US4362836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic copolyester elastomers modified with salts of aliphatic polycarboxylic acid
Assignee: EIDP Inc
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Filing: 1980-10-24
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Granted: 1982-12-07
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Expires: 2000-10-24
Abstract
Abstract A thermoplastic copolyester elastomer composition comprising (A) a copolyester consisting essentially of a multiplicity of long-chain ester units and short-chain ester units joined through ester linkages, said long-chain ester units being represented by the formula ##STR1## and said short-chain ester units being represented by the formula ##STR2## where G is a divalent radical remaining after the removal of hydroxyl groups from at least one long-chain glycol having a melting point of less than about 55° C. and a number average molecular weight of from about 400-4000, R is a divalent radical remaining after removal of carboxyl groups from at least one dicarboxylic acid having a molecular weight of less than about 300, and D is a divalent radical remaining after the removal of hydroxyl groups from at least one aliphatic diol having a molecular weight of less than about 250, with the proviso that at least about 70 mole percent of the short-chain ester units are either ethylene terephthalate units or 1,4-butylene terephthalate units, said short-chain ester units being present in an amount of 15-95% by weight of said copolyester; and (B) from about 0.1 to 10% by weight based on said copolyester of at least one alkali metal salt of an aliphatic polycarboxylic acid containing at least 20 carbon atoms and having a molecular weight of less than about 1500.
Inventors
- 👤 Guenther K. Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
221 words
A thermoplastic copolyester elastomer composition comprising (A) a copolyester consisting essentially of a multiplicity of long-chain ester units and short-chain ester units joined through ester linkages, said long-chain ester units being represented by the formula ##STR5## and said short-chain ester units being represented by the formula ##STR6## where G is a divalent radical remaining after the removal of hydroxyl groups from at least one long-chain glycol having a melting point of less than about 55° C. and a number average molecular weight of from about 400-4000, R is a divalent radical remaining after removal of carboxyl groups from at least one dicarboxylic acid having a molecular weight of less than about 300, and D is a divalent radical remaining after the removal of hydroxyl groups from at least one aliphatic diol having a molecular weight of less than about 250, with the proviso that at least about 70 mole percent of the short-chain ester units are either ethylene terephthalate units or 1,4-butylene terephthalate units, said short-chain ester units being present in an amount of 15-95% by weight of said copolyester; and (B) from about 0.1 to 10% by weight based on said copolyester of at least one alkali metal salt of an aliphatic polycarboxylic acid containing at least 20 carbon atoms and having a molecular weight of less than about 1500.
Claim 2
Dependent Claim
221 words
A thermoplastic copolyester elastomer composition comprising (A) a copolyester consisting essentially of a multiplicity of long-chain ester units and short-chain ester units joined through ester linkages, said long-chain ester units being represented by the formula ##STR5## and said short-chain ester units being represented by the formula ##STR6## where G is a divalent radical remaining after the removal of hydroxyl groups from at least one long-chain glycol having a melting point of less than about 55° C. and a number average molecular weight of from about 400-4000, R is a divalent radical remaining after removal of carboxyl groups from at least one dicarboxylic acid having a molecular weight of less than about 300, and D is a divalent radical remaining after the removal of hydroxyl groups from at least one aliphatic diol having a molecular weight of less than about 250, with the proviso that at least about 70 mole percent of the short-chain ester units are either ethylene terephthalate units or 1,4-butylene terephthalate units, said short-chain ester units being present in an amount of 15-95% by weight of said copolyester; and (B) from about 0.1 to 10% by weight based on said copolyester of at least one alkali metal salt of an aliphatic polycarboxylic acid containing at least 20 carbon atoms and having a molecular weight of less than about 1500.
Claim 3
Dependent Claim
17 words
A composition of claim 1 where the salt of the aliphatic polycarboxylic acid contains 26-54 carbon atoms.
Claim 4
Dependent Claim
29 words
A composition of claims 1 or 2 where the salt of the aliphatic polycarboxylic acid is derived from a polycarboxylic acid containing 2 to 4 carboxyl groups per molecule.
Claim 5
Dependent Claim
23 words
A composition of claim 1 where the salt of the aliphatic polycarboxylic acid is derived from a polycarboxylic acid substantially free of unsaturation.
Claim 6
Dependent Claim
18 words
A composition of claim 1 where the salt of the aliphatic polycarboxylic acid is derived from dimer acid.
Claim 7
Dependent Claim
18 words
A composition of claim 1 where the salt of the aliphatic polycarboxylic acid is derived from trimer acid.
Claim 8
Dependent Claim
22 words
A composition of claims 1, 5, or 6 where the salt of the aliphatic polycarboxylic acid is derived from sodium or potassium.
Claim 9
Dependent Claim
29 words
A composition of claims 1, 5, or 6 modified with from about 0.5-5% by weight based on said copolyester of an alkali metal salt of an aliphatic polycarboxylic acid.
Claim 10
Dependent Claim
24 words
A composition of claim 1 where the short-chain ester units are present in an amount of from about 25-85% by weight of said copolyester.
Claim 11
Dependent Claim
20 words
A composition of claim 1 where the short-chain ester units are derived from terephthalic acid and 1,4-butanediol or ethylene glycol.
Claim 12
Dependent Claim
50 words
A composition of claim 1 where the long-chain ester units are derived from terephthalic acid and poly(tetramethylene oxide) glycol having a number average molecular weight of 600-2000 or ethylene oxide-capped poly(propylene oxide) glycol having a number average molecular weight of 1500-2800 and an ethylene oxide content of 15-35% by weight.
Claim 13
Dependent Claim
21 words
A composition of claim 1 where the molecular weight of the salt of the aliphatic polycarboxylic acid is from about 450-1000.
Claim 14
Dependent Claim
24 words
A composition of claim 11 wherein the aliphatic polycarboxylic acid is derived from a polycarboxylic acid containing 2 to 4 carboxyl groups per molecule.
Claim 15
Dependent Claim
23 words
A composition of claim 11 wherein the salt of the aliphatic polycarboxylic acid is derived from a polycarboxylic acid substantially free of unsaturation.
Claim 16
Dependent Claim
18 words
A composition of claim 11 wherein the salt of the aliphatic polycarboxylic acid is derived from dimer acid.
Claim 17
Dependent Claim
22 words
A composition of claims 13, 14 or 15 wherein the salt of the aliphatic polycarboxylic acid is derived from sodium or potassium.
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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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |