| 摘要 |
Cationic emulsions of bituminous binders of the bitumen/polymer type which are comprised of a dispersion of an organic phase consisting in the bitumen/polymer binder in an aqueous phase containing a cationic nitrogenous emulsifier and a mineral or organic acid, said acid being in an appropriate amount so that the pH of the aqueous phase is comprised between 3 and 9. The aqueous phase also contains a mixing agent consisting of at least one water-soluble sequestring salt of a polyfunctional nitrogenous carboxylic acid, particularly an amine or alkaline metal salt of mono- and di(hydroxy-2 ethyl) glycin acids, and optionally a water-soluble thickening agent. To obtain said emulsions which may be used inter alia for road applications, the emulsifying agent, the admixing agent and optionally the thickening agent may be used in the form of the premixture containing them and called cationic emulsifying system. |
