FIELD: chemistry.
SUBSTANCE: invention refers to bitumens, particularly bituminous-polymer compositions used in industry and/or road construction. Producing a bitumen/polymer composition uses a mother solution free from mineral oil, containing at least one herbal and/or animal oil, copolymer 20 to 50 wt % based on conjugated diene units and aromatic monovinyl hydrocarbon units, in relation to the mother solution weight, containing or free from at least one cross-linking agent, wherein the above herbal and/or animal oil is an acid; an acid value measured according to NF EN ISO 660 standard makes from 50 to 300 mg potassium hydroxide/g.
EFFECT: this mother solution characterised by the very high concentration of the polymer is stable and does not gelatinise that enables dissolving and using it for producing the cross-linked bitumen/polymer compositions and then bitumen mixtures.
15 cl, 2 tbl
