PRODUCTION OF WATER-DISPERSED POWDER COATING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method for producing with an easy operation a water- dispersed powder coating material capable of forming a coating film having a low content of a hydrophilic compound therein, long-term durability and high water resistance and moisture resistance. SOLUTION: This method for producing a water-dispersed powder coating material comprises such processes that (1) a coating composition comprising (A) a resin as the main element for film formation and (B) an organic solvent capable of dissolving the resin A is dispersed and mixed while stirring in (C) a hydrophilic organic solvent being a nonsolvent or poor solvent for the resin A but compatible with the organic solvent B to form a minute particle dispersion through phase conversion, (2) the minute particles are separated from the minute particle dispersion obtained in the process 1 and (3) the imperfectly dried minute particles obtained from the process 2 is dispersed in water.