Method of preventing environmental erosion
AssigneeThe Dow Chemical Company
InventorKenneth H. Nimerick
Life of this patent
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Abstract
The surface of a mass of finely divided particulate matter, e.g. the surface of a coal pile, is treated by applying to the surface a combination of an organic polymer latex and a silicone to provide a water repellant surface.
Claims13
A method for treating the surface of a pile or mass of finely divided particulate matter which comprises:
- applying to said surface in synergistic combination an amount of a film forming organic polymer sufficient to penetrate said surface to form a water-wettable supporting crust and an amount of a silicone sufficient to form a hydrophobic coating on said crust.
A method for treating the surface of a mass of finely divided particulate material which comprises sequentially:
- (a) applying to said surface an amount of a film forming organic polymer sufficient to penetrate the surface of the matter to be protected to form a water-wettable supporting crust, and
- (b) applying to said surface an amount of a silicone which forms a hydrophobic coating on a substrate sufficient to waterproof the crust, said organic polymer and silicone being provided in a synergistic combination.
A method for protecting the surface of a pile or mass of finely divided particulate matter from environmental erosion, which comprises sequentially:
- (a) applying to said surface an aqueous mixture containing a copolymer formed by the interpolymerization of the reactants, by weight, 36.5% styrene, 60% butadiene, 2% acrylic acid, and 1.5% maleic anhydride, and sodium methyl siliconate, said copolymer and said siliconate being present in said aqueous mixture in a weight ratio of from about 12:1 to 1:1, such mixture being applied in a density of from about 0.25 to about 13 pounds of solids per 100 square feet of surface,
- (a) allowing the applied composition to cure, and
- (c) repeating step (a).
A method of treating a mass of finely divided particulate material to reduce the erosion and water penetration thereof which comprises:
- (a) applying to the surface of said mass a mixture of latex containing as the solids a copolymer of the interpolymerization of, as percent by weight, 36.5 percent styrene, 60.0 percent butadiene, 2.0 percent acrylic acid, and 1.5 percent maleic anhydride and also in said mixture sodium methyl siliconate, the weight ratio of said copolymer to sodium methyl siliconate in said mixture ranges from about 12:1 to 1:1,
- (b) curing said applied mixture to form a crust with said surface;
- and
- (c) applying to said cured mixture an amount of sodium methyl siliconate which forms a hydrophobic coating on a substrate sufficient to waterproof said crust.
Dependencies are inferred from the claim text.