Texaco Chemical Company

Richele T Howelton

George P Speranza

Richard J Dominguez

Richard J Clark

David E Bergbreiter

Alan Letton

Gerhard K Guenther

Pei-Hua Wang

Chih-Chien Hsu

Described are carboxyl-terminated polyetheramides of the formula: ##STR1## where R is a moiety from an alcohol or hydroxy compound having a valence of k; R' is independently hydrogen or lower alkyl from 1 to 4 carbon atoms; R' is independently a straight or branched alkylene or aromatic moiety averaging from about 2 to 36 carbon atoms; x averages from about 2 to 100; z averages from about 20 to about 250; k averages from about 1 to 3; m is 0 or 1; and p is independently 5 to 11. Because the carboxyl-terminated polyetheramides are all carboxyl-terminated, they do not gel. They are expected to have good impact strength as well as differing solubilities depending on the polyetheramine incorporated.

Carboxyl-terminated polyetheramines

Amidamines of the following formula are described: ##STR1## where R is independently hydrogen or lower alkyl of 1 to 4 carbon atoms;

Polyamidopolyfunctional amine from lactam and ether amine

Disclosed is an alternating block copolymer composition useful for enhancing the crystallization of bisphenol-A polycarbonate which comprises the reaction product of a polyoxyalkylene polyamine and poly(ethylene)terephthalate. Also disclosed is a method of synthesizing the alternating block copolymer and a method of using the block copolymer composition in the crystallization of bisphenol-A polycarbonate.

Crystallization agent for bisphenol-A polycarbonate

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Austin, TX, United States of America

Richele T Howelton