Nippon Oil Company

Nippon Oil Corporation

Yoshihiro Gohshi

Seizo Kobayashi

Saburo Matsubara

Katsumi Usui

Toshio Okada

Tamiko Suga

The present invention provides a method for producing &#x3b1;-olefin polymer, comprising polymerizing &#x3b1;-olefins in the presence of a halogen atom-containing acid catalyst by use of an aliphatic hydrocarbon having 3-12 carbon atoms, which contains 5 to 95 mass % of &#x3b1;-olefin, as a raw material; removing catalyst residue and halogen-containing compounds by bringing a product in the polymerization step into contact with an aluminum atom-containing inorganic solid treatment agent with or without deactivating the catalyst; and separating the &#x3b1;-olefin polymer. According to this method, the catalyst residue and other halogen-containing compounds can be removed, without relying on aqueous deactivation and separation steps using an alkaline aqueous solution or the like, from a polymerization reaction product obtained by polymerization in the presence of a halogen-containing acid catalyst by use of an &#x3b1;-olefin-containing liquid hydrocarbon as a raw material.

Method for producing &#x3b1;-olefin polymer

A method for the preparation of masterbatch compositions for use in thermoplastic resin modification by blending polybutene with an ethylene..alpha.-olefin copolymer which is obtained by copolymerizing ethylene and .alpha.-olefin in the presence of specific catalysts and has specific characteristics such as a density of exceeding 0.910 g/cm.sup.3 and 0.940 g/cm.sup.3 or less, and successively by kneading and extruding the blend in the temperature range from the maximum peak temperature (Tm) to (Tm-45.degree. C.) in accordance with differential scanning calorimetry (DSC).

Preparation method of masterbatch composition for thermoplastic resin

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Yokosuka, Japan

Yoshihiro Gohshi