Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2005-07-26
2005-07-26
Szekely, Peter (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S140000, C524S147000, C524S306000, C524S311000, C524S312000, C524S313000, C524S314000, C524S315000, C524S318000, C524S321000, C524S322000, C525S351000
Reexamination Certificate
active
06921784
ABSTRACT:
A polycarbonate resin molding material containing (A) 100 parts by weight of a polycarbonate resin and 0.001 to 1.0 part by weight of a mold release agent (B) which is composed of a fatty acid ester and a phosphorus-containing heat stabilizer and contains 0.0001 to 50 parts by weight, per 100 parts by weight of the fatty acid ester (b1), of the phosphorus-containing heat stabilizer (b2).The present invention provides a polycarbonate resin molding material excellent in mold releasability and heat resistance during molding, and a molded article therefrom. According to the present invention, particularly, there is provided a polycarbonate resin molding material excellent in mold releasability and thermal stability during molding and suitable for producing a optical disk by incorporating a small amount of a mold release agent and a heat stabilizer.
REFERENCES:
patent: 6001953 (1999-12-01), Davis et al.
patent: 6596198 (2003-07-01), Semen
patent: 61-287954 (1986-12-01), None
patent: 10-60120 (1998-03-01), None
patent: 10-60247 (1998-03-01), None
Dohi Yutaka
Shiomi Masaki
Szekely Peter
Teijin Chemicals Ltd.
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