Mitsubishi Rayon Company, Limited

Suehiro Tayama

Hiroki Hatakeyama

Naoki Yamamoto

Akira Yanagase

Yukio Kitaike

Kazuhiko Nakagawa

Kiyotaka Azegami

Hiroyuki Ikeda

Yasunori Kawachi

Misao Tamura

Akihiro Toritani

Tsukasa Mizobuchi

Masahiro Saruta

Fumio Sato

Norihisa Kusakawa

Tetuya Sawano

Satoshi Kurokawa

Michitoshi Shinka

Disclosed is a technology for providing a thermoplastic resin composition or resin laminate having an excellent mat property by using, as matting agent, a copolymer (B) prepared by polymerizing 0.5 to 80% by weight of a hydroxyalkyl (meth)acrylate having a C.sub.1-8 alkyl group and 10 to 99% by weight of an alkyl methacrylate having a C.sub.1-13 alkyl group, with a C.sub.1-8 alkyl acrylate, vinyl aromatic monomer, another vinyl monomer, and a cross-linking monomer being optional.

Mat thermoplastic resin composition and laminate therefrom, matting

Disclosed is a coating composition comprising (A) 5 to 60 parts by weight, on a solid basis, of colloidal silica, (B) 5 to 70 parts by weight of a hydrolyzate and/or hydrolyzed and partially condensed product of a compound of the general formula ##STR1## (C) 10 to 80 parts by weight of a polyfunctional monomer containing a monomer of the general formula ##STR2## and (D) 0.01 to 5 parts by weight of a photopolymerization initiator containing a compound of the general formula ##STR3## provided that the combined amount of components (A), (B), (C) and (D) is 100 parts by weight. This coating composition can be cured in air by exposure to ultraviolet light, and the resulting cured film is excellent in various properties (such as abrasion resistance) and adhesion to the substrate.

Process for producing abrasion-resistant synthetic resin molded articles

Disclosed is a coating composition comprising

Coating composition and process for producing abrasion-resistant

Disclosed is a methacrylic resin cast plate which is comprised of 100 parts by weight of [I] polymethyl methacrylate or a methyl methacrylate copolymer containing at least 90% by weight of methyl methacrylate units and, dispersed therein, a graft copolymer [IV] obtained by graft-polymerizing a hard resin component [III] containing at least 90% by weight of methyl methacrylate units onto a crosslinked rubbery copolymer [II] containing at least 45% by weight of butyl acrylate units and having an average particle diameter of 0.1 to 1 .mu.m, the amount of the graft copolymer [IV] being 2 to 30 parts by weight as the amount of the crosslinked rubbery copolymer. The methacrylic resin cast plate has a high transparency and impact resistance.

Methacrylic resin cast plate having transparency and impact resistance,

Disclosed is a methacrylic resin cast plate which is comprised of 100 parts by weight of [I] polymethyl methacrylate or a methyl methacrylate copolymer containing at least 90% by weight of methyl methacrylate units and, dispersed therein, a graft copolymer [IV] obtained by graft-polymerizing a hard resin component [III] containing at least 90% by weight of methyl methacrylate units onto a crosslinked rubbery copolymer [II] containing at least 45% by weight of butyl acrylate units and having an average particle diameter of 0.1 to 1 .mu.m, the amount of the graft copolymer [IV] being 2 to 30 parts by weight as the amount of the crosslinked rubbery copolymer.

Methacrylic resin cast plate having transparency and impact resistance

A monomer comprising methyl methacrylate either alone or in combination with another acrylic or methacrylic ester monomer is partially polymerized to prepare a syrup, to which an initiator including a peroxide having a 10-hour half-life temperature of 50.degree. to 58.degree. C. and 2,2'-azobisisobutyronitrile are added. The resulting syrup, after being poured into a mold, is initially polymerized in a first step at a temperature of 75.degree. to 90.degree. C. for a period of 5 to 15 minutes, then further polymerized in a second step at a temperature 3.degree. to 12.degree. C. lower than the temperature of the first step polymerization until a conversion of monomer to polymer of 80 to 95% is attained. The polymerization product which is now in the form of a sheet is then heat-treated at a temperature of 95.degree. to 140.degree. C. to obtain a methacrylic resin sheet. According to this process, methacrylic resin sheets having little residual monomer and being substantially free of defects can be manufactured with high productivity.

