Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1978-08-08
1980-09-09
Jacobs, Lewis T.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
525408, 525411, 525425, 525449, C08K 516
Patent
active
042217032
ABSTRACT:
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 ##STR1## and said short chain units being 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 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 and (b) an effective concentration of amide linkages which on hydrolysis yield a primary amino group and a carboxyl group. Optionally up to about five percent of an antioxidant may also be present. In a specific embodiment of the instant invention the amide linkages are introduced during the preparation of the copolyetherester which assures the ultimate in uniformity of distribution and avoids a separate blending step.
REFERENCES:
patent: 3023192 (1962-02-01), Shivers
patent: 3584047 (1971-06-01), Dexter et al.
E. I. Du Pont de Nemours and Company
Jacobs Lewis T.
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