Aminobenzoic acid derivatives
AssigneeThe Lubrizol Corporation
InventorsDanielle N. Ivancic, Patrick E. Mosier, Ewan E. Delbridge, Christopher L. Friend
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Abstract
This invention relates to N-alkylated anthranilic acid derivative and their use in lubricants, such as engine oils, as TBN boosters. The invention particularly relates to compositions that deliver an ash-free base to a lubricant in the form of a basic amine additive, without adversely impacting seal compatibility and/or degradation, and methods thereof.
Claims10
A method of lubricating a two- or four-stroke cycle internal combustion engine, comprising supplying to said two- or four-stroke cycle engine a lubricating composition having a sulfated ash content of 1% or less and comprising (a) an oil of lubricating viscosity and (b) an additive of formula (III)(a):
- wherein, X1 is oxygen or sulfur;
- A is —X2—R3 or —R3 where X2 is oxygen or sulfur and R3 is a hydrocarbyl group containing more than 10 and up to 20 carbon atoms;
- and wherein R4 and R5 are each independently:
- hydrogen;
- a hydrocarbyl group;
- or linked together to form a hydrocarbyl ring;
- with the proviso that at least one of R4 and R5 is not hydrogen;
- wherein (b) is present in an amount to boost the TBN of said lubricating composition by at least 1 mg KOH/g such that said lubricating composition has a TBN of at least 6;
- and
- (c) a metal-containing detergent.
Dependencies are inferred from the claim text.