Title:
ポリカーボネート製造時の残留触媒の奪活法
Document Type and Number:
Japanese Patent JP3864052
Kind Code:
B2
Abstract:
Polycarbonate produced by reaction in a melt of a diaryl carbonate and a dihydric phenol in the presence of a basic catalyst is quenched to reduce the level of residual catalyst by combining the polycarbonate with a powder-free quenching composition. The quenching composition contains an acidic quencher, such as an alkyl tosylate, in a non-powder carrier. The non-powder carrier may be a liquid or a solid, for example in the form of pellets containing or coated with the quencher.
Inventors:
Mestan Za Rafael
Application Number:
JP2000606661A
Publication Date:
December 27, 2006
Filing Date:
February 07, 2000
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
C08G64/40; C08G64/42; C08G64/30
Domestic Patent References:
| JP8259687A |
Attorney, Agent or Firm:
Kenichi Matsumoto
Hirokazu Ogura
Nobukazu Ito
Hirokazu Ogura
Nobukazu Ito