FIELD: chemistry.
SUBSTANCE: method involves bringing into contact at least one bitumen or a mixture of bitumens with at least one copolymer based on conjugated diene units and aromatic monovinyl hydrocarbon units, and at least one cross-linking agent at temperature ranging from 100°C to 230°C and stirring. The cross-linking agent being represented by the general formula HS-R-SH, where R is selected from a group consisting of a saturated or unsaturated, linear or branched, and/or an aromatic hydrocarbon group containing 8-40 carbon atoms, and a similar group but containing 2-40 carbon atoms and containing one or more heteroatoms, and not containing C=O and/or O-C-O functional groups. The invention also relates to use of said cross-linking agent to reduce emission of hydrogen sulphide when producing cross-linked bitumen-copolymer compositions and to a bitumen-copolymer composition obtained using said method.
EFFECT: obtained compositions have rheological properties which match bitumen-polymer compositions that are cross-linked with sulphur, particularly with respect to elasticity and consistency, and have reduced or even zero emission of hydrogen sulphide during cross-linking thereof.
28 cl, 5 tbl, 8 ex
