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Title:
PROCESS FOR CONTINUOUSLY PRODUCING &epsiv −CAPROLACTONE POLYMER
Document Type and Number:
WIPO Patent Application WO/2003/057757
Kind Code:
A1
Abstract:
A process for the continuous production of an &epsiv −caprolactone polymer which comprises heating an &epsiv −caprolactone polymer under vacuum or in an inert gas stream to volatilize the unreacted &epsiv −caprolactone from the polymer and cooling the vapor phase containing the matter which has been volatilized to thereby recover the unreacted &epsiv −caprolactone, characterized in that the amount of the &epsiv −caprolactone to be recovered is regulated to larger than 5 times by weight the amount of caprolactone dimer.

Inventors:
WATANABE JUN (JP)
YOSHIDA SHIGEYUKI (JP)
Application Number:
PCT/JP2002/011381
Publication Date:
July 17, 2003
Filing Date:
October 31, 2002
Export Citation:
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Assignee:
DAICEL CHEM (JP)
WATANABE JUN (JP)
YOSHIDA SHIGEYUKI (JP)
International Classes:
B01D1/00; B01J3/00; C08G63/08; C08G63/78; C08G63/88; C08G63/90; (IPC1-7): C08G63/78
Foreign References:
US5889127A1999-03-30
Other References:
See also references of EP 1469025A4
Attorney, Agent or Firm:
Miura, Yoshikazu (Kojimachi 5-chome Chiyoda-ku, Tokyo, JP)
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