公开(公告)号：US5270391A

公开(公告)日：1993-12-14

申请号：US976506

申请日：1992-11-13

申请人： Eiichiro Miyazaki ,  Makoto Nishimori ,  Taisaku Kano ,  Takayoshi Sekido ,  Masashi Seki

发明人： Eiichiro Miyazaki ,  Makoto Nishimori ,  Taisaku Kano ,  Takayoshi Sekido ,  Masashi Seki

IPC分类号： C08K5/092 ,  C08L33/06 ,  C09D5/46 ,  C09D133/06 ,  C09D137/00 ,  C08L37/00

CPC分类号： C09D133/068 ,  C08K5/092 ,  C09D137/00 ,  C08L2205/02 ,  C08L33/068 ,  Y10T428/31511

摘要： 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.