| 摘要 |
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 |
