Method for the preparation of copolyester elastomer having high

Details Method for the preparation of copolyester elastomer having high Method for the preparation of copolyester elastomer having high

1993-07-23

1995-04-18

Acquah, Samuel A.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

528176, 528191, 528194, 528195, 528272, 528275, 528295, 528301, 528302, 525437, 525444, C08K 541

Patent

active

054079810

ABSTRACT:
A method for preparation of a polyether-ester elastomer. The method comprises admixturing dibasic acid with short chain diol for the formation of a short chain ester monomer represented :into general formula (I) and with polyglycol for the formation of a long chain ether moromet represented into general formula (II), adding the alkali salt of dialkylsufoisophthalate to the admixture to react the admixture until the discharge of methanol is tip to above 70%, adding stabilizing agent to perform the polymerization reaction, and then, blending phenolic alkali metal salt. ##STR1## wherein R is a biradical obtained by removing carboxyl group from a dicarboxylic acid having a molecular weight not more than 400,

REFERENCES:
patent: 4295652 (1981-10-01), Saito et al.
patent: 5073455 (1991-12-01), Nose et al.
CA116(26):256293r; CA96(26):219463u; CA106(2):6380c; CA80(16):84567c.

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