Process for promoting the adhesion of cementitious material to c

Details Process for promoting the adhesion of cementitious material to c Process for promoting the adhesion of cementitious material to c

1975-09-24

1977-10-18

Hoffman, James R.

Coating processes

With cutting, holding, severing, or abrading the base

Prior to coating

427322, 427346, 427403, B05D 136, B05D 312, B05D 702

Patent

active

040546918

ABSTRACT:
A process for promoting the adhesion of cementitious material to the surface of closed cell generally smooth skinned foam materials which process comprises the sequential steps of (1) applying to the foam surface a substantially continuous first coating of a thermoplastic styrene-butadiene-1,3 copolymer having a styrene to butadiene weight ratio of about 30:70 to 70:30, and based on the weight of said copolymer, (a) from about 2 to about 10 percent of non-ionic surfactant, (b) from about 0.75 to 7.5 percent of anionic surfactant, at least about 15 percent of which is a sodium alkyl sulfate in which the alkyl group contains 9 to 17 carbon atoms, the sum of (a) and (b) not exceeding about 11 percent by weight of said copolymer and the weight ratio of (a) to (b) being within the range of about 0.7:1 to 10:1, then (2) applying an aqueous hydraulic cementitious material to the coated surface prior to substantial dehydration of said first coating, and (3) allowing said cementitious material to harden. Such process is particularly adapted for the preparation of delamination resistant composite panels for use in building construction.

REFERENCES:
patent: 2294247 (1942-08-01), Smith
patent: 2335959 (1943-12-01), Patch
patent: 3043790 (1962-07-01), Sanders
patent: 3512327 (1970-05-01), La Padura
patent: 3592724 (1971-07-01), King et al.

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