Preparation of multiply-branched aliphatic-aromatic polyesters a

Details Preparation of multiply-branched aliphatic-aromatic polyesters a Preparation of multiply-branched aliphatic-aromatic polyesters a

1992-07-13

1993-07-13

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528167, 528173, 528205, 528206, 528208, 528327, C08G 6300, C08G 6306, C08G 6366

Patent

active

052274624

ABSTRACT:
A multiply-branched aliphatic-aromatic polyester and a method for producing that polymer. The method comprises condensing a branching reactant represented by the general formula ##STR1## Each j is 1 or 2, each Ar is independently selected from the group consisting of aromatic and heteroaromatic moieties having a total of ring carbons and heteroatoms of from 5 to about 20, each R.sup.1 is a linking group independently selected from alkyl having from 1 to about 6 carbons, fluoroalkyl having from 1 to about 6 carbons, --O--, --S--, --C.tbd.C--, and ##STR2## Z.sup.1 is selected from the group consisting of hydroxyl and --OSi(CH.sub.3).sub.3, and each Z.sup.2 is independently selected from groups having the structural formula ##STR3## wherein each R.sup.2 is independently selected from the group consisting of hydroxy, chloro, bromo, monovalent alkoxide having from 1 to about 6 carbons, and --O--(CH.sub.2).sub.g --OH, wherein g is an integer from 1 to 3, or Z.sup.1 has the structural formula ##STR4## wherein each R.sup.2 is independently selected from the group consisting of hydroxy, chloro, bromo, monovalent alkoxide having from 1 to about 6 carbons, and --O--(CH.sub.2).sub.g --OH, wherein g is an integer from 1 to 3, and each Z.sup.2 is hydroxyl.

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