Nippon Oil Fats Co., Ltd.

Hiroshi Goto

Nobuyoshi Suzuki

Yasuo Moriya

Resin compositions obtained by causing copolymerization of particular radical (co-and/or) polymerizable organic peroxide and vinyl monomer in particular propylene polymers and that it is a best way to use an aqueous suspension in the manufacture.

Graft polymerization precursor and method of manufacturing the same

Resin compositions obtained by causing copolymerization of particular radical polymerizable organic peroxide and vinyl monomer in an ethylene polymer and that it is a best way to use a water suspension in the manufacture.

Graft polymerization preformer and method of manufacturing the same

Resin compositions obtained by causing copolymerization obtained by causing copolymerization of particular radial (co-and/or) polymerizable organic peroxide and vinyl monomer in particular ethylene (co-and/or) polymers and that it is a best way to use a water suspension in the manufacture.

A graft precursor is formed by preparing a propylene polymer suspension having a propylene polymer suspended in water and a solution having a specific radically (co)polymerizable organic peroxide and a specific radical polymerization initiator dissolved in specific amounts in a vinyl monomer, mixing the propylene suspension and the solution in a specific ratio, heating and stirring the resultant mixture under conditions incapable of inducing substantial decomposition of the polymerization initiator, and further elevating the temperature of the mixture after the total amount of the vinyl monomer, the radically (co)polymerizable organic peroxide, and the radical polymerization initiator has decreased to less than 50% by weight of the initial total amount. Then a graft resin composition is produced by melting and kneading the graft precursor, either by itself or in combination with a propylene polymer and a vinyl polymer, at a temperature in the range of 100.degree. to 300.degree. C. thereby effecting a grafting reaction of the mixture.

Method for production of graft resin composition

A graft polymerization precursor is prepared through polymerization caused by impregnating an ethylene polymer with a vinyl monomer and a radical polymerizable PO, or a mixture of this graft polymerization precursor and an ethylene polymer and vinyl polymer, is kneaded in a molten state at 100.degree. to 300.degree. C. By so doing, a resin composition having a revolutionary high grafting efficiency can be obtained, so that secondary coagulation can be prevented.

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Aichi, Japan

Hiroshi Goto