C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/3072, 400/50
C09D 179/02 (2006.01) B05D 7/14 (2006.01) C09D 5/44 (2006.01)
Patent
CA 2038477
ABSTRACT OF THE DISCLOSURE Disclosed is a coating composition for precoated metal material excellent in electrodeposition coating perform- ance, possessing high corrosion-resistance and high processing adhesion, and capable of forming a coat film applicable to spot welding. The coating composition for precoated metal material in the present invention comprises, as essential ingredi- ents, a binder resin possessing film-forming capability, a hydrophilic resin for performing electrodeposition coating uniformly, and fine granular silica for enhancing corrosion-resistance, being dissolved or dispersed in organic solvent, is characterized by that the binder resin is such as having a number-average molecular weight of 600 to 100,000 with containing 25 or more mol% of an aromatic hydroxy compound in its constituent monomer, and the hydrophilic resin is a polyamine resin and/or polyimine resin having a number-average molecular weight of 600 to 100,000 with containing 25 or more mol% of an amine compound in its constituent monomer.
Takano Shizuo
Takimoto Masaaki
Usuki Kazuhiko
Yoshida Yuichi
Bereskin & Parr
Nippon Paint Co. Ltd.
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