发明授权
US5759967A Ethylene .alpha.-olefin/diene interpolymer-substituted carboxylic acid dispersant additives 失效
乙烯α-烯烃/二烯互聚物取代的羧酸分散剂添加剂

Ethylene .alpha.-olefin/diene interpolymer-substituted carboxylic acid
dispersant additives
摘要:
The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene/alpha-olefin/diene interpolymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted interpolymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such s amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful lubricating oil additives, e.g., as dispersants.
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