Westvaco Corporation

Hans G Schreuders

Peter Schilling

High float asphalt emulsions with high demulsibilities are prepared from asphalts ill-suited for prior art emulsifiers by mixing a combination of fatty acid and the reaction products of fatty acid with acrylic acid, methacrylic acid, fumaric acid, or maleic anhydride in the form of their alkali salts in the soap solution, and adding to the heated asphalt, prior to the emulsification step, reaction products of fatty acids with mono-, di-, and triethanol amine.

Rapid and medium setting high float bituminous emulsions from difficult

Compositions of matter are disclosed which act as cure rate accelerators for bituminous emulsion-aggregate slurries which compositions are formed as the reaction products of an excess of polycarboxylic acid with a polyamine selected from fatty amines, fatty propane diamines, fatty amidoamines, and fatty imidazolines.

Accelerators for cationic aqueous bituminous emulsion-aggregate slurries

Compositions of matter are disclosed which act as cure rate accelerators for bituminous emulsion-aggregate slurries which compositions are formed as the reaction products of aminoethylpiperazine and either C.sub.22 -tricarboxylic acid or C.sub.21 -dicarboxylic acid in a molar ratio of from 0.5:1 to 1:1, respectively.

Slurries are formed with cationic emulsions prepared by emulsifying bitumen, such as an asphalt, in water with a cation-active emulsifier which is the product of the reaction of polyamine with certain polycarboxylic acids, which product is subsequently modified by reaction with from 10-30% of a member of the group consisting of acetic anhydride, phthalic anhydride, propylene carbonate, and styrene oxide.

Cationic aqueous bituminous emulsion-aggregate slurries with improved

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.

Cationic aqueous bituminous emulsion-aggregate slurries preparation

Bituminous emulsion viscosifiers are disclosed to be prepared by condensation of the residue obtained from the distillation of crude tall oil or tall oil derived fatty acids and resin acids (rosin) with various amines, which when added to the asphalt before emulsification produce emulsions of a higher viscosity than the emulsion prepared with the asphalt without the additive, at the same or reduced bitumen content.

Viscosifiers for asphalt emulsions

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 modified polyamine with certain polycarboxylic acids and anhydrides. The modified polyamines are obtained by reacting suitable polyalkylene amines with a sugar-containing syrup, preferably molasses.

Cationic aqueous bituminous emulsion-aggregate slurries

An asphalt composition is disclosed having improved adhesion to aggregate comprising asphalt and an adhesion improving amount of an anti-stripping agent comprising the aminoester reaction product of at least one tall oil fatty acid and triethanolamine.

Tall oil based amino esters as anti-stripping agents for asphalt

Alkaline solutions of combinations of tall oil fatty acids or tallow fatty acids and their reaction products with acrylic acid, fumaric acid and maleic anhydride with and without catalytical amounts of iodine at a dosage of 0.4-0.6% based on the weight of asphalt emulsions are disclosed to be efficient emulsifiers for rapid set high float emulsions. Blends of fatty acids with fumarized or maleinized rosin are also excellent emulsifiers. If dosage levels of above 0.6 to 3.0% are used, medium set high float emulsions are obtained. Combinations of tall oil fatty acid and sulfonated tall oil fatty acid also give medium set high float emulsions.

Rapid and medium setting high float bituminous emulsions

Novel amphoteric emulsifiers are disclosed for solventless and solvent containing mixing grade, oil-in-water anionic and cationic bituminous emulsions, which emulsifiers are the modified reaction products of polyamines with certain polycarboxylic acids and sulfonated carboxylic acids. Modifications are carried out by reacting the nitrogen-containing intermediates with formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, .gamma.-propane sultone, chloroalkane phosphonic acids, acrylic acid, fumaric acid, maleic acid and chloroethanoic acid.

Amphoterics as emulsifiers for bituminous emulsions

Novel amphoteric emulsifiers are disclosed for solventless and solvent containing mixing grade, oil-in-water anionic and cationic bituminous emulsions, which emulsifiers are the modified reaction products of polyamines with certain polycarboxylic acids and sulfonated carboxylic acids. Modifications are carried out by reacting the nitrogen-containing intermediate with formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, .gamma.-propane sultone, chloroalkane phosphonic acids, acrylic acid, fumaric acid, maleic acid and chloroethanoic acid.

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Charleston, SC, United States of America

Hans G Schreuders