Lubricating oil compositions containing saligenin derivatives
AssigneeThe Lubrizol Corporation
InventorsJody A. Kocsis, James P. Roski, Virginia A. Carrick, Richard A. Denis, Thomas J. Wolak, Gordon D. Lamb, Paul E. Adams, William D. Abraham, Susan V Cowling
Life of this patent
Estimating the term…
Abstract
A saligenin derivative such as the magnesium salt represented by the formula is useful as an additive for a lubricating composition. Preferably X is —CHO or —CH2OH, and Y is —CH2— or —CH2OCH2—. R1 is a hydrocarbyl group containing 1 to 60 carbon atoms and m is 0 to 10. At least one aromatic ring should contain an R1 substituent and the total number of carbon atoms in all R1 groups should be at least 7.
Claims36
A composition comprising (A) a saligenin derivative represented by the formula
- wherein each X independently is —CHO, or —CH2OH, each Y independently is —CH2— or —CH2OCH2—, and wherein such —CHO groups comprise at least about 10 mole percent of the X and Y groups;
- each M is independently hydrogen, ammonium, or a valence of a metal ion;
- each R1 is independently a hydrocarbyl group containing 1 to about 60 carbon atoms;
- m is 0 to about 10;
- and
- each p is independently 0, 1, 2, or 3;
- provided that at least one aromatic ring contains an R1 substituent and that the total number of carbon atoms in all R1 groups is at least 7;
- further provided that if m is 1 or greater, then one of the X groups can be —H.
A process for preparing a saligenin derivative represented by the formula
- wherein each X independently is —CHO or —CH2OH, each Y independently is —CH2— or —CH2OCH2—;
- each R1 is independently a hydrocarbyl group containing 1 to about 60 carbon atoms;
- (Mg) represents a valence of a magnesium ion;
- each n is independently 0 or 1, the average value of n in the composition being about 0.1 to 1.0;
- provided that when n is 0, the Mg is replaced by H;
- m is 0 to about 10;
- and each p is independently 0, 1, 2, or 3;
- provided that at least one aromatic ring contains an R1 substituent and that the total number of carbon atoms in all R1 groups is at least 7;
- further provided that if m is 1 or greater, then one of the X groups can be —H;
- said process comprising:
- combining (a) a phenol substituted by said R1 group with (b) formaldehyde or a source of formaldehyde, and (c) and magnesium oxide or magnesium hydroxide, under reactive conditions in the presence of a catalytic amount of a strong base;
- wherein the equivalent ratio of the substituted phenol to formaldehyde or source thereof is about 1:1 to about 1:4;
- whereby said saligenin derivative is formed such that X is at least in part —CHO and such —CHO groups comprise at least about 10% of the X and Y groups.
Dependencies are inferred from the claim text.