| 摘要 |
Bitumen - polyolefin compositions, e.g. for use as binders in paving compositions, are stabilized by an emulsifier system comprising a polyolefin wax with terminal functional groups and a polymeric main chain structure which is compatible with the polyolefin of the dispersed phase of the binder. In a preferred embodiment, the emmulsifier system also includes a metal oxide compound which will chemically react with the terminal functional groups. Especially preferred is maleated polyethylene wax and ferric oxide. The emulsifier system forms a sheath of inorganic material around the dispersed polyolefin droplets, to stabilize them and to hinder their floatation to the surface of the binder composition. |
