Claims
- 1. A stabilized copolyetherester composition consisting essentially of a mixture of (a) a copolyetherester 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 ester units being represented by the formula ##STR13## and said short chain ester units being represented by the formula ##STR14## where G is a divalent radical remaining after 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% by weight of said copolyetherester, and (b) an amide-containing phenolic antioxidant of the formula ##STR15## wherein R' and R" are aliphatic hydrocarbon radicals or substituted aliphatic hydrocarbon radicals containing 2-12 carbon atoms and wherein R' is substituted with the radical of the formula ##STR16## where R''' is a tertiary alkyl group, said amide-containing phenolic antioxidant being present in an amount sufficient to provide at least about 0.015 weight percent amide linkages thus stabilizing the copolyetherester against oxidative degradation at elevated temperatures by serving both as an antioxidant and a source of amide linkages.
- 2. A stabilized copolyetherester composition of claim 1 wherein the poly(alkylene oxide) glycol is poly(tetramethylene oxide) glycol, the dicarboxylic acid is isophthalic, terephthalic, phthalic or mixtures thereof and the diol is 1,4-butanediol.
- 3. A stabilized copolyetherester composition of claim 2 wherein the amide-containing phenolic antioxidant is 1,6-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamido] hexane.
- 4. A stabilized copolyetherester composition of claim 1 wherein the amide-containing phenolic antioxidant is 1,6-bis[3,(3,5-di-tert-butyl-4-hydroxyphenyl)propionamido] hexane.
Parent Case Info
This is a continuation of application Ser. No. 586,744, filed June 11, 1975, now abandoned, which is a continuation of application Ser. No. 441,659, filed Feb. 11, 1974, now abandoned, which is a division of application Ser. No. 316,268, filed Dec. 18, 1972, now U.S. Pat. No. 3,896,078.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3023192 |
Shivers |
Feb 1962 |
|
3584047 |
Dexter et al. |
Jun 1971 |
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Foreign Referenced Citations (1)
Number |
Date |
Country |
46-37423 |
Nov 1971 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
316268 |
Dec 1972 |
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Continuations (2)
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Number |
Date |
Country |
Parent |
586744 |
Jun 1975 |
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Parent |
441659 |
Feb 1974 |
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