Toagosei Chemical Industry, Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Olympus Optical Company, Ltd.

Nippon Petrochemicals Company, Limited

Toagosei Company, Ltd.

Toyota Technological Institute

Shiro Kojima

Kishiro Azuma

Yoshio Mori

Hiroyuki Kato

Takashi Tsuda

Hitoshi Watanabe

Tsutomu Ito

Kazuyuki Kuwano

Toshiyuki Kanno

Mitsuru Nagasawa

Katsufumi Suga

Mamoru Sugiura

Toshiro Miki

Hiroshi Hibino

Takeshi Kawakami

Yuichi Murakami

Hiroaki Yoshitomi

Hiroshi Niizuma

Yoshihiro Yoshinaga

Yasutaro Yasuda

Makoto Watanabe

An aqueous resin composition for coating a metal, which can form a coating film having excellent water resistance and also having high hardness and excellent workability even after being subjected to a pressurized steam treatment is provided. The aqueous resin composition comprises (A) an aqueous copolymer obtained by neutralizing with a base carboxyl groups in a copolymer which is obtained by copolymerizing (a) a macromonomer which is a copolymer of N-alkoxymethyl (meth)acrylamide monomer units and other .alpha.,.beta.-ethylenically unsaturated monomer units, having a radically polymerizable group at one end thereof, (b) .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) hydroxyalkyl (meth)acrylate, and (d) other .alpha.,.beta.-ethylenically unsaturated monomers, in specific proportions, and (B) an amino resin.

Aqueous resin composition for coating metal, and radically polymerizable

A process for producing a polymer of excellent weatherability, which comprises reacting a polymer having a thioether bond, with a peroxide to oxidize the sulfur atom in the bond to convert it into a sulfone.

Weather-resistant solvent-based coating obtained by polymerization with

An aqueous coating composition constitutes an aqueous graft copolymer and an amino resin, the graft copolymer being obtained by neutralizing, with a base, the carboxyl groups of a copolymer which is obtained by copolymerizing the following components (a), (b), (c) and (d) and which contains 3-30% of component (a), 3-20% of component (b), 5-40% of component (c) and 10-89% of component (d):

Aqueous coating composition

An ethylene graft copolymer is disclosed, which is obtained by radical polymerizing a monomer composition comprising (A) from 50 to 99.95% by weight of ethylene, (B) from 0.05 to 50% by weight of a macromonomer having a number average molecular weight of from 2,000 to 20,000 and having a (meth)acryloyl group only at one terminal of the molecular chain thereof, and (C) 0 to 49.95% by weight of other radical polymerizable monomer(s). The ethylene graft copolymer is a modifier for improving impact resistance of engineering plastics or a compatibilizer for engineering plastics to provide a molding resin composition excellent in impact resistance and oil resistance. The ethylene graft copolymer is also useful as a hot-melt adhesive or a pressure-sensitive adhesive.

Ethylene graft copolymer and molding resin composition containing the

A process for producing a macromolecular monomer, which comprises anionic polymerization of a (meth)acrylic acid ester monomer by using, as a polymerization initiator, a compound represented by the following general formula [I]: ##STR1## wherein M.sup.+ is a quaternary ammonium ion; .phi.is a phenylene group; R.sub.1 and R.sub.2 are each an electron withdrawing group stabilizing the carbanion C.sup.-, or one of them is said electron withdrawing group and the other is an alkyl group of 1-6 carbon atoms or a phenyl group; and n is an integer of 0-6.

Process for producing macromolecular monomer

A magnetic recording medium having a modified surface, consisting essentially of (a) a substrate, (b) a ferromagnetic metal thin film formed on one side of the substrate by a vacuum deposition method, an ion plating method, a sputtering method or a plating method and (c) a lubricating coating layer formed on the thin film or on the back of the substrate or on both of them. The recording medium has an improved running stability, durability and corrosion resistance.

Magnetic recording medium having a lubricating coating layer

A process for producing acrylic acid or methacrylic acid by reacting acetic acid or propionic acid with formaldehyde in a gas phase is described, characterized by carrying out the reaction in the presence of a solid catalyst containing at least one of boron oxide or phosphorus oxide and having an acid site of an acid strength, pKa.ltoreq.-3.0. The solid catalyst is of high activity and is satisfactory in both selectivity and conversion and, furthermore, its high selectivity can be maintained for long periods of time. Thus the desired product, acrylic acid or methacrylic acid, can be produced in high yield.

Process for the production of acrylic acid or methacrylic acid

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Tokai, Japan

Shiro Kojima