Title:
PRODUCTION OF POLYCAPROLACTONE CONTAINING URETHANE BOND
Document Type and Number:
Japanese Patent JPH05279445
Kind Code:
A
Abstract:
PURPOSE:To obtain the subject bio-decomposable polycaprolactone having high toughness and physical properties suitable as films, molded materials, etc., by reacting a specific polycaprolactone with a specific amount of a polyvalent isocyanate in molten state at or above the melting point of the polycaprolactone. CONSTITUTION:The objective polycaprolactone is produced by reacting (A) 100 pts.wt. of a polycaprolactone having a number-average molecular weight of >=5,000 (preferably >=10,000) with (B) 0.1-5 pts.wt. of a polyvalent isocyanate (preferably aliphatic or cycloaliphatic diisocyanate) in an inert gas in molten state at a temperature (150-250 deg.C) above the melting point of the component A.
Inventors:
Eiichiro Takiyama
Takashi Fujimaki
Yoshitaka Hatano
Takashi Fujimaki
Yoshitaka Hatano
Application Number:
JP8102592A
Publication Date:
October 26, 1993
Filing Date:
April 02, 1992
Export Citation:
Assignee:
Showa High Polymer Co., Ltd.
International Classes:
C08G18/42; C08G63/08; C08G63/68; C08G63/685; C08G63/78; C08G63/91; C08L101/16; (IPC1-7): C08G18/42; C08G63/08; C08G63/685; C08G63/91
Attorney, Agent or Firm:
Yaguchi flat
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