US 5,686,398 A · Additive for lubricant or fuel, lubricating oil composition or fuel composition containing it, and substituted hydroxyaromatic ester derivative

Abstract

There are herein disclosed an additive for a lubricant or a fuel which comprises at least one selected from the group consisting of substituted hydroxyaromatic ester derivatives represented by the general formulae (I) and (II) ##STR1## wherein R.sup.1 to R.sup.5 are each an organic group having 6 or more carbon atoms, a, b, d, e, k and m are from 1 to 3, c, f, g, i and j are from 0 to 3, and h is from 0 to 4, but (f+g) is from 1 to 3, and (h+i) is from 1 to 6, an additive composition for a lubricant or a fuel, and a lubricating oil composition or a fuel composition containing the above-mentioned additive. The above-mentioned additive for the lubricant or the fuel is desirable as an ashless detergent excellent in high-temperature stability in place of a metal detergent, and the lubricating oil composition or the fuel composition containing this additive can suitably be used as the lubricant or the fuel for an internal combustion engine which can comply with future exhaust gas controls.

Claims34

Dependent claims

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 R.sup.1 and R.sup.2 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.ltoreq.a.ltoreq.3, 1.ltoreq.b.ltoreq.3, 0.ltoreq.c.ltoreq.3, 1.ltoreq.d.ltoreq.3, 1.ltoreq.e.ltoreq.3, 3.ltoreq.(a+b+e).ltoreq.6 and 1.ltoreq.(c+d).ltoreq.5, respectively;
and when a plurality of R.sup.1 s and R.sup.2 s are present, they may be the same or different, and the general formula (II) ##STR41## wherein R.sup.3, R.sup.4 and R.sup.5 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.ltoreq.f.ltoreq.3, 0.ltoreq.g.ltoreq.3, 1.ltoreq.(f+g).ltoreq.3, 0.ltoreq.h.ltoreq.4, 0.ltoreq.i.ltoreq.3, 1.ltoreq.(h+i).ltoreq.6, 0.ltoreq.j.ltoreq.3, 1.ltoreq.k.ltoreq.3, 1.ltoreq.m.ltoreq.3, 3.ltoreq.(f+g+h+i+m).ltoreq.8 and 1.ltoreq.(j+K).ltoreq.5, respectively;
and when a plurality of R.sup.3 s, R.sup.4 s and R.sup.5 s are present, they may be the same or different.

1 more element

An additive for a fuel which comprises at least one selected from the group consisting of substituted hydroxyaromatic ester derivatives represented by the general formula (I) ##STR44## wherein R.sup.1 and R.sup.2 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.ltoreq.a.ltoreq.3, 1.ltoreq.b.ltoreq.3, 0.ltoreq.c.ltoreq.3, 1.ltoreq.d.ltoreq.3, 1.ltoreq.e.ltoreq.3, 3.ltoreq.(a+b+e).ltoreq.6 and 1.ltoreq.(c+d).ltoreq.5, respectively;
and when a plurality of R.sup.1 s and R.sup.2 s are present, they may be the same or different, and the general formula (II) ##STR45## wherein R.sup.3, R.sup.4 and R.sup.5 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.ltoreq.f.ltoreq.3, 0.ltoreq.g.ltoreq.3, 1.ltoreq.(f+g).ltoreq.3, 0.ltoreq.h.ltoreq.4, 0.ltoreq.i.ltoreq.3, 1.ltoreq.(h+i).ltoreq.6, 0.ltoreq.j.ltoreq.3, 1.ltoreq.k.ltoreq.3, 1.ltoreq.m.ltoreq.3, 3.ltoreq.(f+g+h+i+m).ltoreq.8 and 1.ltoreq.(j+K).ltoreq.5, respectively;
and when a plurality of R.sup.3 s, R.sup.4 s and R.sup.5 s are present, they may be the same or different.

1 more element

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims34