Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic compound containing boron
Reexamination Certificate
2001-09-12
2003-06-24
McAvoy, Ellen M. (Department: 1764)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic compound containing boron
C508S199000, C508S287000, C508S378000, C508S518000, C508S578000
Reexamination Certificate
active
06583092
ABSTRACT:
TECHNICAL FIELD
This invention relates to lubricating oil compositions. More particularly, this invention relates to lubricating oil compositions containing saligenin derivative salts and salicylates.
BACKGROUND OF THE INVENTION
The allowable level of sulfur in diesel and gasoline fuels is expected to drop to 15 parts per million (ppm) with zero-sulfur fuel already being introduced in select locations. As a result, a substantial portion of the sulfur in emissions from engines operated with these fuels will be attributed to the lubricant. This will necessitate reduced levels of sulfur in such lubricants. A source of sulfur often found in many of these lubricants comes from sulfonate and phenate detergents. The problem therefore is to provide for a partial or complete replacement for such sulfonate and phenate detergents without reducing the performance attributes of the lubricant.
The present invention provides a solution to this problem by providing lubricating oil compositions containing saligenin derivative salts and salicylates as complete or partial replacements for the sulfonate and phenate detergents. The use of such saliginin derivative salts and salicylates provides the advantage of a sulfur-free detergent that does not reduce the performance attributes of the lubricants, and in at least one embodiment, provides the lubricant with improved high temperature deposit performance, oxidative stability, lead and copper corrosion inhibition, and improved seal compatibility.
SUMMARY OF THE INVENTION
This invention relates to a lubricating oil composition, comprising:
(A) a base oil;
(B) an alkali or alkaline earth metal salt of a saligenin derivative represented by the formula;
wherein in formula (B-I): each X independently is —CHO or —CH
2
OH; each Y independently is —CH
2
— or —CH
2
OCH
2
—; wherein the —CHO groups comprise at least about 10 mole percent of the X and Y groups; each M is independently the valance of an alkali or alkaline earth metal ion; each R is independently a hydrocarbyl group containing 1 to about 60 carbon atoms; m is 0 to about 10; n is 0 or 1 provided that when n is 0 the M is replaced with H; and each p is independently 0, 1, 2, or 3; provided that at least one aromatic ring contains an R substituent and that the total number of carbon atoms in all R groups is at least 7; and further provided that one of the X groups can be H;
(C) an alkali or alkaline earth metal salt of a hydrocarbon-substituted salicylic acid; and
(D) a metal salt of a phosphorus-containing compound represented by the formula
wherein in formula (D-I), X
1
, X
2
, X
3
and X
4
are independently O or S; a and b are independently zero or 1; and R
1
and R
2
are independently hydrocarbyl groups.
DETAILED DESCRIPTION OF THE INVENTION
The term “hydrocarbyl” denotes a group having a carbon atom directly attached to the remainder of the molecule and having a hydrocarbon or predominantly hydrocarbon character within the context of this invention. Such groups include the following:
(1) Purely hydrocarbon groups; that is, aliphatic, (e.g., alkyl or alkenyl), alicyclic (e.g., cycloalkyl or cycloalkenyl), aromatic, aliphatic- and alicyclic-substituted aromatic, aromatic-substituted aliphatic and alicyclic groups, and the like, as well as cyclic groups wherein the ring is completed through another portion of the molecule (that is, any two indicated substituents may together form an alicyclic group). Such groups are known to those skilled in the art. Examples include methyl, ethyl, octyl, decyl, octadecyl, cyclohexyl, phenyl, etc.
(2) Substituted hydrocarbon groups; that is, groups containing non-hydrocarbon substituents which do not alter the predominantly hydrocarbon character of the group. Those skilled in the art will be aware of suitable substituents. Examples include hydroxy, nitro, cyano, alkoxy, acyl, etc.
(3) Hetero groups; that is, groups which, while predominantly hydrocarbon in character, contain atoms other than carbon in a chain or ring otherwise composed of carbon atoms. Suitable hetero atoms will be apparent to those skilled in the art and include, for example, nitrogen, oxygen and sulfur.
