METHOD OF PRODUCING IMPREGNATING COMPOSITION BASED ON MODIFIED BITUMEN USED FOR SURFACE TREATMENT OF ASPHALT-CONCRETE COATINGS Russian patent published in 2017 - IPC C08L95/00 E01C7/35 C08K3/34 C08K5/5419 

FIELD: roads.

SUBSTANCE: invention relates to road construction and a method of producing compositions based on polymer-bitumen binders, which can be used for protection of road asphalt-concrete coatings from adverse effects. Method is implemented by forming a bitumen-polymeric petroleum mixture and introducing it with modifying additives and a petroleum solvent having the boiling point of 140 °C and higher. Modifying additives used are diatomite and a highly concentrated aqueous solution of potassium and/or sodium methyl siliconate, which are added to bitumen in quantities corresponding to the obtained composition containing 52–55 wt% of petroleum bitumen, 9.5–10 wt% of polymeric petroleum resin, 0–3 wt% of mineral oil, 0.1 wt% of diatomite, 0.1 wt% of the solution of potassium and/or sodium methyl siliconate and 35 wt% of the solvent. Herewith the bitumen heated up to 158–162 °C while stirring at the rate of 170–200 rpm is added with the polymeric petroleum resin, the mixture is heated up to 170–180 °C, and then cooled down to 110–120 °C and added with the solvent, the solution of potassium and/or sodium methyl siliconate and diatomite, after which the produced composition is cooled while stirring down to 25–35 °C and packed.

EFFECT: technical result is improved operating properties of impregnating compositions.

4 cl, 2 tbl, 4 ex