FIELD: chemistry.
SUBSTANCE: invention discloses a graft polymer, comprising a main polymer chain P, containing conjugated diene links; at least one side graft chain G, represented by general formula (1) R-(OCH2CH2)m-S-, (1), where R is a saturated, linear or branched hydrocarbon chain, containing at least 18 carbon atoms, and m is an integer, ranging from 0 to 20, wherein said graft chain G is bonded to main polymer chain P through a sulphur atom of formula (1); and at least one grafted chain G', represented by general formula (4) -S-R’-S-, (4), where R’ is s hydrocarbon group, saturated or unsaturated, linear or branched, cyclic and/or aromatic, containing from 2 to 40 carbon atoms, optionally containing one or more heteroatoms, wherein said graft chain G' is bonded to main polymer chain P using each sulphur atom from formula (4). Invention discloses a method of producing graft polymer and use thereof to obtain thermoreversibly cross-linked bitumen/polymer composition. Present invention also relates to thermoreversibly cross-linked bitumen/polymer composition, containing such graft polymer, method for production thereof and to a bitumen mixture, including such composition.
EFFECT: technical result is improvement of rheological properties, in particular, mechanical and elastic properties, and cohesive capacity thermoreversibly cross-linked bitumen/polymer compositions.
20 cl, 2 tbl
