METHOD FOR PREPARING A MODIFIED COPOLYESTER

摘要

A method for preparing a modified copolyester includes the steps of: i) subjecting a mono(2-hydroxylalkyl)dicarboxylate to an esterification reaction with an isosorbide to form an intermediate; and ii) subjecting the intermediate to a condensation polymerization in the presence of a condensation polymerization catalyst. The method may enhance the reactivity of isosorbide, reduce the amount of water by-product, and raise the glass transition temperature and the color stability of the copolyester thus obtained.

主权项

1. A method for preparing a modified copolyester, comprising the steps of:
i) subjecting a mono(2-hydroxylalkyl)dicarboxylate represented by formula (A) to an esterification reaction with an isosorbide to form an intermediate, wherein X represents a divalent C2-C10 aliphatic hydrocarbyl group which is unsubstituted or substituted with at least one of a C1-C4 alkyl group and a C2-C4 alkenyl group, and Z represents a divalent hydrocarbyl group; and ii) subjecting the intermediate to a condensation polymerization in the presence of a condensation polymerization catalyst.