Patent ID: 9574102
Date: 2017-02-21
CPC Classifications: B32B,C04B,C08F,C08L,C09D

Claim:
1. A method of inhibiting moisture vapor emission from the surface of a concrete structure and enhancing interfacial adhesion between the concrete surface and a covering thereon comprising applying to the concrete surface an aqueous mixture of at least one first copolymer comprising mer units derived from vinylidene halide and mer units derived from C 1 -C 2 alkyl acrylate, said mer units derived from C 1 -C 2 alkyl acrylate being present in from 5 to 40 weight percent of the first copolymer; and at least one second copolymer comprising mer units derived from vinylidene halide and mer units derived from C 4 -C 5 alkyl acrylate, said mer units derived from C 4 -C 5 alkyl acrylate being present in from 3 to 40 weight percent of the second copolymer; the first and second copolymers together form from 10 to 50 weight percent of the aqueous mixture; and the aqueous mixture has a pH of 1.5 to 3.5; said aqueous mixture substantially uniformly applied to the surface to distribute a coating having from 0.4 to 4 kg of copolymer mixture per 14 m 2 of free surface of the concrete structure.