Title:
SUPPRESSION OF POLYMERIZATION OF CYCLIC POLYCARBONATE OLIGOMER TO LINEAR POLYCARBONATE
Document Type and Number:
Japanese Patent JPH01151574
Kind Code:
A
Abstract:
Substituted phenols and phenyl carbonates derived therefrom, such as 2,4-dinitrophenol and 2,4-dinitrophenyl carbonate, are employed to inhibit the formation of linear polycarbonates from cyclic polycarbonate oligomers. Inhibition of polymerization initiated by impurities in the cyclics is noted. When polymerization is effected by basic polycarbonate formation catalysts, the phenols or phenyl carbonates decrease reaction rate.
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Inventors:
TOMASU REEN EBANZU
KARORU BAABARA BAAMAN
KARORU BAABARA BAAMAN
Application Number:
JP20204588A
Publication Date:
June 14, 1989
Filing Date:
August 15, 1988
Export Citation:
Assignee:
GEN ELECTRIC
International Classes:
B01J31/02; B01J31/12; C07B61/00; C08G64/20; C08G64/30; C08K5/00; C08K5/109; C07D323/00; C08K5/13; C08L69/00; (IPC1-7): B01J31/02; B01J31/12; C07B61/00; C07D323/00; C08G63/62; C08K5/13; C08L69/00
Attorney, Agent or Firm:
Tokunji Ikunuma