In general, no more than about three substituents or hetero atoms, and preferably no more than one, will be present for each 10 carbon atoms in the hydrocarbyl group.
Terms such as “alkyl-based,” “aryl-based,” and the like have meanings analogous to the above with respect to alkyl groups, aryl groups and the like.
The terms “hydrocarbon” and “hydrocarbon-based” have the same meaning and can be used interchangeably with the term hydrocarbyl when referring to molecular groups having a carbon atom attached directly to the remainder of a molecule.
The term “lower” as used herein in conjunction with terms such as hydrocarbyl, alkyl, alkenyl, alkoxy, and the like, is intended to describe such groups which contain a total of up to 7 carbon atoms.
The term “oil-soluble” refers to a material that is soluble in mineral oil to the extent of at least about one gram per liter at 25° C.
The term “TBN” refers to total base number. This is the amount of acid (perchloric or hydrochloric) needed to neutralize all or part of a material's basicity, expressed as milligrams of KOH per gram of sample.
The Lubricating Oil Composition
The inventive lubricating oil composition is comprised of one or more base oils which are generally present in a major amount (i.e. an amount greater than about 50% by weight). Generally, the base oil is present in an amount greater than about 60%, or greater than about 70%, or greater than about 75% by weight of the lubricating oil composition.
The inventive lubricating oil composition may have a viscosity of up to about 16.3 cSt at 100° C., and in one embodiment about 5 to about 16.3 cSt at 100° C., and in one embodiment about 6 to about 13 cSt at 100° C.
The inventive lubricating oil composition may have an SAE Viscosity Grade of 0W, 0W-20, 0W-30, 0W-40, 0W-50, 0W-60, 5W, 5W-20, 5W-30, 5W-40, 5W-50, 5W-60, 10W, 10W-20, 10W-30, 10W-40, 10W-50, 10W-60, 15W-30, 15W40 or 15W-50.
The inventive lubricating oil composition may have a sulfur content of up to about 0.25% by weight, and in one embodiment about 0.01 to about 0.25% by weight, and in one embodiment about 0.02 to about 0.25% by weight, and in one embodiment about 0.03 to about 0.25% by weight, and in one embodiment about 0.04 to about 0.25% by weight, and in one embodiment about 0.05 to about 0.25%, and in one embodiment about 0.07 to about 0.25% by weight, and in one embodiment about 0.10 to about 0.25% by weight, and in one embodiment about 0.01 to about 0.20% by weight, and in one embodiment about 0.02 to about 0.20% by weight, and in one embodiment about 0.03 to about 0.20% by weight, and in one embodiment about 0.04 to about 0.20% by weight, and in one embodiment about 0.05 to about 0.20% by weight, and in one embodiment about 0.07 to about 0.20% by weight, and in one embodiment about 0.10 to about 0.20% by weight, and in one embodiment about 0.15 to about 0.20% by weight, and in one embodiment about 0.17% by weight, and in one embodiment about 0.01 to about 0.15% by weight, and in one embodiment about 0.02 to about 0.15% by weight, and in one embodiment about 0.03 to about 0.15% by weight, and in one embodiment about 0.04 to about 0.15% by weight, and in one embodiment about 0.05 to about 0.15% by weight, and in one embodiment about 0.07 to about 0.15% by weight, and in one embodiment about 0.10 to about 0.15% by weight.
The inventive lubricating oil composition may have a boron content of up to about 0.2% by weight, and in one embodiment about 0.01 to about 0.2% by weight, and in one embodiment about 0.015 to about 0.12% by weight, and in one embodiment about 0.05 to about 0.1% by weight.
The inventive lubricating oil composition may have a phosphorus content of up to about 0.1% by weight, and in one embodiment up to about 0.09% by weight, and in one embodiment up to about 0.08% by weight, and in one embodiment up to about 0.075% by weight, and in one embodiment up to about 0.07% by weight, and in one embodiment up
Abraham William D.
Bardasz Ewa A.
Carrick Virginia A.
Lamb Gordon D.
DuChez Neil A.
Esposito Michael F.
McAvoy Ellen M.
Shold David M.
The Lubrizol Corporation
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