Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Minoru Ushioda

Yoshihisa Tawada

Masahiro Kobayashi

Tetsuro Yamamoto

Kenji Ueno

Itaru Hatano

Kazuo Saito

Hiroyasu Furukawa

A particulate vinyl chloride polymer having excellent processability and heat stability which comprises porous vinyl chloride polymer particles and alkyl vinyl polymers which are included in the porous particles. The particulate polymer is prepared by impregnating an alkyl vinyl compound in porous particles of a vinyl chloride polymer, polymerizing it, and in the course of the polymerization of the alkyl vinyl compound, adding an alkyl methacrylate to the polymerization system and continuing the polymerization. Since the thus obtained polymer has an improved melt-flowability and heat stability, it can be blended with a large quantity of an inorganic filler and can be molded with good processability.

Porous particulate polyvinyl chloride impregnated with alkyl vinyl and

A particulate vinyl chloride polymer having excellent processability and heat stability which comprises porous vinyl chloride polymer particles and acrylic polymers which are included in the above porous particles. The particulate polymer is prepared by impregnating an alkyl acrylate in porous particles of a vinyl chloride polymer, polymerizing it, and in the course of the polymerization of the alkyl acrylate, adding an alkyl methacrylate to the polymerization system and continuing the polymerization. Since the thus obtained polymer has an improved melt-flowability and heat stability, it can be blended with a large quantity of an inorganic filler and can be molded with good processability.

Polyvinyl chloride containing alkyl acrylate and alkyl methacrylate

Composition and method of manufacturing same, wherein a vinyl chloride resin has talc therein in direct contact with vinyl chloride based polymer particles without any intervening material therebetween.

Vinyl chloride resin talc-embedded composition and method of

A composite material comprising polyvinyl chloride, talc and a polyamide and/or amide compound is disclosed. The talc used is comprised of 85% or more by weight of particles having a diameter of 10 microns or less. The polyamide used has a softening point of less than 200.degree. C. The amide compound used is in preference alkylene bis-amide or methylolated aliphatic amide. The composite material contains up to 30 parts by weight of the polyamide or the amide compound per 100 parts by weight of the talc used. The disclosed polyvinyl chloride composite material has an improved impact strength and improved thermal stability.

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Amagasaki, Japan

Minoru Ushioda