Title:
PROCESS FOR PREPARING POLYESTERS
Document Type and Number:
Japanese Patent JPS5249292
Kind Code:
A
Abstract:
PURPOSE: To prepare polyesters having good transparency and a good color tone, by the use of a specific catalyst in a process for preparing glycol esters of aromatic dicarboxylic acid and the addition of GeO2 as a polycondensation catalyst at a specific reaction stage in the said process.
Inventors:
INADA HIROO
KAWASE SHIYOUJI
KAWASE SHIYOUJI
Application Number:
JP12533575A
Publication Date:
April 20, 1977
Filing Date:
October 20, 1975
Export Citation:
Assignee:
TEIJIN LTD
International Classes:
C08G63/00; B01J23/00; B01J23/14; C07B61/00; C07C67/00; C07C69/76; C07C69/82; C08G63/78; C08G63/82; (IPC1-7): B01J23/14; C07C67/00; C07C69/76; C08G63/22; C08G63/36
Previous Patent: JPS5249291
Next Patent: METHOD OF RECOVERING AND WASHING LIQUID SCINTILLATOR AND ITS DEVICE
Next Patent: METHOD OF RECOVERING AND WASHING LIQUID SCINTILLATOR AND ITS DEVICE