HIGHLY FLOWABLE POLYESTER RESIN AND METHOD OF PRODUCING THE SAME

• Main Authors: KURATA TAMOTSU, SUZUKI TAKAYUKI, MATSUZONO SHINICHIRO
• Format: Patent
• Language: English
• Published: 29.08.2013
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a method of producing a polyester resin having high flowability while keeping its own mechanical strength properties such as tensile rupture-inducing distortion strength without impairing its own polycondensation reactivity and quality and being slight in fear of thickening (gelation).SOLUTION: A method for producing a polyester (resin) comprises: an esterification step of carrying out an esterification reaction and/or transesterification reaction between a dicarboxylic acid component comprising terephthalic acid or its ester-forming derivative and a diol comprising 1,4-butanediol, and a polycondensation step of carrying out a polycondensation reaction of the resultant oligomer obtained in the esterification step, wherein a fatty acid ester compound composed of the corresponding fatty acid and polyhydric alcohol and/or a polycarboxylic acid ester compound composed of the corresponding polycarboxylic acid and alcohol are incorporated into the reaction system.