Patent ID: 8840717

Claim:
An additive package for warm-mix asphalt formulations for the pavement of road surfaces, said additive package comprising a) from about 20 to about 60 wt %, based on the total weight of the additive package of surfactant component, and b) about 30 to about 80 wt % of the additive package of an asphalt rheology modifying component, wherein said asphalt rheology modifying component comprises at least one wax component and at least one resin component, wherein the surfactant component comprises at least one surfactant selected from the group consisting of amines, diamines, polyamines, ethoxylated amines, ethoxylated alkyl diamines, ethoxylated alkyl polyamines, amido amines, amidopolyamines, imidazolines, any of their corresponding organic or inorganic salts, and mixtures thereof, wherein the wax component is selected from the group consisting of carnuba wax, beeswax, montan wax from coal, Fischer Tropsch wax from coal, petroleum or gas origin, amide waxes, fatty acids and soaps; fatty alcohols, hydrogenated fats, fatty esters, and mixtures thereof, wherein the resin component is selected from the group consisting of tall oil pitch, pine tar pitch, tall oil rosins, rosin acids, pine rosins, gum rosins, maleated rosins, fumarated rosins, resinous by-products from tall oil processing or the processing of gum rosins, petroleum resins, phenolic resins, maleated tall oil pitch, tall oil heads, natural rubber, styrene butadiene rubber, polychlorprene, crumb rubber, asphaltenes, uintahite, dried asphalt, Trinidad refined asphalt, by-products from the deasphalting of oils, oxidised asphalts, zero penetration asphalts, and mixtures thereof, and wherein said resin component has a Drop melt point >60° F. and a Penetration <50 at 25° C.