US4371693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic elastomeric polyetheresterimides
Assignee: EIDP Inc
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Filing: 1981-10-02
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Granted: 1983-02-01
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Expires: 2001-10-02
Abstract
Abstract Thermoplastic elastomeric polyetheresterimides comprising a multiplicity of long chain ester imide units represented by the formula ##STR1## and short chain esterimide units represented by the formula ##STR2## where G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide) glycol having a number average molecular weight of about 400-4000; D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 300, and Q is a divalent radical remaining after removal of an amino group and a carboxyl group from a aliphatic primary amino acid having a molecular weight of less than 250; with the proviso that from about 2 to 10 of said short chain esterimide units are present for each of said long chain esterimide units.
Inventors
- 👤 James R. Wolfe, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A thermoplastic elastomeric polyetheresterimide comprising a multiplicity of long chain esterimide units being represented by the formula ##STR7## and short chain esterimide units being represented by the formula ##STR8## where G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide)glycol having a number average molecular weight of about 400-4000; D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 300 and Q is a divalent radical remaining after removal of an amino group and a carboxyl group from an aliphatic primary amino acid having a molecular weight of less than 250; with the proviso that from about 2 to 10 of said short chain esterimide units are present for each of said long chain esterimide units.
Claim 2
Dependent Claim
134 words
A thermoplastic elastomeric polyetheresterimide comprising a multiplicity of long chain esterimide units being represented by the formula ##STR7## and short chain esterimide units being represented by the formula ##STR8## where G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide)glycol having a number average molecular weight of about 400-4000; D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 300 and Q is a divalent radical remaining after removal of an amino group and a carboxyl group from an aliphatic primary amino acid having a molecular weight of less than 250; with the proviso that from about 2 to 10 of said short chain esterimide units are present for each of said long chain esterimide units.
Claim 3
Dependent Claim
16 words
A polyetheresterimide of claim 1 wherein the divalent radical Q is derived from glycine or β-alanine.
Claim 4
Dependent Claim
21 words
A polyetheresterimide of claims 1 or 2 wherein the divalent radical D is derived from ethylene glycol, 1,2-propylene glycol or 1,4-butanediol.
Claim 5
Dependent Claim
43 words
A polyetheresterimide of claims 1 or 2 wherein the divalent radical G is derived from poly(tetramethylene oxide) glycol having a molecular weight of 600-2200 or ethylene oxide-capped poly(propylene oxide) glycol having a molecular weight of 600-2800 and containing 5-35% by weight ethylene oxide.
Claim 6
Dependent Claim
41 words
A polyetheresterimide of claim 1 wherein the divalent radical Q is derived from glycine, the divalent radical D is derived from ethylene glycol and the divalent radical G is derived from poly(tetramethylene oxide) glycol having a number molecular weight of 600-2200.
Claim 7
Dependent Claim
57 words
Process for the preparation of the polyetheresterimide of claims 1 or 5 by melt condensation of a mixture of trimellitic anhydride, an aliphatic primary amino acid, a poly(alkylene oxide) glycol and a molar excess of a low molecular weight diol, said trimellitic anhydride and said amino acid being present in a molar ratio of 1.0:0.85 to 1.0:1.15.
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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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |