Polycarbonate resin

Details Polycarbonate resin Polycarbonate resin

2007-04-10

2007-04-10

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C524S445000, C524S449000, C525S051000, C525S063000, C525S074000

Reexamination Certificate

active

10820808

ABSTRACT:
A polycarbonate resin with a polystyrene-converted weight average molecular weight (Mw) of 20,000 to 200,000 obtained by forming a carbonate bond from a dihydroxy compound represented by the general formula (1), a dihydroxy compound represented by the general formula (2) and bis(hydroxyphenyl) methane and a carbonic acid diester or phosgene, having higher stiffness and better balance of mechanical properties than conventional aromatic polycarbonate resin to be derived from 2,2-bis(4-hydroxyphenyl)propane.

REFERENCES:
patent: 6-184424 (1994-07-01), None
patent: 2002-20610 (2002-01-01), None
“Patent Abstracts of Japan” Abstract of JP No. 10 176046, Jun. 30, 1998, Teijin, Ltd.
Derwent Abstract of JP No. 61 213218, Sep. 22, 1986, Idemitsu Kosan Co., Ltd.

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