Hitachi Chemical Company, Ltd.

Asahi Denka Kogyo K.k.

Goi Chemical Company, Ltd.

Takayuki Saitoh

Kiyotaka Mashita

Akihiro Kobayashi

Atsushi Fujioka

Fumiaki Kanega

Tohru Haruna

Takashi Takeuchi

Yuji Kobayashi

Tatsuo Itoh

Hiroshi Nishizawa

A macromolecular material composition which comprises a macromolecular material and a modifier which comprises a polyvinyl cyclohexane compound having hydroindane structure. The modifier improves melt flow characteristics, flexibility at a low temperature, and mechanical characteristics, such as bending modulus and bending strength, of the material, and do not bleed or give bad smell.

Macromolecular material composition and a modifier for macromolecular

A method for preparing a trimer of .alpha.-methyl styrene or derivatives thereof, wherein .alpha.-methyl styrene or derivatives thereof is added to an organic solvent comprising Lewis acid is provided. According to the method, the trimer of .alpha.-methyl styrene or derivatives thereof can be obtained in high yield.

Method for preparing trimer of .alpha.-methyl styrene or derivatives

1-pentene dimers of .alpha.-methylstyrenes are produced with high selectivity in good productivity by stirring 50 to 95 parts by weight of an .alpha.-methylstyrene in the presence of 50 to 5 parts by weight of an aqueous solution of a sulfonic acid, and a 1-pentene dimer having good preservative property is then collected by removing the sulfonic acid, adjusting the resulting reaction solution to pH 8 or higher and distilling the neutralized reaction solution.

Method of preparing unsaturated dimers of .alpha.-methylstyrenes

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Hitachi, Japan

Takayuki Saitoh