POWDER COATING FOR CAST IRON PIPE

摘要

PROBLEM TO BE SOLVED: To provide a powder coating for iron pipes on the basis of an epoxy resin, which is excellent in fluidity and curing properties at low temperatures and can suppress efficiently the occurrence of pinholes on the inner surface of case iron pipes. SOLUTION: The powder coating comprises a solid epoxy resin (A) obtained by reacting a bisphenol F epoxy resin (a1) which is a polyglycidyl ether of a polycondensAte of phenol and a ketone compound and contains 95 wt.% or more of a binuclear component with a novorak resin (disphenol F) (a2) which is a polycondensate of phenol and a ketone compound and contains 5-15 wt.% of a tri- or higher-nuclear component, and a curing agent (B).