公开(公告)号：US3705133A

公开(公告)日：1972-12-05

申请号：US3705133D

申请日：1969-08-21

Applicant: ALLIED CHEM

Inventor： LAZARUS STANLEY D ,  CHRISTENSEN PAUL N

IPC: C08G63/86 ,  C08G17/015

CPC classification number: C08G63/866

Abstract: A PROCESS FOR THE PREPARATION OF COLORLESS, LINEAR HIGH MOLECULAR WEIGHT FILM AND FIBER-FORMING POLYALKYLENE TEREPHTHALATES EITHER BY DIRECT ESTERIFICATION OR ESTERINTERCHANGE OF TEREPHTHALIC ACID AND/OR THE LOWER ALKYL ESTERS THEREOF WITH A GLYCOL HAVING 2 TO 10 CARBON ATOMS PER MOLECULE TO OBTAIN THE CORRESPONDING DIGLYCOL-ESTER INTERMEDIATE AND THEN CONDENSING SAID INTERMEDIATE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A LEAST ONE TRIVALENT ANTIMONY SALT OF A HIGHER ALIPHATIC MONOCARBOXYLIC ACID HAVING AT LEAST 12 CARBON ATOMS PER MOLECULE.