| 摘要 |
The process according to the invention is characterized by the following stages: (A) an emulsion of asphalt composition is made starting from (a) an asphalt composition prepared by adding, at a temperature of 100 DEG to 150 DEG C., 20 to 95 parts of asphalt to 5 to 80 parts by weight of a polyurethane extender and from (b) an aqueous phase obtained by solution in water of 1 to 20% by weight of an emulsifier chosen from a polyamine hydrochloride, an amido-amine hydrochloride and a quaternary ammonium salt, then the asphalt composition (a), taken to a temperature of 120 DEG to 150 DEG C., is emulsified with the aqueous phase (b), taken to a temperature of 40 DEG to 80 DEG C.; p0 (B) a polyisocyanate aqueous emulsion is made by mixing, under strong agitation, 20 to 50 parts by weight of an organic polyisocyanate made up to 100 parts with water; and (C) the emulsions (A) and (B) are mixed. They then form, by reticulation at ambient temperature, a polyurethane in the mixture. Use cold in paints, coatings, grouts and surfacings. |
