Patent ID: 9145470
Filing Date: 2015-09-29
Classification: C08G,C08K,C08L,Y02P

Abstract:
1. A process of preparing a polyalkylene terephthalate comprising reacting an alkylene diol and a dicarboxy aromatic compound selected from the group consisting of aromatic dicarboxylic acids, aromatic dicarboxylic (C 1 -C 3 )alkyl esters, and combinations thereof, wherein the process comprises: forming a catalyst that consists of the reaction product of tetra(C obtaining ester interchange by combining the catalyst with the alkylene diol and the aromatic dicarboxy compound; and polymerizing the product of ester interchange, in the continued presence of the catalyst, yielding polyalkylene terephthalate; wherein the polyalkylene terephthalate excludes adipic acid groups.