PRIMER COMPOSITION FOR ACRYL MODIFIED URETHANE SEALANT

摘要

PURPOSE:The titled composition having improved adhesiveness to Portland cement mortar, etc., comprising a mixture of a copolymer obtained from (meth) acrylonitrile, (meth)acrylic acid derivative, etc. and a silane coupling agent as a main component. CONSTITUTION:The desired composition comprising a mixture of (A) a copolymer obtained by copolymerizing a monomer mixture consisting of =70wt% (i) (meth)acrylonitrile, (ii) methacrylate compound shown by the formula I (R1 is 1-4C alkyl), (iii) a styrenic derivative shown by the formula II (n is number of methyl groups in benzene ring and 1-3), and (iv) a compound shown by the formula III (R2 is H or CH3; X is COOH, group shown by the formula IV, CONH2, etc.) and (B) =20wt% silane coupling agent based on the copolymer as a main component.