Cationic emulsions of bituminous binding agents of the bitumen/polymer type, and a cationic emulsification system which can be used, in particular, for obtaining such emulsions, and the use of the emulsification system

摘要

PCT No. PCT/FR86/00040 Sec. 371 Date Oct. 14, 1986 Sec. 102(e) Date Oct. 14, 1986 PCT Filed Feb. 12, 1986 PCT Pub. No. WO86/04915 PCT Pub. Date Aug. 28, 1986.This invention provides cationic emulsions of bituminous binders of the bitumen/polymer type, formed by a dispersion of an organic phase of the binder in an aqueous phase containing a cationic nitrogenous emulsifier and a mineral or organic acid, the acid being in appropriate quantity so that the pH of the aqueous phase is comprised between 3 and 9. The aqueous phase also contains an agent consisting of at least one water-soluble sequestering salt of phosphonic acid, particularly a salt of alkaline metal or of amine of hydroxyalkyl-1,1-diphosphonic acid, and optionally a water-soluble thickening agent. To obtain the emulsions, which are usable for road applications, the emulsifying agent, the sequestering agent and optionally the thickening agent may be used in the form of a premixture containing the agents and called cationic emulsifying system.