Polycarbonate copolycarbonate resin compositions and preparing m

Details Polycarbonate copolycarbonate resin compositions and preparing m Polycarbonate copolycarbonate resin compositions and preparing m

1995-12-01

1997-07-08

Yoon, Tae

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528171, 528193, 528219, C08G 6364

Patent

active

056462336

ABSTRACT:
A copolycarbonate and a copolycarbonate composition having oustanding hardness and a method for their manufacture.
A copolycarbonate containing the component units shown in Formula [I]below in the amount of 50-99 mole %: ##STR1## X is ##STR2## R1 and R2 are hydrogen atoms or monovalent hydrocarbon groups, and R3 is a bivalent hydrocarbon group.) The Rockwell hardness (M scale) of this polycarbonate should preferably be 45-90.

REFERENCES:
patent: 4533722 (1985-08-01), Campbell et al.
patent: 5025083 (1991-06-01), Ueda et al.

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