Methacrylic resin composition for optical discs

Details Methacrylic resin composition for optical discs Methacrylic resin composition for optical discs

C - Chemistry, Metallurgy

08

L

400/9298

C08L 33/12 (2006.01) C08K 5/10 (2006.01) C08K 5/101 (2006.01)

Patent

CA 1287941

ABSTRACT A methacrylic resin composition for optical discs comprising 100 parts by weight of a copolymer composed of from 95 to 99.7% by weight of methyl methacrylate (A) and from 0.3 to 5% by weight of at least one monomer (B) selected from the group consisting of methyl acrylate, ethyl acrylate and butyl acrylate, and having a heat distortion temperature of at least 95°C, a melt flow rate of from 1.0 to 10.0 g/10 min and a tensile strength of at least 660 kg/cm2, and from 0.05 to 2.0 parts by weight of at least one releasing agent (C) selected from the group consisting of a fatty acid alkyl ester of the formula R1COOR2 wherein each of R1 and R2 is an alkyl group having from 5 to 20 carbon atoms, cetanol and a stearic acid glycerol ester. :

519675

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