Method of protecting an organic resin-based coating film and the organic resin coating film for coating agent

摘要

PROBLEM TO BE SOLVED: To provide a method of maintaining a barrier property to a coating film of a lower layer without generating a crack against a temperature change in forming a coating containing clay mineral as a major component on a coated surface, as an object, formed of organic resin paint which is colored by pigment.SOLUTION: In a protecting method of an organic resin coating film, a protection film is formed by coating a coating agent on a coating film, as an object, formed of organic resin paint which is used outdoor and is colored with pigment, and then drying and curing the coating agent. As the coating agent, an aqueous solution containing layered clay mineral, of which a medium diameter of a particle size is 18,120 nm, as a major component is used, wherein a length in a direction orthogonal to a thickness direction of a primary particle is the particle size.