Patent ID: 9381709
Filing Date: 2016-07-05
CPC Classification: A23L,B29D,C08G,C08L

Claim Text:
1. A process for preparing a polyester polymer product comprising an at least partially cobalt-neutralized organic sulphonic acid component and having an ether content of less than 8 mole %, said process comprising the following steps: a. subjecting at least one dicarboxylic acid or mono-esters, di-esters or anhydrides thereof and at least one diol to esterification in a vessel by heating under pressure to obtain an esterified product; b. adding at least one at least partially cobalt-neutralized organic sulphonic acid to the esterified product to obtain a mixture; c. removing at least partially the diol from the esterified product or said mixture; and d. heating the mixture under reduced pressure to obtain the polyester polymer product comprising the at least one at least partially cobalt-neutralized organic sulphonic acid uniformly dispersed therein.