TH9933B - Improved anion-carrying emulsion - Google Patents

Abstract

DC60 (16/09/40) This invention relates to rapid-setting, medium-setting, and slow-setting anionic asphalt emulsions prepared from pure asphalt or asphalt modified by blending with polymers, solvents, or polymer latex. Specifically, this invention concerns improved methods for promoting adhesion between asphalt and aggregate in solvent-free and solvent-based anionic asphalt emulsions, where the emulsifying agents are alkaline earth salts of fatty acids of pulp-processing oils, modified fatty acids of pulp-processing oils, resin of pulp-processing oils, and modified resin, as well as mixtures of lignin from drafting paper with nonionic emulsifying agents. The adhesion promoters used in these improved methods are products of the polymerization reaction of styrene(alpha-methylstyrene)-acrylic acid(methacrylic) with polyalkyleneamine. Further improvements may be possible. Using fatty acids of pulp-producing oil byproducts or modified pulp-producing oil byproducts as co-reactants in the production of polyamides, this invention relates to rapid-setting, rapid-setting, medium-setting, and slow-setting anionic emulsions prepared from pure asphalt or asphalt modified by blending with polymers, solvents, or polymer latex. This invention specifically concerns improved methods for promoting adhesion between asphalt and aggregate in solvent-free and solvent-based anionic asphalt emulsions where the emulsifying agents are aldaline earth salts of fatty acids of pulp-producing oil byproducts, fatty acids of modified pulp-producing oil byproducts, resin of pulp-producing oil byproducts, and modified resin, as well as mixtures of lignin from drafting paper with nonionic emulsifying agents. The adhesion promoters used in these improved methods are described. It is a product of the reaction between the polymerization of styrene (alpha-methylstyrene)-acrylic acid (methacrylic acid) and polyalkylene amine. It can be further improved by using fatty acids from pulp-producing by-products or modified pulp-producing by-products as co-reactants in the production of polyamide amine compounds.

Claims (12)

1. An improved method for promoting adhesion between asphalt and aggregate in anionic asphalt emulsions involves the addition of a mixture containing the products of the polyamide condensation reaction of the following compounds to the emulsion: (A) 20–80 percent by weight copolymers made by reaction between (1) compounds of the group containing alpha-methyl styrene, styrene and these compounds together 1–99 percent by weight, and (2) compounds selected from the group containing acrylic acid, methacrylic acid, alkyl esters of acrylic acid, alkyl esters of methacrylic acid and these compounds together 99–1 percent by weight, and (B) 80–20 percent by weight polyamines. 2. The method of claim 1 in which the mixture consists of the products of the polyamide distillation reaction of the following substances: (A) 30-70 percent by weight of polyamides formed by the reaction between (1) a selected substance from the group containing alpha-methyl styrene, styrene and these substances together 20-80 percent by weight, and (2) a selected substance from the group containing acrylic acid, methacrylic acid, alkyl esters of acrylic acid, alkyl esters of methacrylic acid and these substances together 80-20 percent by weight, and (B) 70-30 percent by weight of polyamides. 3. Method of Claim 1, in which the copolymer has an average molecular weight in the numerical range of approximately 1,000 to approximately 10,000. 4. Method of Claim 1, in which polyamines have an average numerical molecular weight in the range of approximately 60 to approximately 1,000. 5. The method of Claim 1, in which polylamins are selected from a group consisting of aminoethyl ethanolamine, aminoethyl piperazine, diethyline diamine, triethylenetetraamine, tetraethylenepentamine, hexaethyleneheptamine, bis-aminopropylamine, pentamethylenediamine, hydroxyethyl piperazine, bis-hexamethylene dilamine, hydrolamine, hydroxylamine, and mixtures of these compounds. 6. The method of Claim 1 involves the dispersion of a mixture in a solvent of choice from a group consisting of ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, aldanollamine, and a combination of these. 7. An improved method for promoting the adhesion of asphalt units to aggregate in anionic asphalt emulsions. The improvement involves adding a mixture to the emulsion containing the products of the polyamide distillation reaction of the following compounds: (A) a mixture of 20–80 percent by weight consisting of (1) a copolymer of 20–80 percent by weight made by reaction between (a) a selected compound from the group containing alpha-methyl styrene, styrene and these compounds together 1–99 percent by weight, and (b) a selected compound from the group containing acrylic acid, methacrylic acid, alkyl esters of acrylic acid, alkyl esters of methacrylic acid and these compounds together 99–1 percent by weight, and (2) a selected compound from the group containing pine resin. Modified pine resin of type C23-C24, fatty acids of type C5-C20, modified fatty acids of type C9-C22 and these compounds together 80-20 percent by weight and (B) polyamine 80-20 percent by weight. 8. Method of claim 7 in which the mixture consists of the product of the polyamide combination reaction of the following substances: (A) a mixture of 30-70 percent by weight consisting of (1) a copolymer of 20-80 percent by weight made by reaction between (a) a selected substance from the group containing methylstyrene, styrene and these substances together 20-80 percent by weight, and (b) a selected substance from the group containing acrylic acid, methacrylic acid, alkylesters of acrylic acid, alkylesters of methacrylic acid and these substances together 80-20 percent by weight, and (2) a selected substance from the group containing pine resin, C23-C24 modified pine resin, C5-C20 fatty acids, C9-C22 modified fatty acids and these substances together 80-20 percent by weight, and (B) a polyamine of 70-30 percent by weight. 9. The method of claim 7, in which the copolymer has a numerically average molecular weight in the range of approximately 1,000 to approximately 10,000. 10. The method of claim number 7, in which polyamines have an average numerical molecular weight in the range of approximately 60 to 1,000. 11. The method of claim 7 in which polyamines are selectable from a group consisting of aminoethyl ethanolamine, aminoethyl piperazine, diethylenetriamine, triethylenetetraamine, tetraethylenepentamine, hexaethyleneheptamine, bis-aminopropylamine, pentamethylenediamine, hydroxyethyl piperazine, bis-hexamethylenetriamine, homologs and mixtures of these substances. 12. The method of claim 7 involves the dispersion of a mixture of substances in a solvent of choice from the group consisting of ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, aldaalamine, and a combination of these substances.