METHOD AND AGENT FOR PREVENTING COATING FILMS FROM PEELING

摘要

An anti-peeling agent containing a mixture of 1. a substance whose molecule is partly composed by a functional atomic group reactive to the epoxy and the hydroxyl group or both, in film forming molecules, and which forms a chemical bond between two identical or different coating films and 2. an organic solvent which is capable of permeating rapidly through the surface of a film to be coated in completely cured condition and to activate it. The substance (1) is selected from (a) organosilane compounds containing in one molecule more than two different kinds of functional groups and (b) derivative compounds prepared by the reaction of an alkoxide compound or organic complex compound of titanium or aluminum with an epoxy resin which is cross-linked therewith. The invention also relates to a method for preventing subsequently applied overcoating films from peeling by application of the anti-peeling agent to coated iron and steel surfaces.