Multifunksjonelle viskositetsmodifiserende midler av blandede etylen-alfaolefinkopolymerer som er nyttige i smöreolje sammensetninger

摘要

The present invention relates to novel multifunctional viscosity modifiers comprising a mixture of derivatized ethylene-alpha olefin copolymers, A and B. Said A copolymer comprising from about 30 to about 60 weight percent monomer units derived from ethylene and said B copolymer comprising from about 60 to about 80 weight percent units derived from ethylene.