C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 161/20 (2006.01) C09D 163/02 (2006.01) C09D 167/00 (2006.01) C09D 167/02 (2006.01)
Patent
CA 2073999
ABSTRACT A water base coating composition which has excellent shelf stability and can be cured by ordinary baking in the absence of a sulfonic acid-containing acid catalyst and which gives a coating having excellent adhesion and excellent water resistance. The water base coating composition can be obtained by dissolving or dispersing 50 to 80 % by weight, as a solid content, of a water-soluble polyester resin prepared by polycondensing a carboxylic acid component containing 10 to 60 mol% of a polycarboxylic acid having 3 to 4 carboxyl group, per molecule and 40 to 90 mol% of a dicarboxylic acid and 1.1 to 2.0 mol, per mole of the carboxylic acid component, of a glycol component, to obtain a polyester resin having a free carboxyl group, and dissolving the polyester resin in water in the presence of a base, 5 to 20 % by weight, as a solid content, of a water base bisphenol type epoxy resin, and 15 to 45 % by weight, as a solid content, of an alkyl-etherified amino resin, in an aqueous medium.
Kubota Hirosi
Nakamura Masashi
Umezawa Mituo
Smart & Biggar
Toyo Ink Manufacturing Co. Ltd.
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