Alkyl phosphate amine salts for use in lubricants

Patent metadata

Field	Value
Publication number	US-11168278-B2
Application number	US-201716318783-A
Country	US
Kind code	B2
Filing date	Jul 17, 2017
Priority date	Jul 20, 2016
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A lubricant composition comprising an oil of lubricating viscosity and about 0.01 to about 5 percent by weight of a (thio)phosphoric acid salt (“phos-amine salt”) of at least one hydrocarbyl amine. The hydrocarbyl amine may be a hindered hydrocarbyl amine, an aromatic hydrocarbyl amine, or a combination thereof.

First claim

What is claimed is:

1. A method of reducing seal deterioration as measured using ASTM D 5662 in a mechanical device comprising supplying thereto a lubricant composition comprising an oil of lubricating viscosity and about 0.01 to about 5 percent by weight of a (thio)phosphoric acid salt (“phos-amine salt”) of at least one hydrocarbyl amine that is a tertiary alkyl amine with at least two branched alkyl groups independently branched at the α or the β position.

2. The method of claim 1 , wherein said hydrocarbyl amine is an aromatic hydrocarbyl amine.

3. The method of claim 1 , wherein said hydrocarbyl amine is a hindered hydrocarbyl amine.

4. The method of claim 3 , wherein said hindered hydrocarbyl amine has at least one aromatic group.

5. The method of claim 1 , wherein said hydrocarbyl amine comprises at least one C 1 -C 30 hydrocarbyl group.

6. The method of claim 1 , wherein said hydrocarbyl amine is a hindered amine represented by formula (I)
R 1 —NR 3 —R 2   (I)

wherein R 1 , R 2 , and R 3 are independently a C 1 -C 30 hydrocarbyl group.

7. The method of claim 1 , wherein the at least two branched alkyl groups are both branched at the β position.

8. The method of claim 1 , wherein the (thio)phosphoric acid comprises a mono- or di- hydrocarbyl (thio)phosphoric acid, or mixtures thereof.

9. The method of claim 1 , wherein the (thio)phosphoric acid is prepared by reacting a phosphating agent with a monohydric alcohol and an alkylene polyol.

10. The method of claim 1 , wherein the mole ratio of monohydric alcohol:alkylene polyol is about 0.2:0.8 to about 0.8:0.2.

11. The method of claim 1 , wherein the oil of lubricating viscosity comprises API Group I, II, III, IV, V, or mixtures thereof.

12. The method of claim 1 , wherein the oil of lubricating viscosity has a kinematic viscosity at 100° C. by ASTM D445 of about 3 to about 7.5 mm 2 /s.

13. The method of claim 1 , optionally comprising an overbased alkaline earth metal detergent in an amount to provide 1 to about 500 parts by million by weight alkaline earth metal.

14. The method of claim 1 , optionally comprising 1 to about 30 percent by weight of a polymeric viscosity index modifier.

15. The method of claim 1 , wherein the wear in the mechanical device is also reduced.

Assignees

• Lubrizol Corp

Inventors

• Barton William R S
• Saccomando Daniel J
• Sutton Michael R
• Cook Stephen J
• Vincent Paul R
• Delbridge Ewan E
• Dickess Shawn
• Zhang Yanshi

Classifications

• C10N2040/12

  Gas-turbines · CPC title

• C10M2223/043

  Ammonium or amine salts thereof · CPC title

• C10N2030/36

  Seal compatibility, e.g. with rubber · CPC title

• C10M2215/224

  Imidazoles · CPC title

• C10N2040/04

  Oil-bath; Gear-boxes; Automatic transmissions; Traction drives · CPC title