POLYMERIC-BITUMEN BINDING AGENT AND METHOD FOR ITS PREPARING Russian patent published in 2004 - IPC

FIELD: building industry and materials.

SUBSTANCE: invention relates to a new polymeric-bitumen binding agent that can be used for making road coating, bridges, airdromes and other building objects, and to a method for its preparing. Invention provides preparing polymeric-bitumen binding agent in the following ratio of components, wt.-%: bitumen, 54.0-88.0; block-copolymers of butadiene and styrene, 2.0-6.0; product of coal semi-coking, 10.0-40.0; hexamethylenetetramine, 0.1-2.0 above 100%. Thermal resin fraction >230⁰C in coal semi-coking is used as product of coal semi-coking. Polymeric-bitumen binding agent is prepared by the following procedure. In first a mixture of product in coal semi-coking with block-copolymer of butadiene and styrene is prepared at 80⁰C that is kept for 2 h and heated at stirring up to 120⁰C. Then bitumen heated to temperature 110⁰C is added to the prepared mixture and temperature of mixture is elevated to 160⁰C and stirred at this temperature for 0.5 h. Invention provides preparing a binding agent with high adhesion capacity to basic and acid mineral materials.

EFFECT: improved preparing method, valuable properties of binding agent.

4 cl, 1 tbl, 10 ex