BIOMASS-RESOURCE-DERIVED POLYESTER AND PRODUCTION PROCESS THEREOF

摘要

Provided is a biomass-resource-derived polyester, comprising as a main repeating unit thereof a dicarboxylic acid unit and a diol unit, wherein at least one of the dicarboxylic acid and diol used as raw materials of the polyester is obtained from biomass resources, a nitrogen atom content in the polyester except nitrogen atoms contained in covalently bonded functional groups in the molecule of the polyester is 0.01 ppm to 50 ppm, wherein an amount of terminal acid in the polyester is 50 equivalents/metric ton or less, and wherein a metal amount of a polymerization catalyst selected from the group consisting of titanium, zirconium, tin, antimony, cerium, germanium, zinc, cobalt, manganese, iron, aluminum, magnesium, calcium, strontium, sodium and potassium in the polyester, is 5 ppm to 130 ppm.