Aminobenzoic acid derivatives

Patent metadata

Field	Value
Publication number	US-10059900-B2
Application number	US-201715704048-A
Country	US
Kind code	B2
Filing date	Sep 14, 2017
Priority date	Sep 20, 2010
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

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.

First claim

What is claimed is:

1. 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, X 1 is oxygen or sulfur; A is —X 2 —R 3 or —R 3 where X 2 is oxygen or sulfur and R 3 is a hydrocarbyl group containing more than 10 and up to 20 carbon atoms; and wherein R 4 and R 5 are each independently: hydrogen; a hydrocarbyl group; or linked together to form a hydrocarbyl ring; with the proviso that at least one of R 4 and R 5 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.

2. The method of claim 1 wherein (a), the oil of lubricating viscosity, has at least one property selected from the group consisting of: (i) a phosphorus content below 0.2% by weight, (ii) a sulfur content below 1% by weight, and (iii) a sulfated ash content below 1.5% by weight.

3. The method of claim 1 wherein: (i) the nitrogen content of the composition is less than 0.4 percent by weight, (ii) the soap content of the composition is less than 5 percent by weight, or (iii) combinations thereof.

4. The method of claim 1 wherein R 3 is: (i) a hydrocarbyl group containing at least 10 carbon atoms; (ii) a hydrocarbyl group containing at least one branch point; or (iv) combinations thereof.

5. The method of claim 4 wherein R 3 is: (i) a hydrocarbyl group containing at least 10 carbon atoms.

6. The method of claim 1 wherein component (b) is derived from a 4-(dialkylamino)benzoic acid and an alcohol, optionally in the presence of a catalyst.

7. The method of claim 1 wherein component (b) is derived from an alcohol component comprising a mixture of linear alcohols containing 1 to 4 carbon atoms, a mixture of linear alcohols containing 2 to 10 carbon atoms, a mixture of linear alcohols containing 3 to 6 carbon atoms, a mixture of linear alcohols containing 8 to 10 carbon atoms, decyl alcohol, isotridecyl alcohol, 2-ethylhexanol, or combinations thereof.

8. The method of claim 1 further comprising at least one additive selected from the group consisting of non-phosphorus-containing anti-wear agents, ashless dispersants, antioxidants, friction modifiers, zinc dithiophosphates, dispersant viscosity modifiers and corrosion inhibitors.

9. The method of claim 1 , wherein said oil of lubricating viscosity is at least one of an API Group I oil, Group II oil, Group III oil, or mixtures thereof and wherein said oil is present in an amount greater than 50% percent by weight of a total weight of said lubricating composition.

10. The method of claim 1 , wherein the additive (b) is present at 0.5 to 2.0 percent by weight, based on a total weight of the lubricating composition.

Assignees

• Lubrizol Corp

Inventors

• Ivancic Danielle N
• Mosier Patrick E
• Delbridge Ewan E
• Friend Christopher L

Classifications

• C10N2030/45

  Ash-less or low ash content · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10M133/14

  containing hydroxy groups · CPC title

• C10M2223/045

  Metal containing thio derivatives · CPC title

• C10M133/12 Primary

  having amino groups bound to a carbon atom of a six-membered aromatic ring · CPC title