发明授权
US4764304A Hydrocarbon compositions containing polyolefin graft polymers 失效
含有聚烯烃接枝聚合物的烃组合物

Hydrocarbon compositions containing polyolefin graft polymers
摘要:
Dispersant viscosity index improvers for lubricating oils contain an EPR or EPT polymer onto which has been graft polymerized isocyanatoethyl methacrylate and thereafter reacted with N-methyl piperazine.
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