R groups are hydrocarbon radicals remaining after removal of the carboxyl groups from dimethyl isophthalic acid.
Claim 7
Dependent Claim
21 words
Elastomer according to claim 1 wherein G is a divalent radical remaining after removal of terminal hydroxyl groups from poly(tetramethylene oxide)glycol.
Claim 8
Dependent Claim
21 words
Elastomer according to claim 1 wherein G is a divalent radical remaining after removal of terminal hydroxyl groups from poly(ethylene oxide)glycol.
Claim 9
Dependent Claim
21 words
Elastomer according to claim 5 wherein G is a divalent radical remaining after removal of terminal hydroxyl groups from poly(tetramethylene oxide)glycol.
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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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |