发明授权
US4970009A Modified VI improvers 失效
改良VI改良剂

Modified VI improvers
摘要:
Lubricating oil composition comprising a major proportion of a mineral lubricating oil and, as viscosity index improver, a hydrogenated block copolymer or olefin copolymer functionalized by the presence of carboxyl groups attached to the polymer chain by a sulphonamide linkage.
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