Engine oil lubricant compostions and methods for making same with superior engine wear protection and corrosion protection

Patent metadata

Field	Value
Publication number	US-2022010230-A1
Application number	US-202117341816-A
Country	US
Kind code	A1
Filing date	Jun 8, 2021
Priority date	Jul 9, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

Provided is an engine oil lubricant composition with improved fuel efficiency and engine wear protection. The lubricant composition may include a major amount of an oil basestock from any one or more Group I, Group II, Group III, Group IV or Group V base oils. The resulting engine oil lubricant composition may have a kinematic viscosity at 100° C. of 6 cSt or less, and a corrosion protection of at least 90, as measured according the ASTM D6557 Ball Rust Test. The resulting engine oil lubricant composition may also have a kinematic viscosity at 100° C. of 6 cSt or less, an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C. and a FZG failure load stage of at least 6, as measured by the FZG A10/16.6R/130 test procedure.

First claim

What is claimed is:

1 . An engine oil lubricant composition comprising:
a major amount of an oil basestock, about 0.1 wt % to about 5.0 wt % of a polymeric ethylene oxide friction modifier, and about 0.1 wt % to about 8.0 wt % of at least one viscosity modifier, where the weight percents are based on the total weight of the engine oil lubricant composition, and wherein the engine oil lubricant composition has a kinematic viscosity at 100° C. of 6 cSt or less, and a corrosion protection of at least 90, as measured according the ASTM D6557 Ball Rust Test.

2 . The lubricant composition of claim 1 , wherein the lubricant composition further has an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C.

3 . The lubricant composition of claim 1 , wherein the at least one viscosity modifier comprises a styrenic block copolymer and the oil basestock comprises a Group I, Group II, Group III, Group IV or Group V base oil.

4 . The lubricating engine oil of claim 1 , wherein the oil basestock comprises a Group IV base oil.

5 . The lubricant composition of claim 1 , wherein the major amount of the oil basestock comprises about 69 wt % to 95 wt % of a Group IV base oil, based on the total weight of the engine oil lubricant composition.

6 . The lubricant composition of claim 4 , further comprising about 10 to about 15 wt % of a Group II base oil, based on the total weight of the engine oil lubricant composition.

7 . The lubricant composition of claim 6 , further comprising about 1 to about 3 wt % of a Group V base oil, based on the total weight of the engine oil lubricant composition.

8 . The lubricant composition of claim 6 , wherein the Group II base oil has a kinematic viscosity at 100° C. of from 2 to 6 cSt.

9 . The lubricant composition of claim 6 , wherein the Group II basestock is a Gas to-Liquids (GTL) basestock.

10 . The lubricant composition of claim 7 , wherein the Group V basestock has a kinematic viscosity at 100° C. of from 2 to 6 cSt.

11 . The lubricant composition of claim 7 , wherein the Group V basestock has a kinematic viscosity at 100° C. of 5 cSt or less.

12 . The lubricant composition of claim 1 , further comprising one or more anti-wear additives, other viscosity modifiers, antioxidants, detergents, other dispersants, pour point depressants, corrosion inhibitors, metal deactivators, seal compatibility additives, anti-foam agents, inhibitors, anti-rust additives, or any one or more combinations thereof.

13 . The lubricant composition of claim 1 , wherein the lubricant composition further has a FZG failure load stage of at least 6, as measured by the FZG A10/16.6R/130 test procedure.

14 . An engine oil lubricant composition comprising:
a major amount of an oil basestock, about 0.1 wt % to about 5.0 wt % of a mixed glyceride ester friction modifier, and about 0.1 wt % to about 8 wt % of at least one viscosity modifier, where the weight percents are based on the total weight of the engine oil lubricant composition, and wherein the engine oil lubricant composition has a kinematic viscosity at 100° C. of 6 cSt or less, an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C. and a FZG failure load stage of at least 6, as measured by the FZG A10/16.6R/130 test procedure.

15 . The lubricant composition of claim 14 , wherein the at least one viscosity modifier comprises a styrenic block copolymer and the oil basestock comprises a Group I, Group II, Group III, Group IV or Group V base oil.

16 . The lubricating engine oil of claim 14 , wherein the oil basestock comprises a Group IV base oil.

17 . The lubricant composition of claim 14 , wherein the major amount of the oil basestock comprises about 69 wt % to 95 wt % of a Group IV base oil, based on the total weight of the engine oil lubricant composition.

18 . The lubricant composition of claim 16 , further comprising about 10 to about 15 wt % of a Group II base oil, based on the total weight of the engine oil lubricant composition.

19 . The lubricant composition of claim 18 , further comprising about 1 to about 3 wt % of a Group V base oil, based on the total weight of the engine oil lubricant composition.

20 . The lubricant composition of claim 18 , wherein the Group II base oil has a kinematic viscosity at 100° C. of from 2 to 6 cSt.

21 . The lubricant composition of claim 18 , wherein the Group II basestock is a Gas to-Liquids (GTL) basestock.

22 . The lubricant composition of claim 19 , wherein the Group V basestock has a kinematic viscosity at 100° C. of from 2 to 6 cSt.

23 . The lubricant composition of claim 19 , wherein the Group V basestock has a kinematic viscosity at 100° C. of 5 cSt or less.

24 . The lubricant composition of claim 14 , further comprising one or more anti-wear additives, other viscosity modifiers, antioxidants, detergents, other dispersants, pour point depressants, corrosion inhibitors, metal deactivators, seal compatibility additives, anti-foam agents, inhibitors, anti-rust additives, or any one or more combinations thereof.

25 . An engine oil lubricant composition comprising:
about 65 wt % to 95 wt % of a Group IV base oil having a kinematic viscosity at 100° C. of 5 cSt or less; about 1 wt % to 5 wt % of a Group IV base oil having a kinematic viscosity at 100° C. of 100 cSt to 200 CSt; and about 10 to about 15 wt % of a Group II base oil having a kinematic viscosity at 100° C. of 5 cSt or less, wherein the weight percents are based on the total weight of the engine oil lubricant composition, and wherein the engine oil lubricant composition has a kinematic viscosity at 100° C. of 6 cSt or less, an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C. and a FZG failure load stage of at least 6, as measured by the FZG A10/16.6R/130 test procedure.

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Junuzovic Haris
• Deckman Douglas E
• Eirich Benjamin D

Classifications

• C10N2040/255

  Gasoline engines · CPC title

• C10N2040/252

  Diesel engines · CPC title

• C10N2030/54

  Fuel economy · CPC title

• C10N2030/12

  Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives · CPC title

• C10N2030/06

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