ALIPHATIC POLYESTER COMPOSITION, MOLDED PRODUCT, AND MANUFACTURING METHOD OF ALIPHATIC POLYESTER
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Mar 28, 2016
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Mar 30, 2015
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Abstract
A method of continuously manufacturing an aliphatic polyester composition from a cyclic ester and the like, wherein the temperature in an extruder is increased in two or more stages from a raw material supply port to a discharge port, the temperature at the discharge port is a temperature where the melt viscosity of the composition at the discharge port is from 100 to 2000 Pa·s, the free acid concentration in the cyclic ester is 10 eq/t or less, and the unreacted cyclic ester concentration in the composition is less than 2 wt. %.
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