METHOD OF OBTAINING POLYMER-BITUMEN COMPOSITIONS Russian patent published in 2014 - IPC C08L95/00 C08F2/14 C08J3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to obtaining polymer-bitumen compositions, based on oil bitumens. The obtained compositions can be used in road building as a binding agent for asphalt-concrete mixtures, in industrial and civil construction for roofing and waterproofing works, for production of mastics and glues. The method includes heating bitumen and a polymer-modifier with mixing, with the polymer-modifier being obtained directly in the bitumen medium by radical polymerisation of vinyl monomers at a temperature of 60-80°C in the presence of a radical polymerisation initiator. The process of the composition obtaining is carried out for 2-4 hours at the same temperature. As bitumen oil bitumen is used. A ratio of components is the following, wt %: vinyl monomer 2-10; initiator, wt % of the monomer weight - 0.5-4; oil bitumen - the remaining part.

EFFECT: extension of assortment of polymer-bitumen compositions with improved exploitation characteristics with simplification of technology of the composition preparation, providing possibility of carrying out the process of preparing compositions in a continuous mode and absence of expensive ingredients in their obtaining.

2 tbl, 1 ex