Title:
PRODUCTION OF POLYOXYTETRAMETHYLENE GLYCOL DIESTER
Document Type and Number:
Japanese Patent JPH0616805
Kind Code:
A
Abstract:
PURPOSE: To develop a method of producing a polyoxytetramethylene glycol diester from tetrahydrofuran which diester has a lighter hue and a narrower mol.wt. distribution than those of the conventional ones.
CONSTITUTION: Tetrahydrofuran(THF) is polymerized in the presence of a carboxylic anhydride and a montmorillonite-group mineral which has undergone ion exchange with a polyvalent cation. This method enables a polyoxytetramethylene glycol diester to be produced from THF in high yield which diester has a lighter hue and a narrower mol.wt. distribution than those of the conventional ones.
Inventors:
YOKOTA SHIGERU
Application Number:
JP17243392A
Publication Date:
January 25, 1994
Filing Date:
June 30, 1992
Export Citation:
Assignee:
DAICEL CHEM
International Classes:
C08G65/20; C08G65/02; C08G65/26; (IPC1-7): C08G65/20
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