| 摘要 |
The invention relates to novel impact resistant graft copolymers of a vinyl aromatic on an ethylene/propylene/tercomponent rubber especially characterized by an improved notched impact strength and resistance to atmospheric corrosion, and a process for their preparation. Said copolymers are obtained by a two-step mass/suspension polymerization process characterized by the presence of oxygen, preferably by the presence of air, at a pressure of from 0.05 to 10 atmospheres gauge during the course of the mass polymerization step. |
