Low-crystallization-speed polyesters, and process for their preparation
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United States of America Patent
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Nov 30, 1993
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N/A
app pub date -
Jul 15, 1992
filing date -
Jul 18, 1991
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Expired
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Abstract
Low-crystallization-speed polyesters obtained by means of the polycondensation of 2,6-naphthalene-dicarboxy acid with at least one (C.sub.2 -C.sub.10)-(cyclo)alkylene glycol in the presence of 0.5-50 mol % of a copolymerizable reactant of general formula: ROOC--Ar--OOC--Ar'--COO--Ar--COOR (I) wherein Ar and Ar' stand for aromatic radicals, and R stands for a hydrogen atom or a (C.sub.1 -C.sub.4)-alkyl radical, or the OR group is replaced by a halogen.
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