Spiro compound as detergent additive in lubricants for motorization systems

Patent metadata

Field	Value
Publication number	US-12460148-B2
Application number	US-202218699161-A
Country	US
Kind code	B2
Filing date	Oct 6, 2022
Priority date	Oct 7, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

The present patent application relates to the use, as detergent additive in a lubricating composition intended for a motorization system, of a spiro compound of formula (I)

in which M is an atom selected from boron and aluminum; R, independently of one
another, represent a hydrocarbon group comprising from 1 to 50 carbon atoms; and n1 and
n2, independently of one another, equal 0, 1 or 2.

It also relates to a lubricating composition intended for the lubrication of a motorization system, comprising one or more base oils and at least one spiro compound of formula (I), and to a process for lubricating a motorization system using such a composition.

First claim

The invention claimed is:

1 . A method comprising adding at least one spiro compound to a lubricant comprising at least one base oil, the spiro compound(s) being represented by formula (I):

wherein:
M is chosen from boron or aluminum;
n1 and n2 are independently selected from 0, 1, or 2; and
each R independently represents a hydrocarbon group comprising from 1 to 50 carbon atoms.

2 . The method of claim 1 , wherein each R independently represents a linear or branched aliphatic chain.

3 . The method of claim 1 , wherein:
n1 and n2 are 1; and each R is identical.

4 . The method of claim 1 , wherein M is boron.

5 . The method of claim 1 , wherein the lubricant comprises from 0.1 to 20% by weight of the spiro compound(s), based on the total weight of the lubricant.

6 . The method of claim 1 , wherein the lubricant comprises at least one metallic detergent additive selected from calcium salts, magnesium salts, or a combination thereof.

7 . The method of claim 6 , wherein the lubricant comprises 15% by weight or less of the metallic detergent additive(s), based on the total weight of the lubricant.

8 . The method of claim 1 , wherein the lubricant comprises at least 50% by weight of the base oil(s), based on the total weight of the lubricant.

9 . The method of claim 1 , wherein the lubricant further comprises at least one additive chosen from friction modifiers, anti-wear additives, extreme pressure additives, antioxidants, viscosity index improvers, pour point depressant additives, dispersing agents, anti-foaming agents, thickening agents, corrosion inhibitors, or mixtures thereof.

10 . The method of claim 1 , further comprising using the lubricant to lubricate a diesel, gasoline, gas, or dual fuel engine.

11 . A lubricant for a motor, the lubricant comprising:
at least one base oil; and at least one spiro compound represented by formula (I):

wherein:
M is chosen from boron or aluminum;
n1 and n2 are independently selected from 0, 1, or 2; and
each R group is independently selected from a hydrocarbon group comprising from 1 to 50 carbon atoms.

12 . The lubricant of claim 11 , wherein the lubricant comprises, based on a total weight of the lubricant:
from 1% to 2% by weight of the spiro compound; and from 8% to 13.2% by weight of an additive package comprising:
at least one zinc dithiophosphate anti-wear agent;
at least one calcium-based detergent; and
at least one polyisobutylene succinimide (PIBSI) polymer dispersing agent.

13 . The lubricant of claim 12 , wherein:
M is boron; and each R group comprises a C 8 to C 15 linear alkyl group.

14 . The lubricant of claim 13 , wherein the lubricant comprises from 0.5% to 5.0% by weight of the calcium-based detergent.

15 . The lubricant of claim 14 , further comprising from 2 to 10% by weight of a hydrogenated polyisoprene-styrene (PISH) viscosity index improver.

16 . The lubricant of claim 15 , wherein the lubricant comprises from 4.8% to 6.8% by weight of the PISH viscosity index improver.

17 . The lubricant of claim 15 , wherein the lubricant comprises from 70 to 90% by weight of the base oil.

18 . The lubricant of claim 15 , wherein the base oil comprises a Group III base oil.

Assignees

• Totalenergies Onetech

Inventors

• De Feo Modestino
• Chao Gregory
• Faure Steve

Classifications

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10M2227/062

  Cyclic esters · CPC title

• C10M159/12

  Reaction products · CPC title

• C07F5/04

  Esters of boric acids · CPC title