Thermosetting resin composition for powder paint comprising of a (I) polymer consisting of .beta.-methylglycidyl (meth)acrylate, styrene, unsaturated dialkyl ester, alkylacrylate and (II) saturated aliphatic dibasic acid

A thermosetting resin composition for powder paints which comprises

• I. a polymer consisting of (1) 10 to 40% by weight of .beta.-methylglycidyl (meth)acrylate or a mixture thereof with glycidyl (meth)acrylate, (2) 20 to 80% by weight of styrene, (3) 3 to 40% by weight of a dialkyl ester of an aliphatic unsaturated dibasic acid wherein each alkyl group contains 1 to 18 carbon atoms and (4) 0 to 30% by weight of an alkyl (meth)acrylate wherein the alkyl group contains 1 to 18 carbon atoms, said polymer being prepared by polymerizing said components (1), (2), (3) and (4) in the above-indicated amounts in the presence of a radical polymerization catalyst, said polymer having a softening point of 80 to 150.degree. C as measured by the ring-and-ball method, and a number average molecular weight of 3,000 to 15,000 as measured by osmometry, and
• Ii. an aliphatic saturated dibasic acid containing 4 to 26 carbon atoms,
• the ratio of the number of glycidyl groups in the polymer [I] to the number of carboxyl groups in the aliphatic saturaed dibasic acid [II] being 1:5 to 5:1, and the weight ratio of styrene to the dialkyl ester of an aliphatic unsaturated dibasic/acid being 1:1 to 10:1.