HEAT-REVERSIBLE BITUMEN COMPOSITION Russian patent published in 2023 - IPC C08L95/00 C09D195/00 C08K5/21 C07C275/20 

FIELD: bituminous compositions.

SUBSTANCE: group of inventions relates to bituminous compositions for the production of asphalt mixtures containing molecules of formula (I), (II) and/or (III), and to a method for their preparation, as well as to a method for transporting, storing and handling bitumen, to a mixture of molecules for for producing said bituminous compositions, a kit for producing said bitumen compositions, containing at least one molecule in at least two separate compartments of one package, and a method for producing asphalt concrete mixtures containing at least said bitumen composition. The composition contains at least one bitumen and a mixture of at least one molecule of the general formula (I):

and at least one molecule of general formula (II) and/or (III):

where: R_C1, R_C2 and R_C3, which may be the same or different, are a hydrocarbon chain containing from 2 to 26 carbon atoms, R_A1, R_A2, R_A3, R_B1 and R_B3, which may be the same or different , are a hydrocarbon group containing from 4 to 150 carbon atoms, X₁, X'₁, X₂, X'₂, X₃ and X'₃, which may be the same or different, represent a chemical functional group selected from functional groups of urethane and urea, P₂ and P₃ which may be the same or different, represent a hydrocarbon group containing from 20 to 250 carbon atoms, A represents the remainder of the multifunctional coupling agent, n and m are integers between 1 and 10.

EFFECT: creation of new bitumen compositions containing a combination of molecules of general formula (I) and molecules of general formula (II) and/or (III) and having good physicochemical and mechanical properties at operating temperatures.

19 cl, 1 dwg, 4 tbl, 2 ex