Agent for improving moisture resistance of inorganic adhesive for inorganic material and aqueous adhesive for inorganic material

摘要

Problem to be solved: to provide a moisture resistance improving agent to give an aqueous adhesive for inorganic material excellent in adhesion of inorganic material and an aqueous adhesive for use in the inorganic material. The present invention is a moisture resistance improving agent (J) for an inorganic material aqueous adhesive containing at least one (a) polymer (a) selected from the group consisting of the following (CO) polymer (A1) and (a) polymer (A2).(1) polymer (A1): unsaturated (poly) carboxylic acid (anhydride) (A1) having a number of carbon atoms of from 3 to 30 and (a) acrylic acid ester (A2) having a solubility of 10 g or less and 100 g of water (100 g) as a constituent monomer and weight average molecular weight of from 3000 to 150 A polymer ofPolymer (A2): a polymer comprising an unsaturated (poly) carboxylic acid (anhydride) (A1) as a constituent monomer and having (meth) acrylate (A2) as a constituent monomer and weight average molecular weight of from 6000 to