Lubricating oil compositions

Patent metadata

Field	Value
Publication number	US-10358618-B2
Application number	US-201514727916-A
Country	US
Kind code	B2
Filing date	Jun 2, 2015
Priority date	Jun 2, 2014
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A lubricating oil composition having a sulphated ash content of less than or equal to 1.2 mass % as determined by ASTM D874 and a phosphorous content of less than or equal to 0.12 mass % as determined by ASTM D5185, which lubricating oil composition comprises or is made by admixing: an oil of lubricating viscosity, in a major amount; an oil-soluble or oil-dispersible polymeric friction modifier as an additive in an effective minor amount; and, at least one oil-soluble or oil-dispersible molybdenum compound as an additive in an effective minor amount.

First claim

What is claimed is:

1. A lubricating oil composition having a sulphated ash content of less than or equal to 1.2 mass % as determined by ASTM D874 and a phosphorous content of less than or equal to 0.12 mass % as determined by ASTM D5185, which lubricating oil composition comprises or is made by admixing:
(A) an oil of lubricating viscosity, in a major amount;
(B) from about 0.2 to about 1.5 mass % on an active matter basis, of an oil-soluble or oil-dispersible polymeric friction modifier as an additive, the polymeric friction modifier being the reaction product of solely:
(i) polyisobutene functionalized with a diacid or anhydride functional group;
(ii) polyethylene glycol or polypropylene glycol or a mixed poly(ethylene-propylene) glycol; and,
(iii) a C 6 to C 30 aliphatic hydrocarbyl monocarboxylic acid;

and,
(C) at least one oil-soluble or oil-dispersible molybdenum dithiocarbamate compound as an additive in an amount providing the composition with from about 40 to about 500 ppm of molybdenum.

2. A composition as claimed in claim 1 , wherein the functionalised polyolefin (B (i)) is functionalised with a succinic anhydride functional group.

3. A composition as claimed in claim 1 , wherein the functionalised polyolefin (B (i)) is polyisobutylene succinic anhydride (PIBSA).

4. A composition as claimed in claim 1 , wherein (B(ii)) is polyethylene glycol (PEG).

5. A composition as claimed in claim 1 , wherein the C 6 to C 30 aliphatic hydrocarbyl monocarboxylic acid is oleic acid.

6. A method of lubricating a spark-ignited or compression-ignited internal combustion engine comprising lubricating the engine with a lubricating oil composition as claimed in claim 1 .

Assignees

• Infineum Int Ltd

Inventors

• Strong Anthony J
• Woodward Philip J

Classifications

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2030/45

  Ash-less or low ash content · CPC title

• C10N2030/42

  Phosphor free or low phosphor content compositions · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10N2040/255

  Gasoline engines · CPC title