Aqueous coating composition for cans

Details Aqueous coating composition for cans Aqueous coating composition for cans

C - Chemistry, Metallurgy

09

D

117/193, 400/544

C09D 161/20 (2006.01) C09D 133/06 (2006.01) C09D 167/00 (2006.01) C08L 61/20 (2006.01)

Patent

CA 2003227

ABSTRACT OF THE DISCLOSURE An aqueous coating composition for cans which forms a coating having high hardness and a smaller organic solvent content and generates a smaller amount of fumes in a high temperature baking, and which comprises, as a resin component, (A) an alkyl-etherified amino resin formed by attaching, on average, not less than three, per molecule of spiroguanamine or melamine, formaldehydes to spiroguanamine or a mixture of spiroguanamine with melamine under an addition or condensation reaction, and then alkyl-etherifying the resultant addition or condensation reaction product with methanol, ethanol or a mixture of these, and (B) an aqueous polyester or acrylic resin having a specific acid value and hydroxyl value and being soluble or dispersible in an aqueous medium in the presence of a volatile base.

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