Method of producing powdery coating material

摘要

Disclosed is a method of producing a powdery coating material by using: a curable acrylic resin (A) having a number average molecular weight of from 2,000 to 20,000 and a glass transition temperature of from 30 to 90 DEG C obtained by polymerizing a starting monomer containing from 15 to 50 mol% of an unsaturated compound which contains at least a glycidyl group and/or a methylglycidyl group, and from 20 to 50 mol% of methyl methacrylate; a curing agent (B) capable of being reacted with the glycidyl group or the methylglycidyl group constituting the curable acrylic resin (A); and an alcohol solvent (C) having a boiling point under normal pressure of from 70 to 120 DEG C; said method comprising a kneading step of so kneading the curable acrylic resin (A), the curing agent (B) and the alcohol solvent (C) that at least the curing agent (B) is dissolved in the alcohol solvent (C) at a temperature of not higher than 130 DEG C, and a vapor-removing step of continuously vapor-removing the alcohol solvent (C) under a reduced pressure at a temperature of not higher than 130 DEG C. <IMAGE>