BITUMEN COMPOSITION EFFECTIVE AT LOW TEMPERATURE AND AT INTERMEDIATE TEMPERATURE Russian patent published in 2019 - IPC C08L53/02 C08L95/00 E01C7/26 

FIELD: chemistry.

SUBSTANCE: invention relates to a bitumen composition for coating roads or a highway, comprising: (a) from 20 to 90 wt. % of the total weight of said composition, at least one bitumen with needle penetration at 25 °C, greater than or equal to 600 tenths of millimeters, wherein value 900 tenths of millimeter is excluded, (b) from 9 to 70 % of the total weight of said composition, at least one blown bitumen with needle penetration at 25 °C, making from 10 to 50 tenths of millimeter, and (c) from 1 to 10 wt. % of the total weight of said composition, at least one cross-linkable polymer, where the polymer is selected from elastomers and/or plastomers, wherein percentages are based on the total weight of said composition, said bitumen composition demonstrates needle penetration value at 25 °C in range of 60 to 90 tenths of a millimeter, wherein said penetration values are measured according to standard NF EN 1426.

EFFECT: invention relates to bituminous binders, bitumen-mineral mixtures and roads or highways, in which characteristics at low temperature are especially improved while maintaining good characteristics at intermediate temperature.

25 cl, 5 tbl, 1 dwg