PROCESS FOR PRODUCING POLYCARBONATE PREPOLYMER GRANULES FOR SOLID-STATE POLYMERIZATION

Title:

PROCESS FOR PRODUCING POLYCARBONATE PREPOLYMER GRANULES FOR SOLID-STATE POLYMERIZATION

Document Type and Number:

WIPO Patent Application WO/1997/008227

Kind Code:

A1

Abstract:

A process for producing polycarbonate prepolymer granules for solid-state polymerization characterized by dissolving a polycarbonate prepolymer in a solvent under heating, followed by cooling for effecting crystallization, and granulation. This process suppresses the fusion of prepolymer granules among themselves in the polymerization step and expedites the polymerization.

Inventors:

MOTEGI HIROAKI (JP)
KUNISHI NORIYUKI (JP)
SHISHIKURA AKIHIRO (JP)

Application Number:

PCT/JP1996/002046

Publication Date:

March 06, 1997

Filing Date:

July 22, 1996

Export Citation:

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Assignee:

IDEMITSU PETROCHEMICAL CO (JP)
MOTEGI HIROAKI (JP)
KUNISHI NORIYUKI (JP)
SHISHIKURA AKIHIRO (JP)

International Classes:

B29B9/12; C08G64/20; C08J3/12; C08J3/14; (IPC1-7): C08J3/14; C08G64/20

Foreign References:

JPH03223330A

1991-10-02

Other References: