Asahi Kasei Kogyo Kabushiki Kaisha

Mitsubishi Chemical Corporation

Toshinori Koseki

Kunio Maeda

Michihiro Aboshi

Kimio Imaizumi

Katsumi Yoshitake

Syoichi Kanno

Tsutomu Kakutani

Haruo Kinoshita

The present invention relates to a cushioning composite molded article obtained by forming a cushioning material having a surface material on a rigid substrate integrally, and a process for producing the composite molded article by a simple procedure involving a small number of steps for production, and

Cushioning composite molded article and a process for production thereof

The methacrylic copolymer of the present invention is a novel copolymer having low moisture absorption properties which comprises specific proportions of methyl methacrylate units and tert-butylcyclohexyl methacrylate units, optionally with specific ethylenically unsaturated compound units copolymerizable with the above-mentioned monomer units. The copolymer of the present invention is excellent not only in colorlessness, transparency, moldability, low double refraction and heat stability but also in low moisture absorption properties and heat resistance and, therefore, is suitable for use as a material for shaped articles, such as an optical element substrate and a light transmissible extruded plate, and can particularly advantageously be used for applications, such as an optical disc substrate.

Methacrylic copolymer having low moisture absorption properties

This invention relates to a resin composition comprising an oil retainer, a base thermoplastic resin and an oil. The affinity of the oil retainer and base resin to the oil is defined to result in a resin composition which is excellent in moldability, lubricity and surface appearance.

Resin composition

Thermoplastic resin compositions of improved lubricity and wear resistance are prepared without sacrificing the excellent moldability which is inherent in thermoplastic resins which compositions comprise a base resin, a lubricant and an ethylene-vinyl acetate copolymer.

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Kamakura, Japan

Toshinori Koseki