| 摘要 |
Process for preparing a modifier for bitumen, consisting of: mixing a socalled ''lubricating fraction'' composed of lubricating liquids derived from oil or synthetic products with polymers or polymer mixtures which can be attacked by the ''lubricating fraction'' and with other additives such as atactic ehylene-propylene copolymers, polyolefins, polystirene, polydiene; melting said solid components to make them homogeneous to one another; casting said components in cake-shaped moulds or reducing them to grains; cooling said mixture to room temperature. The obtained product is a modifier to be successively added to bitumen in order to provide impermeable sheaths or other impregnating products, conglomerates or featheredges. |
