Lubricating Oil Compositions Containing Sterically Hindered Amines as Ashless TBN Sourcces

• US 20140024569A1
• Filed: 07/17/2012
• Published: 01/23/2014
• Est. Priority Date: 07/17/2012
• Status: Active Grant

• Current Assignee: Infineum International Limited (Infineum)
• Original Assignee: Infineum International Limited (Infineum)
• Inventors: Bera, Tushar K., Hartley, Joseph P., Candido, Gabriele, Li, Guifeng, Gulacsy, Christina
• Granted Patent: US 9,969,950 B2
• Time in Patent Office: Days
• US Class Current: 508/423
• CPC Class Codes: C10M 133/04 Amines, e.g. polyalkylene polyamines; Quaternary amines polyalkylene polyamines with eleven or more monomer units C10M149/22
• CPC Class Codes: C10M 133/06 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2223/045 Metal containing thio derivatives
• CPC Class Codes: C10N 2010/12 Groups 6 or 16
• CPC Class Codes: C10N 2030/36 Seal compatibility, e.g. with rubber
• CPC Class Codes: C10N 2030/45 Ash-less or low ash content
• CPC Class Codes: C10N 2030/52 Base number [TBN]
• CPC Class Codes: C10N 2040/252 Diesel engines
• CPC Class Codes: C10N 2070/02 Concentrating of additives

Abstract

Hindered amines useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials, and lubricating oil compositions containing such compounds.

Claims

1. A lubricating oil composition comprising a major amount of oil of lubricating viscosity and a minor amount of one or more compounds of Formula (I):

2. A lubricating oil composition, as claimed in claim 1, having a TBN of at least about 6 mg KOH/g, as measured in accordance with ASTM D-2896.

3. A lubricating oil composition, as claimed in claim 2, having a TBN of from about 6 to about 18 mg KOH/g, as measured in accordance with ASTM D-2896.

4. A lubricating oil composition, as claimed in claim 1, having a SASH content of no greater than 1.1 mass %.

5. A lubricating oil composition, as claimed in claim 4, having a SASH content of no greater than 1.0 mass %.

6. A lubricating oil composition, as claimed in claim 5, having a SASH content of no greater than 0.8 mass %.

7. A lubricating oil composition, as claimed in claim 4, wherein at least 10% of the compositional TBN, as measured in accordance with ASTM D4739, is derived from ashless TBN sources including at least one compound of Formula (I).

9. A lubricating oil composition, as claimed in claim 1, wherein from about 0.5 to about 4 mg KOH/g of the TBN of the composition, as measured in accordance with ASTM D4739, is derived from a compound of Formula (I).

10. A lubricating oil composition, as claimed in claim 4, having a sulfur content of less than about 0.4 mass, and no greater than 1200 ppm of phosphorus.

11. A lubricating oil composition, as claimed in claim 1, comprising a compound of Formula (I) wherein R₅ is H, R₁, R₂, R₃, R₄, and R₆ are each alkyl groups having 1 to about 6 carbon atoms, and R₇ is either C₁ to C₆ alkyl or 2-aryl, with the proviso that no more than 3 of R₁, R₂, R₃, and R₄ are methyl, simultaneously.

12. A lubricating oil composition, as claimed in claim 1, comprising a compound of Formula (I) having a TBN of at least about 50 mg KOH/g, as measured in accordance with ASTM D-4739.

13. A lubricating oil composition, as claimed in claim 12, comprising a compound of Formula (I) having a TBN of no greater than about 300 mg KOH/g, as measured in accordance with ASTM D-4739.

14. A concentrate for the preparation of a lubricating oil composition, as claimed in claim 1, said concentrate comprising from about 2.5 to about 30 mass % of one or more compounds of Formula (I);

about 10 to about 40 mass % of a nitrogen-containing dispersant;

about 2 to about 20 mass % of an aminic antioxidant, a phenolic antioxidant, a molybdenum compound, or a mixture thereof;

about 5 to 40 mass % of a detergent; and

from about 2 to about 20 mass % of a metal dihydrocarbyl dithiophosphate.

8. A lubricating oil composition, as claimed in claim 8, wherein at least 20% of the compositional TBN, as measured in accordance with ASTM D4739, is derived from at least one compound of Formula (I).

15. A method of increasing the TBN of a lubricating oil composition without concurrently increasing the SASH content, which method comprises adding to said lubricating oil composition one or more compounds of Formula (I):