PHOSPHATE COMPOUNDS AS ADHESION PROMOTORS Russian patent published in 2018 - IPC C08L95/00 C04B26/26 E01C7/22 

FIELD: chemistry.

SUBSTANCE: invention relates to application of a phosphate derivative to promote adhesion between bitumen and aggregates in an asphalt composition. The composition contains bitumen and a phosphate derivative. The phosphate derivative is obtained as a result of: i) etherification of a polyhydric alcohol containing at least three hydroxyl groups with a carboxylic acid containing 8-24 carbon atoms or a derivative thereof, wherein at least one, but not all hydroxyl groups undergo etherification, provided that if the polyhydric alcohol contains 5 or more hydroxyl groups, then at least two, but not all hydroxyl groups will be subjected to etherification, followed by introduction of the resulting ester into the reaction with a phosphating reagent; or ii) carrying out transetherification of triglyceride under the action of glycerine, followed by reaction with a phosphating reagent. Moreover, the said composition is not a "bitumen in water" emulsion.

EFFECT: proposed additive increases bitumen adhesion to acidic and basic aggregates, and demonstrates good ecological characteristics.

19 cl, 5 tbl, 4 ex