Patent number: 4102864
Abstract: Polyester condensates of aromatic dicarboxylic acids and diphenols containing 1,2-bis(hydroxyphenyl)ethane in which the hydroxyl is in the 3 or 4 position.The component acids are selected from the group consisting of isophthalic acid, terephthalic acid, 3,3'-, 3,4'- and 4,4'-bibenzoic acids, 1,3-, 1,4-, 1,5-, 1,6-, 1,7-, 1,8-, 2,6-, and 2,7-naphthalenedicarboxylic acids and acids represented by the formula: ##STR1## wherein the carboxyl groups are in the 3- or 4- positions, and X is O, S, SO.sub.2, C.dbd.O, CH.sub.2, CH.sub.2 CH.sub.2, CH(CH.sub.3) or C(CH.sub.3).sub.2.The diphenol comprises 1,2-bis(hydroxyphenyl)ethane and optionally a diphenol selected from the group consisting of resorcinol, hydroquinone, 3,3'-, 3,4'- and 4,4'-diphenols, 1,3-, 1,4-, 1,5-, 1,6-, 1,7-, 1,8-, 2,6- and 2,7-dihydroxynaphthalenes and diphenols represented by the formula: ##STR2## wherein the hydroxyl groups are in the 3- or 4- positions and Y is O, S, SO.sub.2, C.dbd.O, CH.sub.2, CH(CH.sub.3), C(CH.sub.3).sub.2 or (CH.sub.2).
Type:
Grant
Filed:
July 28, 1976
Date of Patent:
July 25, 1978
Assignee:
Monsanto Company
Inventors:
Oliver D. Deex, Virgil W. Weiss