Method for the preparation of copolyester elastomer having high viscosity
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United States of America Patent
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Apr 18, 1995
Grant Date -
N/A
app pub date -
Jul 23, 1993
filing date -
Dec 26, 1992
priority date (Note) -
Expired
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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, D is a biradical obtained by removing hydroxyl group from a short chain diol having a molecular weight not more than 250, and G is a biradical obtained by removing hydroxyl group from a long chain ether glycol having a molecular weight of a range of about 400 to 4,000.
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