Resin composition for powder coatings

A resin composition for powder coatings, which comprises, (A) a resin comprising (a) 10 to 90 wt. % of an acrylic resin (A-1) having a viscosity of 100 to 800 poises at 140.degree. C. that is a copolymer obtained by polymerizing 10 to 50 wt. % of a monomer component (a-1) represented by the formula (I): ##STR3## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a lower alkyl group, with 90 to 50 wt. % of another monomer component (a-2) comprising one or more monomers copolymerizable with said monomer component (a-1) and (b) 90 to 10 wt. % of an acrylic resin (A-2) having a viscosity of 1,000 to 5,000 poises at 140.degree. C. that is a copolymer obtained by polymerizing 10 to 50 wt. % of a monomer component (a-1) represented by the formula (I) given above and 90 to 50 wt. % of monomer component (a-2) comprising one or more monomers copolymerizable with said monomer component (a-1) and (B) a polybasic acid compound obtained by reacting a polybasic acid and a polyhydric alcohol and having a viscosity of 100 to 2,000 poises at 140.degree. C. wherein the resin and polybasic acid compound are blended so that the equivalent ratio of the glycidyl groups in the acrylic resin (A-1 and A-2) to the acid groups in the polybasic compound (B) is from 1.5 to 0.5.

A method for powder coating a material to be coated, which comprises coating the material with a resin composition for powder coatings comprising, (A) a resin comprising (a) 10 to 90 wt. % of an acrylic resin (A-1) having a viscosity of 100 to 800 poises at 140.degree. C. that is a copolymer obtained by polymerizing 10 to 50 wt. % of a monomer component (a-1) represented by the formula (I): ##STR4## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a lower alkyl group, with 90 to 50 wt. % of another monomer component (a-2) comprising one or more monomers copolymerizable with said monomer component (a-1) and (b) 90 to 10 wt. % of an acrylic resin (A-2) having a viscosity of 1,000 to 5,000 poises at 140.degree. C. that is a copolymer obtained by polymerizing 10 to 50 wt. % of a monomer component (a-1) represented by the formula (I) given above and 90 to 50 wt. % of monomer component (a-2) comprising one or more monomers copolymerizable with said monomer component (a-1) and (B) a polybasic acid compound obtained by reacting a polybasic acid and a polyhydric alcohol and having a viscosity of 100 to 2,000 poises at 140.degree. C. wherein the resin and polybasic acid compound are blended so that the equivalent ratio of the glycidyl groups in the acrylic resin (A-1 and A-2) to the acid groups in the polybasic compound (B) is from 1.5 to 0.5.