Process for forming a corrosion resistant coating
AssigneesDai Nippon Tokyo Co., Ltd., Mitsubishi Yuka Fine Chemicals Co., Ltd.
InventorsSadakazu Hokamura, Toshio Shinohara, Mitsutoshi Aritomi, Yuji Yoshida
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Abstract
A process for forming a moisture resistant coating, which comprises: (i) a step of priming a coating composition on a substrate and drying it to form a prime coat, (ii) a step of coating thereon a radical-polymerizable and oxidation-polymerizable, room temperature solventless coating composition containing a scaly pigment and polymerizing it to form a cured intermediate coat, and (iii) a step of finish coating thereon an air-drying finish coating composition and drying it to form an finish coat. '
Claims5
A process for forming a moisture resistant coating film, which comprises:
- (i) priming a coating composition on a substrate and drying it to form a prime coat;
- (ii) coating thereon a radical-polymerizable and oxidation-polymerizable, room temperature solventless coating composition composed essentially of:
- A. from 30 to 90% by weight of a resin component comprising (A) from 30 to 70% by weight of an oil-modified alkyd resin having an oil length of from 30 to 70% and modified with an .alpha.,.beta.-unsaturated monocarboxylic acid selected from the group consisting of sorbic acid, crotonic acid and 2-(.beta.-furyl)acrylic acid, the content of the .alpha.,.beta.-unsaturated monocarboxylic acid in the alkyd resin being from 0.5 to 30% by weight, and (B) from 70 to 30% by weight of a polymerizable monomer in which the ingredient (A) is dissolved,
- B. from 70 to 10% by weight of a scaly pigment, and
- C. an effective amount of a curing catalyst, and polymerizing it to form a cured intermediate coat;
- and
- (iii) coating thereon an air-drying finish coating composition and drying it to form a finish coat.
Dependencies are inferred from the claim text.