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AssigneeMitsui Toatsu Chemicals, Inc.
InventorsEiichiro Miyazaki, Makoto Nishimori, Taisaku Kano, Takayoshi Sekido, Masashi Seki
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A composition for thermosetting powder coating, which comprises (a) an acrylic copolymer of high softening point having an epoxy equivalent of 250-1,000 g/eq and a softening point of 90.degree.-160.degree. C., (b) an acrylic copolymer of low softening point having an epoxy equivalent of 200-600 g/eq and a softening point of 30.degree.-70.degree. C., (c) a polycarboxylic acid, and (d) optionally, a phosphoric acid ester compound and/or a phosphorous acid ester compound, and wherein the difference in softening point between (a) and (b) is 60.degree.-120.degree. C., the weight ratio of (a)/(b) is 95/5 to 60/40, and the equivalent ratio of [the total epoxy groups of (a) and (b)] : [the acid group of (c)] is 0.5:1 to 1:0.5. Said composition has excellent storage stability and, when used as a coating for automobiles, gives a film superior in appearance, solvent resistance and acid resistance.
A composition for thermosetting powder coating, which comprises
Dependencies are inferred from the claim text.