IMPREGNANT FOR POROUS MATERIAL AND METHOD OF SEALING PORE OF MATERIAL TO BE TREATED

摘要

PURPOSE:To provide an impregnant which can seal pores of an inorganic material, such as metallic casting or sinter, in a relatively short time at a low temp. and which comprises, as main ingredients, a particular polymerizable vinyl monomer and a cyclodextrin inclusion compd. of a polymerization initiator. CONSTITUTION:An impregnant for a porous material mainly composed of a polymerizable vinyl monomer contg. (meth)acrylic ester and a cyclodextrin inclusion compd. prepd. by treating a polymerization initiator (e.g., a peroxide or azonitrile initiator) with cyclodextrin. This impregnant prolongs its storage file and working file through inclusion of a polymerization initiator, and heating of the inclusion compd. causes the polymerization initiator to be released therefrom, the inclusion compd. to be decomposed, and polymerization to be initiated, so that the impregnant can be cured in a relatively short time at a low temp. The pores of a material to be treated can be sealed by filling the pores with the impregnant, washing the surface of the material with water to remove excessive impregnant, and treating the material with hot water or hot air to cure the impregnant present in the pores.