Cationic aqueous bituminous emulsion-aggregate slurries preparation
AssigneeWestvaco Corporation
InventorsPeter Schilling, Hans G. Schreuders
Life of this patent
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Abstract
Cationic aqueous bituminous emulsion-aggregate slurries are disclosed to be formed with cationic emulsions prepared at elevated temperatures by emulsifying bitumen, such as an asphalt, in water with a cation-active emulsifier which is the product of the reaction of a sugar-containing syrup with modified polyamine which is the reaction product of a polyamine with certain polycarboxylic acids and anhydrides.
Claims5
A method of forming a bituminous emulsion at a temperature above 100.degree. F. comprising
- (1) from about 30% to about 80% by weight of bitumen,
- (2) from about 0.1% to about 10% by weight of an emulsifier obtained by reacting a sugar-containing syrup with a modified polyamine prepared by reacting a polyamine with a member selected from the group consisting of fatty acids, animal fats, vegetable oils, tall oil, reaction products of tall oil fatty acids with a member of the group consisting of acrylic acid, methacrylic acid, fumaric acid, maleic anhydride, sulfonated fatty acid, sulfonated resin acids, and reaction products of resin acids with a member of the group consisting of acrylic acid, fumaric acid, and maleic anhydride, epoxidized fats, vegetable oils, and fatty acid esters, and
- (3) water to make up 100% by weight.
A method of forming a paving slurry seal mixture of an aqueous bituminous emulsion and mineral aggregate capable of being worked at a temperature above 100.degree. F. comprising
- (1) mineral aggregate, and
- (2) from about 8% to about 20% of an oil in water type emulsion, based on the weight of the mineral aggregate, wherein the emulsion is comprised of from about 55% to about 65% bitumen, based on the weight of the emulsion, from about 0.5% to about 2% of a cation-active emulsifier, based on the weight of the emulsion, wherein the emulsifier is obtained by reacting a sugar-containing syrup with a modified polyamine which is the reaction product of a polyamine and a precursor selected from the group consisting of fatty acids, animal fats, vegetable oils, tall oil, reaction products of tall oil fatty acids with a member of the group consisting of acrylic acid, methacrylic acid, fumaric acid, maleic anhydride, sulfonated fatty acid, sulfonated resin acids, and reaction products of resin acids with a member of the group consisting of acrylic acid, fumaric acid, and maleic anhydride, epoxidized fats, vegetable oils, and fatty acid esters, and water to make up 100% by weight of the emulsion, and from about 4% to about 16% water, based on the weight of the aggregate, to form a slurry of the aggregate and the emulsion.
Dependencies are inferred from the claim text.