81.
    发明专利
    未知

    公开(公告)号:ES2090686T3

    公开(公告)日:1996-10-16

    申请号:ES92919583

    申请日:1992-09-10

    Applicant: LUBRIZOL CORP

    Inventor: ADAMS PAUL E

    Abstract: The present invention includes a composition which comprises a major amount of an oil of lubricating viscosity and a minor amount effective to inhibit metal corrosion of a soluble additive mixture comprising (A) at least one amide compound of a mono- or polycarboxylic acid or reactive derivative thereof; and (B) at least about 0.1 mole of at least one amine per mole of amide, provided that when (A) is an amide of a dicarboxylic acid and the amine is an alkanol amine, the mixture contains more than 0.5 equivalent of the amine (B) per equivalent of amide (A). The compositions of the invention exhibit improved corrosion-inhibiting properties and the compositions are useful in a variety of lubrication applications. In particular the compositions are useful as hydraulic fluids.

    86.
    发明专利
    未知

    公开(公告)号:ES2062385T3

    公开(公告)日:1994-12-16

    申请号:ES90308593

    申请日:1990-08-03

    Applicant: LUBRIZOL CORP

    Abstract: The invention provides a composition comprising: (A) at least one dicarboxylic acid or anhydride or at least one ammonium or metal salt of the dicarboxylic acid or anydride; and (B) at least one compound represented by the formula wherein R2, R3, R4 and R5 are each independently hydrogen, alkyl, hydroxyalkyl, polyhydroxyalkyl, polyalkoxyalkyl or hydroxypolyalkoxyalkyl; and R1 is a hydrocarbyl group. In another embodiment, the compositions include (C) at least one acid, or ammonium or metal salt of the acid represented by the formula: wherein R6, R7, R8 and R9 are each independently hydrogen or hydrocarbyl groups; and n is a number from 1 to about 10; (D) at least one ester-salt derived from at least alkyl or alkenyl succinic acid or anhydride of about 8 to about 28 carbon atoms and at least one alkanol amine; or mixtures of (C) and (D). The invention further provides for concentrates and functional fluids containing the above corrosion-inhibitors.

    90.
    发明专利
    未知

    公开(公告)号:DE69005737T2

    公开(公告)日:1994-04-28

    申请号:DE69005737

    申请日:1990-08-03

    Applicant: LUBRIZOL CORP

    Abstract: The invention provides a composition comprising: (A) at least one dicarboxylic acid or anhydride or at least one ammonium or metal salt of the dicarboxylic acid or anydride; and (B) at least one compound represented by the formula wherein R2, R3, R4 and R5 are each independently hydrogen, alkyl, hydroxyalkyl, polyhydroxyalkyl, polyalkoxyalkyl or hydroxypolyalkoxyalkyl; and R1 is a hydrocarbyl group. In another embodiment, the compositions include (C) at least one acid, or ammonium or metal salt of the acid represented by the formula: wherein R6, R7, R8 and R9 are each independently hydrogen or hydrocarbyl groups; and n is a number from 1 to about 10; (D) at least one ester-salt derived from at least alkyl or alkenyl succinic acid or anhydride of about 8 to about 28 carbon atoms and at least one alkanol amine; or mixtures of (C) and (D). The invention further provides for concentrates and functional fluids containing the above corrosion-inhibitors.

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