BITUMEN-URETHANE BINDER AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2014 - IPC C08L95/00 C08L75/04 C08J11/22 

FIELD: chemistry.

SUBSTANCE: binder contains bitumen, a product of alcoholysis of elastic polyurethane foam wastes and an isocyanate component. Components are in the following ratio, pts.wt: bitumen 100, product of alcoholysis of elastic polyurethane foam wastes 5-13, isocyanate component 4-12. The binder is obtained by heating petroleum bitumen to temperature of 90-110°C, adding the required amount of the product of alcoholysis of elastic polyurethane foam wastes while mixing constantly; mixing is carried out for 10-60 minutes; the required amount of the isocyanate component is added, after which the binder is mixed for another 10-30 minutes at the same temperature. The method of preparing the binder is highly efficient and safe.

EFFECT: high softening temperature, hardness, elasticity and flexibility at low temperatures.

2 cl, 1 tbl, 3 ex