公开(公告)号：US3781245A

公开(公告)日：1973-12-25

申请号：US3781245D

申请日：1972-03-10

Applicant: KANEBO LTD

Inventor： ITABASHI Y ,  SAITO S ,  SEKI M

IPC: C08G63/82 ,  C08G63/85 ,  C08G17/015

CPC classification number: C08G63/85 ,  C08G63/82

Abstract: POLYALKYLENE TEREPHTHALATES AND POLYESTERS CONSISTING MAINLY OF THE POLYALKYLENE TEREPHTHALATE ARE PRODUCED EASILY AND CHEAPLY BY USING TITANIUM HYDRIDE HAVING A LOW HYDROGENATION DEGREE OR A MIXTURE OF METALLIC TITANIUM AND STOICHIOMETRIC TITANIUM HYDRIDE AS A CATALYST. THE THUS OBTAINED POLYESTERS ARE SUBSTANTIALLY COLORLESS AND HAVE AN EVEN COLOR TONE BETWEEN LOTS.