Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Kanegafuchi Kagaku Kogyo

Fumiya Nagoshi

Shigemi Matsumoto

Tamio Fujita

Hideyuki Arakawa

Shigemi Mathumoto

Sigemi Mathumoto

Eiichi Muramatsu

Masaki Matsuo

Hayashi Uchino

Osamu Kakimoto

Sigemi Matsumoto

Hidetaka Kubota

Mitsuru Echigoya

An .alpha.-methylstyrene high-content copolymer which is characterized by that it is a copolymer which comprises 65-90 parts by weight of .alpha.-methylstyrene with 35-10 parts by weight of acrylonitrile and 0-5 parts by weight of a copolymerizable vinyl monomer or monomers and that a component having an .alpha.-methylstyrene content of 82% or higher is contained in an amount of 30 parts by weight or more. Such a copolymer may be produced by a process which comprises charging 65 parts by weight or more of .alpha.-methylstyrene and 10% by weight or less based on this .alpha.-methylstyrene of acrylonitrile and a vinyl monomer or monomers all in one portion at the initial stage, making the system fully emulsified, gradually adding 35 parts by weight or less of acrylonitrile and the vinyl monomer or monomers, and carrying out emulsion polymerization until the amount of a polymer produced has amounted to 50 parts by weight or more in such way that the ratio of the .alpha.-methylstyrene monomer to the monomers other than .alpha.-methylstyrene in the system is always maintained at 90/10 or higher on the weight basis. A thermoplastic resin composition comprises the above .alpha.-methylstyrene high-content copolymer and a graft copolymer obtained by reacting a diene rubber with monomer comprising a monovinyl aromatic compound and an unsaturated nitrile compound, the diene rubber being present in an amount of 5-30 parts by weight. Molded products obtained from the composition of this invention have excellent heat resistance and impact resistance.

Alpha-methylstyrene high-content copolymers, a process for their

A thermoplastic resin composition having a matte appearance comprising:

Thermoplastic resin composition having a matte appearance

A thermoplastic resin composition comprising (A) 5 to 90 parts of a vinyl chloride polymer, (B) 90 to 50 parts of an ABS resin and (C) 70 to 5 parts of wood flour, the total amount of the component (A), (B) and (C) being 100 parts. The composition has functions and appearance peculiar to wood, excellent moldability and secondary processability and extremely improved heat distortion resistance.

Thermoplastic resin composition containing wood flour

A process for preparing a thermoplastic resin composition capable of giving delustered articles which comprises blending (A) 10 to 30 parts by weight of a graft-copolymer and (B) 90 to 70 parts by weight of a copolymer, the total amount of the components (A) and (B) being 100 parts by weight;

Process for preparing thermoplastic resin composition

A thermoplastic resin composition having toughness, high thermal deformation resistance, and good flowability which comprises a copolymer of .alpha.-methylstyrene and acrylonitrile, and/or vinyl monomer; a copolymer of diene olefin rubber grafted with methacrylic alkyl ester, vinyl aromatic compound, and/or vinyl cyanide; and polycarbonate.

Thermoplastic resin composition having toughness and high thermal

.alpha.-Methylstyrene high-content copolymers, a process for their

Thermoplastic resin compositions which comprise 20-70 parts by weight of a polyvinyl chloride resin and 80-30 parts by weight of a mixed composition of the following copolymers (A) and (B) at the following ratio:

Thermoplastic resin compositions

A thermoplastic resin composition having excellent impact resistance, heat distortion resistance and processability which comprises an aromatic polycarbonate and a thermoplastic resin prepared by polymerizing a monomer mixture containing mainly acrylonitrile and styrene in the presence of a diene rubber, adding .alpha.-methylstyrene or a monomer mixture containing mainly .alpha.-methylstyrene to the system, and continuing the polymerization, while gradually adding acrylonitrile or a monomer mixture containing mainly acrylonitrile.

Thermoplastic resin composition having toughness and high heat

A polyvinyl chloride composition having improved processability, high clarity, and high heat distortion temperature is prepared by blending (I) 99 to 30 parts by weight of polyvinyl chloride or vinyl chloride copolymer having at least 80 weight percent vinyl chloride; and (II) 1 to 70 parts by weight of a polymer which is obtained by polymerizing 1 to 30 weight percent of a mixture (B) comprising 40 to 80 weight percent styrene monomer and 60 to 20 weight percent alkyl ester of acrylic acid or alkyl ester of methacrylic acid, in the presence of 99 to 70 weight percent methyl methacrylate polymer (A) or copolymer (A) having more than 75 weight percent methyl methacrylate and less than 25 weight percent styrene monomer, the polymer (A) or copolymer (A) having a specific viscosity of less than 0.6.

Polyvinyl chloride composition

A thermoplastic resin which is outstanding in impact resistance and heat distortion resistance and is discolored only little by heat is produced by polymerizing, in the presence of diene type synthetic rubber, a monomer mixture of acrylonitrile and styrene, adding thereto a monomer mixture containing more than 80 wt % of .alpha.-methylstyrene, and then adding thereto little by little a monomer mixture containing more than 70 wt % of acrylonitrile, whereby 95-70 parts by weight of monomer is polymerized in the presence of 5-30 parts by weight of the diene type synthetic rubber.

Process for producing thermoplastic resin

A method of producing a polymer or copolymer solution of vinyl chloride series, wherein polymerization of 100 parts by weight of a monomer mixture of at least 50 weight percent of vinyl chloride and less than 50 weight percent of one or more monomers copolymerizable therewith is carried out in a solvent mixture consisting essentially of 30 to 55 weight percent water, remainder N,N-dimethyl formamide, in the presence of 0.5 to 5 parts by weight of a salt of a monomeric compound having a sulphonic acid group and using an initiator for radical polymerization.

Method of producing polymer solutions of polymers or copolymers of vinyl

A modifier for vinylidene chloride resin which is produced by polymerizing 50 to 20 parts by weight of a vinyl monomer mixture comprising 0 to 60 weight percent methyl methacrylate, 0 to 30 weight percent acrylic acid ester and more than 20 weight percent aromatic vinyl monomer, in the presence of 50 to 80 parts by weight of a rubber latex consisting essentially of ethylene-vinyl acetate copolymer containing 50 to 80 weight percent vinyl acetate.

Growing community of inventors

Kobe, Japan

Fumiya Nagoshi