A heat-curable resin composition obtained by mixing (A) a polyester resulting from the depolymerization of a polyester of a high degree of polymerization comprising an aromatic dicarboxylic acid and an aliphatic dialcohol using a compound containing about 2 to about 12 carboxyl groups per molecule with (B) a polyoxirane compound containing about 2 to about 100 oxirane groups per molecule. A heat-curable resin composition obtained by adding to the above resin composition a salt formed between an aliphatic monocarboxylic acid containing 2 to 20 carbon atoms and an element of Group II of the Periodic Table as a curing accelerator is an especially superior material for powder paints. Powder paints prepared from these heat-curable resin compositions provide coatings having superior appearance and properties upon baking after coating by a method such as an electrostatic spray coating method or a fluidized dip coating method.
通过混合(A)由含有芳香族二
羧酸和脂肪族二元醇的高聚物聚酯脱聚合而得到的聚酯,使用每个分子含有约2到约12个羧基的化合物和(B)含有约2到约100个环氧基团的聚环氧化合物,获得的热固性
树脂组合物。通过向上述
树脂组合物添加由含有2到20个碳原子的脂肪族单
羧酸和周期表II A族元素形成的盐作为固化催化剂而获得的热固性
树脂组合物,是一种特别优异的粉末涂料材料。从这些热固性
树脂组合物制备的粉末涂料在静电喷涂法或流化浸渍法等方法涂覆后,在烘烤后提供具有优异外观和性能的涂层。