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Title:
METHOD FOR PRODUCING BLOCK COPOLYCARBONATE/PHOSPHONATES AND COMPOSITIONS THEREOF
Document Type and Number:
Japanese Patent JP2015120912
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a simple, facile, cost-effective method for producing copolycarbonate/phosphonates that exhibit a favorable combination of physical and mechanical properties.SOLUTION: Compositions consisting of block copolycarbonate/phosphonates, which exhibit an excellent combination of flame resistance, hydrolytic stability, high Tg, low melt viscosity, low color and high toughness, are prepared by a method comprising: a step of obtaining a predominately phenol-terminated oligocarbonate and selectively free bisphenol; and a step of reacting the predominately phenol-terminated oligocarbonate and the selectively free bisphenol with an alkylphosphonic acid diarylester at high temperature, under reduced pressure, and in a melt, to produce a random copolycarbonate/phosphonate.

Inventors:
DIETER FREITAG
Application Number:
JP2014256229A
Publication Date:
July 02, 2015
Filing Date:
December 18, 2014
Export Citation:
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Assignee:
FRX POLYMERS INC
International Classes:
C08G79/04; C08G64/18; C08G64/38; C08L85/02; C08L101/00
Domestic Patent References:
JPS62169821A1987-07-27
JPS5876426A1983-05-09
JP2001270981A2001-10-02
Attorney, Agent or Firm:
Taro Yaguchi