Nitrogen containing dispersant-viscosity improvers

    公开(公告)号:AU9419398A

    公开(公告)日:1999-06-24

    申请号:AU9419398

    申请日:1998-11-30

    Applicant: LUBRIZOL CORP

    Abstract: A composition comprising a hydrocarbon polymer having Mn ranging from 20,000 to about 500,000, when the polymer is not a star polymer, and up to about GPC peak molecular weight of 4,000,000 when the polymer is a star polymer having attached thereto pendant groups Aa and Bb wherein each A is independently selected from members of the group consisting of: groups of the formula wherein R is H or hydrocarbyl, R is a divalent hydrocarbylene group, n = 0 or 1, and each of R and R is independently H, alkoxyhydrocarbyl, hydroxyhydrocarbyl, hydrocarbyl, aminohydrocarbyl, N-alkoxyalkyl- or hydroxyalkyl-substituted aminohydrocarbyl, or a group of the formula &lparstr& Y &rparstr& cR -M, wherein each Y is independently a group of the formula each R is a divalent hydrocarbyl group, R is as defined above for R and R , and M is H, hydrocarbyl, amino, an amide group, an amide-containing group, an acylamino group, an imide group, or an imide-containing group, and c is 0 or a number ranging from 1 to about 100, or one of R and R taken together with the adjacent N constitute a N-N group; and each B is independently selected from members of the group of formula: wherein each X is independently O, S, or NR , each R is independently H, NH2, hydrocarbyl, hydroxy-hydrocarbyl or aminohydrocarbyl, and each Z is independently a group of the formula

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