# US 2023/0265356 A1 · Engine oil formulation with improved sequence viii performance

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- Number: US 2023/0265356 A1
- Document ID: US20230265356A1
- Status: Published application
- Kind: A1
- Application number: 17/675,930
- Filed: 2022-02-18
- Published: 2023-08-24
- Earliest claimed: 2022-02-18
- Assignees: Afton Chemical Corporation
- Applicants: Afton Chemical Corporation
- Inventors: Todd Dvorak; Kenneth Garelick; Mark Devlin
- Web page: https://patentgrep.com/patent/US20230265356A1

## CPC

- C10M 141/12: at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
- C10M 169/044: {the additives being a mixture of non-macromolecular and macromolecular compounds}
- C10M 129/74: of polyhydroxy compounds
- C10M 137/10: Thio derivatives
- C10M 141/10: at least one of them being an organic phosphorus-containing compound
- C10M 143/06: containing butene
- C10M 155/00: Lubricating compositions characterised by the additive being a macromolecular compound containing atoms of elements not provided for in groups C10M143/00 - C10M153/00
- C10M 157/10: at least one of them being a compound containing atoms of elements not provided for in groups C10M157/02 - C10M157/08
- C10M 161/00: Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
- C10M 2203/003: used as base material
- C10M 2205/026: Butene
- C10M 2207/283: of polyhydroxy compounds
- C10M 2207/289: containing free hydroxy groups
- C10M 2215/28: Amides; Imides
- C10M 2223/045: Metal containing thio derivatives
- C10M 2229/00: Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10N 2020/04: Molecular weight; Molecular weight distribution
- C10N 2030/04: Detergent property or dispersant property
- C10N 2030/12: Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
- C10N 2040/25: Internal-combustion engines
- C10N 2060/14: by boron or a compound containing boron
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

A lubricating oil composition comprising greater than 50 wt. % of a base oil of lubricating viscosity; an amount of one or more ester(s) of a polyhydric alcohol; an amount of one or more boron-containing dispersant(s); wherein a ratio of the amount of the one or more ester(s) of a polyhydric alcohol in weight percent provided to the lubricating oil composition, to an amount of boron in weight percent provided by the one or more boron-containing dispersant(s), based on the total weight of the lubricating oil composition is less than 40. The lubricating oil composition has improved corrosion performance in an engine or other mechanical components lubricated with the lubricating oil.

## Claims

### Claim 1

A lubricating oil composition comprising:
greater than 50 wt. % of a base oil of lubricating viscosity;
less than 0.60 wt. % of one or more ester(s) of a polyhydric alcohol based on the total weight of the lubricating oil composition, wherein the one or more ester(s) of a polyhydric alcohol is prepared from a polyhydric alcohol having from 2 to 4 hydroxyl groups and a carboxylic acid having from 8 to 22 carbon atoms;
one or more boron-containing dispersant(s) in an amount sufficient to provide greater than 0.006 wt. % to 0.08 wt. % of boron to the lubricating oil composition, based on the total weight of the lubricating oil composition;
greater than 0.25 wt. % of a non-borated dispersant;
a ratio of the amount of the one or more ester(s) of a polyhydric alcohol in weight percent provided to the lubricating oil composition, to an amount of boron in weight percent provided by the one or more boron-containing dispersant(s), based on the total weight of the lubricating oil composition is less than 40; and
wherein the lubricating oil composition has a bearing weight loss of less than 25 as measured by ASTM D6709.

### Claim 2 (depends on 1)

The lubricating oil composition of claim 1, wherein the amount of the one or more ester(s) of the polyhydric alcohol is less than 0.40 wt. %, based on the total weight of the lubricating oil composition.

### Claim 3

(canceled)

### Claim 4 (depends on 1)

The lubricating oil composition of claim 1, wherein the one or more ester(s) of a polyhydric alcohol is a glycerol monooleate compound.

### Claim 5 (depends on 1)

The lubricating oil composition of claim 1, wherein the one or more boron-containing dispersant(s) is present in an amount to provide greater than 0.006 wt. % to 0.0385 wt. % of boron to the lubricating oil composition, based on the total weight of the lubricating oil composition.

### Claim 6 (depends on 1)

The lubricating oil composition of claim 1, wherein the one or more boron-containing dispersant(s) is prepared from a polyisobutenyl group having a number average molecular weight of from about 500 g/mol to about 1800 g/mol, as measured by gel permeation chromatography.

### Claim 7

(canceled)

### Claim 8 (depends on 1)

The lubricating oil composition of claim 1, wherein the second dispersant is prepared from a polyisobutenyl group having a number average molecular weight of from about 1500 g/mol to about 3000 g/mol, as measured by gel permeation chromatography.

### Claim 9

(canceled)

### Claim 10 (depends on 1)

The lubricating oil composition of claim 1, wherein a nitrogen concentration from total dispersants is greater than about 400 ppmw nitrogen, based on a total weight of the lubricating oil composition.

### Claim 11 (depends on 1)

The lubricating oil composition of claim 1, further comprising one or more metal-containing detergents; or one or more calcium containing detergent(s) present in an amount to provide greater than 950 ppmw Ca to the total weight of the lubricating oil composition.

### Claim 12 (depends on 11)

The lubricating oil composition of claim 11, wherein the one or more calcium containing detergent(s) is an overbased calcium containing detergent having a total base number of about 200 mg KOH/g or greater.

### Claim 13 (depends on 12)

The lubricating oil composition of claim 12, wherein the one or more overbased calcium containing detergent(s) comprises an overbased calcium sulfonate detergent, an overbased calcium phenate detergent, an overbased calcium salicylate detergent, and mixtures thereof.

### Claim 14 (depends on 11)

The lubricating oil composition of claim 11, wherein the one or more calcium containing detergent(s) comprises a low based or neutral calcium containing detergent having a total base number of less than 175 mg KOH/g.

### Claim 15 (depends on 14)

The lubricating oil composition of claim 14, wherein the low based or neutral calcium containing detergent comprises a calcium sulfonate detergent, a calcium phenate detergent, a calcium salicylate detergent, and mixtures thereof.

### Claim 16 (depends on 14)

The lubricating oil composition of claim 14, wherein the low based or neutral calcium containing detergent is present in an amount of from greater than 5 ppmw Ca to about 500 ppmw Ca, based on the total weight of the lubricating oil composition.

### Claim 17 (depends on 1)

The lubricating oil composition of claim 1, further comprising a zinc dialkyl dithiophosphate.

### Claim 18 (depends on 1)

The lubricating oil composition of claim 1, wherein the lubricating oil composition has a bearing weight loss of less than 25, as measured by ASTM D6709.

### Claim 19 (depends on 1)

A method of improving bearing weight loss of a lubricating oil in an engine, the method comprising adding to the engine the lubricating oil composition of claim 1.

### Claim 20 (depends on 19)

The method of claim 19, wherein the amount of the one or more ester(s) of a polyhydric alcohol is less than 0.40 wt. %, based on the total weight of the lubricating oil composition.

### Claim 21 (depends on 4)

The lubricating oil composition of claim 4, wherein the glycerol monooleate compound is a mono-ester of oleic acid and glycerol.