Process for the production of methacrylic resin sheets

A methacrylic resin cast plate having an excellent antistatic property comprises (A) 100 weight parts of a polymer comprising 50 to 100 weight % of methyl methacrylate units and 0 to 50 weight % of copolymerizable monomer units and (B) 0.1 to 20 weight parts of a polymer comprising 20 to 100 weight & of units derived from a monomer having a quaternary ammonium base, which is represented by the formula (I): ##STR1## wherein R.sub.1 is H or CH.sub.3, R.sub.2 through R.sub.4 are H or (C1-9) alkyl which may have a substituent, m is from 1 to 10 and X.sup.- is an anion of a quaternizing agent, and 0 to 80 weight % of copolymerizable monomer units. The cast plate is obtained by polymerizing methyl methacrylate, a monomer mixture comprising at least 50 weight & of methyl methacrylate and up to 50 weight % of a copolymerizable monomer or a partial polymerization product thereof in the presence of the polymer (B).

Process for the preparation of a methacrylic resin cast plate having

A methacrylic resin cast plate having an excellent antistatic property comprises (A) 100 weight parts of a polymer comprising 50 to 100 weight % of methyl methacrylate units and 0 to 50 weight % of copolymerizable monomer units and (B) 0.1 to 20 weight parts of a polymer comprising 20 to 100 weight % of units derived from a monomer having a quaternary ammonium base, which is represented by the formula (I): ##STR1## wherein R.sub.1 is H or CH.sub.3, R.sub.2 through R.sub.4 are H or (Cl-9)alkyl which may have a substituent, m is from 1 to 10 and X.sup.- is an anion of a quaternizing agent, and 0 to 80 weight % of copolymerizable monomer units. The cast plate is obtained by polymerizing methyl methacrylate, a monomer mixture comprising at least 50 weight % of methyl methacrylate and up to 50 weight % of a copolymerizable monomer or a partial polymerization product thereof in the presence of the polymer (B).

Methacrylic resin cast plate having excellent antistatic property

A synthetic resin molded article having good antistatic properties is disclosed, which is composed of a body of a synthetic resin (B) having a surface layer which is predominantly comprised of an antistatic polymer (A) and is integral with the body (B). The antistatic polymer (A) mainly composed of units of a quaternary ammonium base monomer of the formula: ##STR1##

Synthetic resin molded article having antistatic property

A process for preparing a thermoplastic resin, which comprises polymerizing a monomer mixture containing at least 80% by weight of at least one member selected from the group consisting of an alkyl methacrylate, an alkyl acrylate, an aromatic vinyl compound, acrylonitrile, methacrylonitrile and butadiene by using as an emulsifier a compound having a group of the formula --PO.sub.3 M.sub.2 or --PO.sub.2 M wherein M is an alkali metal or an alkaline earth metal, to form a latex, and contacting the latex with an aqueous magnesium sulfate solution having a concentration of from 0.1 to 30% by weight.

Process for preparing a thermoplastic resin

Disclosed is a composition suitable for the preparation of a gasket for use in the production of shaped resin articles by cast polymerization. The composition is comprises (A) 100 weight parts of a vinyl chloride resin, (B) 30 to 70 weight parts of a carboxylic acid ester or phosphoric acid ester plasticizer, (C) 0.5 to 10 weight parts of an epoxy type plasticizer and (D) 0.1 to 5 weight parts of a barium- or zinc-containing stabilizer.

Gasket composition for cast polymerization

A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of .alpha.-methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.

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Otake, Japan

Suehiro Tayama