US 4,962,148 AGranted

Thermoplastic resin composition and method for preparing the same

AssigneesNippon Petrochemicals Company, Limited, Nippon Oil and Fats Co., Ltd.

InventorsYuichi Orikasa, Suehiro Sakazume, Sadahiro Nishimura, Yoshinori Maki

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Abstract

There is here provided a thermoplastic resin composition containing (I) 99 to 1% by weight of a polypropylene, (II) 1 to 99% by weight of at least one kind of resin selected from the group consisting of an aromatic polyester resin, a polycarbonate resin, a polyamide resin, a polyphenylene ether resin or a mixture of the polyphenylene ether resin and a styrene polymer and an ABS resin, and (III) 0.1 to 100 parts by weight, based on 100 parts by weight of the aforesaid resins (I)+(II), of a multi-phase structure thermoplastic resin which is composed of 5 to 95% by weight of a polyolefin and 95 to 5% by weight of a vinyl polymer or copolymer obtained from at least one kind of vinyl monomer, either of both the components being in the state of a dispersion phase having a particle diameter of 0.001 to 10 .mu.m. A method for preparing the above-mentioned thermoplastic resin composition is also provided here.

Claims21

Dependent claims

A thermoplastic resin composition consisting essentially of:

(I) 99 to 1% by weight of a polypropylene,
(II) 1 to 99% by weight of at least one resin selected from the group consisting of an aromatic polyester resin, a polycarbonate resin, a polyamide resin, a polyphenylene ether resin, a mixture of the polyphenylene ether resin and a styrene polymer, and an ABS resin, and
(III) 0.1 to 100 parts by weight, based on 100 parts by weight of the aforesaid resins (I)+(II), of a multi-phase structure thermoplastic resin which is composed of 5 to 95% by weight of a polyolefin or olefin copolymer and 95 to 5% by weight of a vinyl polymer or copolymer obtained from at least one vinyl monomer, wherein said multi-phase structure thermoplastic resin is a graft polymerization precursor obtained by copolymerizing at least one vinyl monomer and at least one radical polymerizable or copolymerizable organic peroxide in particles of the polyolefin or olefin copolymer, or a multi-phase structure resin obtained by melting and kneading the graft polymerization precursor, and wherein at least one of the components of the multi-phase structure thermoplastic resin is present in a dispersion phase having a particle diameter of 0.001 to 10 .mu.m.

A method for preparing a thermoplastic resin composition which comprises the step of melting and mixing a polypropylene (I) and at least one resin (II) selected from the group consisting of an aromatic polyester resin, a polycarbonate resin, a polyamide resin, a polyphenylene ether resin or a mixture of the polyphenylene ether resin and a styrene polymer and an ABS resin, with

1 to 100% by weight of a graft polymerization precursor (A) which is obtained by mixing at least one vinyl monomer, at least one radical polymerizable or copolymerizable organic peroxide, a radical polymerization initiator and an aqueous suspension of a polyolefin, heating the suspension under such conditions that the decomposition of the radical polymerization initiator does not occur substantially, in order to impregnate the polyolefin with the vinyl monomer, the radical polymerizable or copolymerizable organic peroxide and the radical polymerization initiator and raising the temperature of this aqueous suspension, when the degree of the impregnation has reached 50% by weight of the original total weight of the vinyl monomer, peroxide and initiator, in order to copolymerize the vinyl monomer with the radical polymerizable or copolymerizable organic peroxide in the polyolefin,
0to 99% by weight of the polyolefin (B), and
0 to 99% by weight of a vinyl polymer or copolymer (C) obtained by polymerizing at least one kind of vinyl monomer.

Dependencies are inferred from the claim text.