Asahi Kasei Kogyo Kabushiki Kaisha

Shiraishi Central Laboratories Co., Ltd.

Junji Seki

Keishiro Hiraga

Tsuneyuki Katoh

Makoto Suzuki

Koichi Matsumoto

Hajime Nishihara

Itsuho Aishima

Katsuaki Maeda

Ryogo Tsukisaka

Hironori Suezawa

Yonemasa Furusawa

Yuhachi Takahashi

A multi-layer structure polymer (A) comprising (i) 2 to 30% by weight of an alkyl methacrylate unit, (ii) 50 to 80% by weight of an alkyl acrylate unit, (iii) 5 to 20% by weight of an unsaturated nitrile unit and (iv) 5 to 40% by weight of an aromatic vinyl unit, wherein:

Multi-layer structure polymer and resin composition

A thermoplastic acrylic composition comprising an acrylic particulate composite (B), which could be prepared by a sequential multi-stage polymerization method, and a thermoplastic acrylic resin (A); said composition having a characteristic morphology which is revealed under the observation of a transmission type electron microscope on a sliced specimen stained with a 1% ruthenic acid solution. Said composition shows well-balanced properties and has excellent impact resistance, lowered temperature dependency of haze, good transparency and good weatherability.

Thermoplastic acrylic resin composition

An extruded rigid thermoplastic sheet having optically smooth surfaces, characterized as exhibiting a degree of optical distortion (.delta.) of from 0.03 to 0.06, is produced by a process wherein a sheet-form extrudate from an extruder is polished by polishing rolls driven via a continuous driving force transmission.

Extruded rigid thermoplastic sheet having optically smooth surfaces

A composition comprising a thermoplastic resin and an activated mineral filler, said mineral filler consisting of particles of at least one aluminosilicate-type mineral containing alakali metal ions as cations in its crystal structure, the surfaces of said particles being covered monomolecularly with at least one ethylenically unsaturated organic acid, having 10 or less carbon atoms, which is bonded to the metal ions on the surfaces of said particles and retains ethylenic double bonds unreacted. On being mixed under application of heat to cause reaction, this composition gives a molded article excellent in compatibility and physical properties such as stiffness, toughness, ductility, fatigue properties, water resistance, transparency, etc.

Composition comprising a thermoplastic resin and mineral filler

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Tokyo, Japan

Junji Seki