Aqueous water-repellent coatings

Details Aqueous water-repellent coatings Aqueous water-repellent coatings

C - Chemistry, Metallurgy

08

K

400/1703, 400/55

C08K 5/01 (2006.01) C08L 91/08 (2006.01) C09D 133/06 (2006.01) C08L 75/04 (2006.01) C08L 91/06 (2006.01)

Patent

CA 1246763

AQUEOUS WATER-REPELLENT COATINGS ABSTRACT An aqueous coating composition is disclosed which contains a large proportion of wax which dries to provide a continuous and durable film from which the wax exudes slowly and progressively to the surface over a long period of time to provide long term water resistance. This composition comprises: (1)from 5% to 40% of an aqueous microcrystalline wax dispersion; (2) from 40% to 93% of an aqueous emulsion of copolymerized monoethylenically unsaturated monomers having a sufficiently low glass transition temperature to coalesce on air drying; and (3) from 1% to 20% of an N-methylol functional self crosslinking polyurethane aqueous dispersion in which the polyurethane contains sufficient volatile amine-neutralized carboxyl groups for water dispersibility, these proportions being by weight based on the solids content of the three components which are blended together.

497430

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