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US3856749A Expired / Lapsed US ⏱️ 0.0 years remaining

Stabilization of polymers containing poly(alkylene oxide) units

Assignee: EIDP Inc
•
Filing: 1973-04-17
•
Granted: 1974-12-24
•
Expires: 1993-04-17
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Abstract

Abstract AND SAID SHORT CHAIN UNITS BEING REPRESENTED BY THE FORMULA A stabilized copolyester composition consisting essentially of (a) a multiplicity of recurring long chain units and short chain ester units joined head-to-tail through ester linkages, said long chain ester units being represented by the formula LINKAGES WHERE X is O, S or NH and (c) up to about 5 percent by weight of an antioxidant. LINKAGES OR TAUTOMERIC WHERE G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide) glycol having a molecular weight of about 400-6000 and a carbon to oxygen ratio of about 2.0-4.3; R is a divalent radical remaining after removal of carboxyl groups from a dicarboxylic acid having a molecular weight less than about 300 and D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 250; provided said short chain ester units amount to about 15-95 percent by weight of said copolyester, (b) an effective concentration of a compound containing

Inventors

  • 👤 G Hoeschele

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 15:35
CPC Classifications
C; C08; C08K; C08K5/00; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08L; C08L67/00; C08L67/02; C08L67/025

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 46 words
A COPOLYETHERESTER COMPOSITION STABILIZED AGAINST OXIDATIVE DEGRADATION WHICH CONSISTS ESSENTIALLY OF A MIXTURE OF (A) A COPOLYETHERESTER CONTAINING A MULTIPLICITY OF RECURRING LONG CHAIN ESTER UNITS AND SHORT CHAIN ESTER UNITS JOINED HEAD-TO-TAIL THROUGH ESTER LINKAGES, SAID LONG CHAIN ESTER UNITS BEING REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim 46 words
A COPOLYETHERESTER COMPOSITION STABILIZED AGAINST OXIDATIVE DEGRADATION WHICH CONSISTS ESSENTIALLY OF A MIXTURE OF (A) A COPOLYETHERESTER CONTAINING A MULTIPLICITY OF RECURRING LONG CHAIN ESTER UNITS AND SHORT CHAIN ESTER UNITS JOINED HEAD-TO-TAIL THROUGH ESTER LINKAGES, SAID LONG CHAIN ESTER UNITS BEING REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim 24 words
The composition of claim 1 in which R'' and R'''' are independently selected from the group consisting of C2-C12 aliphatic and C4-C16 cycloaliphatic radicals.
Claim 4
Dependent Claim 17 words
The composition of claim 1 wherein the urea is formed by reacting a diisocyanate with a diamine.
Claim 5
Dependent Claim 15 words
The composition of claim 3 wherein the diisocyanate is 1,6-hexanediisocyanate and the diamine is 1,12-diamino-dodecane.
Claim 6
Dependent Claim 15 words
The composition of claim 1 wherein said antioxidant is an arylamine or a hindered phenol.
Claim 7
Dependent Claim 15 words
The composition of claim 1 wherein said antioxidant is 4,4''-bis( Alpha , Alpha -dimethylbenzyl) diphenylamine.
Claim 8
Dependent Claim 15 words
The composition of claim 1 wherein said antioxidant is 4,4''-bis( Alpha , Alpha -dimethylbenzyl) diphenylamine.
Claim 9
Dependent Claim 19 words
The composition of claim 1 wherein said antioxidant is present in the amount of 0.2 to 5 weight percent.
Claim 10
Dependent Claim 37 words
The composition of claim 7 wherein said poly(alkylene oxide) glycol is poly(tetramethylene oxide) glycol having a molecular weight of 600-2000, the diol is 1,4-butanediol and R is derived from a mixture of dimethyl terephthalate and dimethyl phthalate.
Claim 11
Dependent Claim 12 words
The composition of claim 7 wherein said dicarboxylic acid is dimethyl terephthalate.

References Cited (Backward Citations)

US3157619A Cited
US3666716A Cited
US3696170A Cited
US3547879A Cited
US3725456A Cited
US3723569A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-23 1978-06-24 1978-12-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-23 1982-06-24 1982-12-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-23 1986-06-24 1986-12-24 $7700.00 Window Closed / Lapsed

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