METHOD FOR MANUFACTURING BIOMASS-DERIVED POLYESTER AND BIOMASS-DERIVED POLYESTER

摘要

[Problem] To provide a method of producing a biomass resource-derived polyester capable of greatly reducing fossil resource usage amounts and carbon dioxide increases that is in way inferior in color or thermal stability to a conventional fossil resource-derived product while also having superior dye affinity.

[Solution] The biomass resource-derived dicarboxylic acid and/or ester forming derivative thereof used as the raw material fulfills at least one of the following conditions:
(A) The amount of potassium hydroxide needed to neutralize an acid component extracted using an organic solvent from 1 g of the dicarboxylic acid and/or ester forming derivative thereof is 0.1 mg KOH/g or less
(B) The amount of potassium hydroxide needed to neutralize an acid component extracted using water from 1 g of the dicarboxylic acid and/or ester forming derivative thereof is 0.05 mg KOH/g or less
(C) Sulfuric acid ion content is 40 ppm or less