Stabilized imide graft of ethylene copolymeric additives for lubricants
    6.
    发明授权
    Stabilized imide graft of ethylene copolymeric additives for lubricants 失效
    用于润滑剂的乙烯共聚添加剂的稳定酰亚胺接枝

    公开(公告)号:US4137185A

    公开(公告)日:1979-01-30

    申请号:US819846

    申请日:1977-07-28

    摘要: Oil-soluble, derivatized ethylene copolymers derived from about 2 to 98 wt. % ethylene, and one or more C.sub.3 to C.sub.28 alpha-olefins, e.g. propylene, which are grafted, preferably solution-grafted under an inert atmosphere and at elevated temperatures and in the presence of a high-temperature decomposable free-radical initiator, with an ethylenically-unsaturated dicarboxylic acid material and thereafter reacted with a polyamine having at least two primary amine groups, e.g. an alkylene polyamine such as diethylene triamine, to form carboxyl-grafted polymeric imide, usually maleimide, derivatives are reacted with an anhydride of a C.sub.1 -C.sub.30 hydrocarbyl substituted acid, preferably acetic anhydride, to yield an oil-soluble stable amide of said polyamine whereby oil solutions of said amide derivative are characterized by minimal viscosity change over an extended period of time. Useful number average molecular weight (M.sub.n) of said copolymers range from about 700 to 500,000; however, if the molecular weight is from 10,000 to 500,000 then these copolymers are also useful as multifunctional viscosity index improvers.

    摘要翻译: {PG,1油溶性衍生的乙烯共聚物,衍生自约2-98wt。 %乙烯和一种或多种C {HD 3 {L至C {HD 28 {Lα-烯烃,例如, 丙烯,其在接触的惰性气氛下,优选在高温下和高温可分解的自由基引发剂的存在下用烯键式不饱和二羧酸材料进行溶液接枝,然后与至少具有至少 两个伯胺基,例如 将亚烷基多胺如二亚乙基三胺形成羧基接枝聚合酰亚胺(通常为马来酰亚胺)衍生物与C(HD 1 {L-C(HD 30 {L)烃基取代的酸,优选乙酸酐)的酸酐反应,得到 所述多胺的油溶性稳定酰胺,其中所述酰胺衍生物的油溶液的特征在于延长的时间段内粘度变化最小。 有用的数均分子量(M {HD n {l)为约700至500,000; 然而,如果分子量为10,000至500,000,则这些共聚物也可用作多功能粘度指数改进剂。