BITUMEN COMPOSITION AND METHOD FOR PREPARING SAME Russian patent published in 1994 - IPC

FIELD: chemical industry; manufacture of modified hydrocarbon binders such as bitumens, asphalts and oil tars. SUBSTANCE: bitumen composition included 20 - 320 to 80 - 99 parts by weight bitumen, 1 to 20 parts by weight butadiene polymer or butadiene-styrene block copolymer, sulfur, and sulfur-containing additive selected from group including compounds (for structural formulae, refer to specification). Inventors further claimed method for preparing bitumen-polymer compositions. Method as claimed prescribed mixing ingredients at temperature of 150 to 170 C. Butadiene styrene block copolymer involved in process was copolymer with linear or radial or stellate structure and molecular mass of 120,000 to 280,000. Bitumen-soluble amine-containing additive may also be introduced into bitumen in combination with sulfur-containing mixture. It is advisable that amine-containing additive be injected into bitumen at temperature of mixing of composition ingredients. EFFECT: broader variety of applications. 4 cl, 6 tbl