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Additive for lubricant or fuel, lubricating oil composition or fuel composition containing it, and substituted hydroxyaromatic ester derivative

  • US 5,686,398 A
  • Filed: 12/06/1995
  • Issued: 11/11/1997
  • Est. Priority Date: 06/15/1993
  • Status: Expired due to Term
First Claim
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1. An additive for a lubricant comprising at least one selected from the group consisting of substituted hydroxyaromatic ester derivatives represented by the general formula (I) ##STR40## wherein R1 and R2 are each an organic group having 6 or more carbon atoms, and they may be the same or different;

  • a, b, c, d and e are integers satisfying the relations of 1≦

    a≦

    3, 1≦

    b≦

    3, 0≦

    c≦

    3, 1≦

    d≦

    3, 1≦

    e≦

    3, 3≦

    (a+b+e)≦

    6 and 1≦

    (c+d)≦

    5, respectively; and

    when a plurality of R1 s and R2 s are present, they may be the same or different, and the general formula (II) ##STR41## wherein R3, R4 and R5 are each an organic group having 6 or more carbon atoms, and they may be the same or different;

    f, g, h, i, j, k and m are integers satisfying the relations of 0≦

    f≦

    3, 0≦

    g≦

    3, 1≦

    (f+g)≦

    3, 0≦

    h≦

    4, 0≦

    i≦

    3, 1≦

    (h+i)≦

    6, 0≦

    j≦

    3, 1≦

    k≦

    3, 1≦

    m≦

    3, 3≦

    (f+g+h+i+m)≦

    8 and 1≦

    (j+K)≦

    5, respectively; and

    when a plurality of R3 s, R4 s and R5 s are present, they may be the same or different.

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