Mitsubishi Gas Chemical Company, Inc.

Yoshinori Iwamoto

Naomitsu Takashina

Masahiro Shimoi

Senzo Shimizu

Keiun Ko

Masuya Ikegami

An ambient temperature curing, two-package type coating composition consists essentially of a solution of (1) components reactive with each other to form a film upon curing at ambient temperature and (2) a solvent; said film-forming components (1) being (a) copolymer having pendant epoxy groups prepared by copolymerization of 2 to 60% by weight, on the basis of total monomer, of glycidyl acrylate or methacrylate or allylglycidyl ether with at least one other polymerizable monomer, and (b) 0.1 to 3.0 equivalents of at least one of acid phosphate esters or acid phosphite esters, and said solvent (2) being (c) at least 5% by weight, on the basis of the solvent (2), of an alcoholic solvent, and (d) at least one other organic solvent. The coating composition has a good pot life when mixed into an ultimate single mixture, and the resulting coating film has a good resistance to water.

Coating composition

This invention relates to a one-package system cold-setting type coating composition which comprises an acrylic copolymer having carboxyl groups in its molecule or an alkyd resin, an aluminum alkoxide complex, a keto-enol tautomeric compound, a solvent and at least one alkali metal hydroxide.

One package system cold-setting type coating compositions

An ambient temperature curing coating composition having a good resistance to solvent and a good corrosion resistance is provided, and said composition comprises copolymers having pendant epoxy groups prepared by copolymerization of glycidyl acrylate or methacrylate or allyl glycidyl ether with at least one of other polymerizable monomers, 0.1 to 2 moles of phosphoric acid per one equivalent of the epoxy groups of the copolymers, and an organic solvent containing at least 5% by weight of an alcoholic solvent.

This invention relates to a one package system cold-setting type coating composition which comprises an acrylic copolymer having carboxyl groups in its molecule or an alkyd resin, an aluminum alkoxide complex and a keto-enol tautomeric compound, characterized by adding a specific nitrogen compound to the composition for preventing discoloration of a coated substance.

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Odawara, Japan

Yoshinori Iwamoto