C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/1700, 117/17
C09D 5/02 (2006.01) B05D 5/00 (2006.01) B05D 7/24 (2006.01) C09D 191/06 (2006.01) C09D 201/00 (2006.01)
Patent
CA 2024897
IN THE UNITED STATES PATENT AND TRADEMARK OFFICE AQUEOUS POLYMER EMULSION WATER-REPELLENT COATING COMPOSITION AND METHOD OF APPLICATION Abstract of the Disclosure An aqueous polymer emulsion coating composition and method of application are disclosed for rapidly developing a water repellent film on a porous surface under ambient temperature conditions, the composition containing: (a) up to about 5 wgt. % of an emulsifiable wax; (b) up to about 5 wgt. % of a polybutene polymer; (c) up to about 3 wgt. % and preferably no more than about 1-2 wgt. % of an emulsifier formed from a fatty acid and a volatile amine or NH3; and (d) balance water. The composition is applied to facilitate penetration into pores of the surface. The composition includes at least about 85 wgt. %, preferably about 88 wgt. % water. The emulsifiable wax is preferably paraffin and/or polyethylene. The composition may also include other adjuncts, in particular an additional film-forming polymer which is preferably a polyacrylate. The wax and polymer are selected for the ability of being stably emulsified in water and being carried into the pores of the surface by the water; the emulsifier, upon being exposed to ambient air during application, has its volatile amine or NH3 component volatilized in order to rapidly develop a water repellent film while substantially retaining the original appearance of the porous surface.
Ottoboni Thomas B.
Ryan Mark D.
Borden Ladner Gervais Llp
Olympic Homecare Products Company (the)
Ottoboni Thomas B.
Ppg Architectural Finishes Inc.
Ryan Mark D.
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