# US 10,767,133 B2 · Protected mercaptophenols and thiophenols for lubricating compositions

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- Number: US 10,767,133 B2
- Document ID: US10767133B2
- Status: Granted
- Kind: B2
- Application number: 16/062,645
- Filed: 2016-12-07
- Published: 2018-12-27
- Granted: 2020-09-08
- Earliest claimed: 2015-12-17
- Assignees: The Lubrizol Corporation
- Applicants: The Lubrizol Corporation
- Inventors: Robert D. Dura
- Web page: https://patentgrep.com/patent/US10767133B2

## CPC

- C10M 135/30: containing hydroxy groups; Derivatives thereof
- C10M 101/02: Petroleum fractions
- C10M 107/02: Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
- C10M 159/22: containing phenol radicals
- C10M 2203/1025: used as base material
- C10M 2205/06: containing conjugated dienes
- C10M 2207/026: with tertiary alkyl groups
- C10M 2207/028: Overbased salts thereof
- C10M 2207/262: derived from hydroxy substituted aromatic acids, e.g. salicylates
- C10M 2215/064: Di- and triaryl amines
- C10M 2215/28: Amides; Imides
- C10M 2219/044: Sulfonic acids, Derivatives thereof, e.g. neutral salts
- C10M 2219/046: Overbased sulfonic acid salts
- C10M 2219/087: containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M 2219/088: Neutral salts
- C10M 2219/089: Overbased salts
- C10M 2223/045: Metal containing thio derivatives
- C10N 2010/02: Groups 1 or 11
- C10N 2010/04: Groups 2 or 12
- C10N 2010/08: Groups 4 or 14
- C10N 2030/02: Pour-point; Viscosity index
- C10N 2030/04: Detergent property or dispersant property
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2030/08: Resistance to extreme temperature
- C10N 2030/10: Inhibition of oxidation, e.g. anti-oxidants
- C10N 2030/43: {Sulfur free or low sulfur content compositions}
- C10N 2030/45: {Ash-less or low ash content}
- C10N 2030/52: {Base number [TBN]}
- C10N 2040/04: Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N 2040/042: {for automatic transmissions}
- C10N 2040/044: {for manual transmissions}
- C10N 2040/046: {for traction drives}
- C10N 2040/25: Internal-combustion engines
- C10N 2040/252: {Diesel engines}
- 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 composition includes an oil of lubricating viscosity and a compound comprising a protected mercaptophenol. The protected mercaptophenol includes a mercapto group in which the hydrogen is substituted with a substituent of at least 5 carbons. The substituent is selected from hydroxy-substituted hydrocarbyl groups, poly(ether) groups, hydrocarbyl groups, and mixtures and salts thereof.

## Claims

### Claim 1

A lubricating composition comprising:
at least 10 wt. % of an oil of lubricating viscosity comprising at least one of an API Group I, Group II, Group III, Group IV, and Group V base oil; and
at least 0.01 wt. % of a compound comprising a protected mercaptophenol represented by the salt form of Formula I:
where R1 is a poly(ether) group;
n is 1;
x is 0, and
a cation selected from metal cations and pnictogen cations, the pnictogen cations being cations comprising elements in column 15 of the periodic table.

### Claim 2 (depends on 1)

The lubricating composition of claim 1, wherein the compound has a weight average molecular weight of at least 223 in its unsalted form.

### Claim 3 (depends on 1)

The lubricating composition of claim 1, wherein the compound is at least 0.1 wt. % to 20 wt. % of the lubricating composition.

### Claim 4 (depends on 1)

The lubricating composition of claim 1, wherein the oil of lubricating viscosity is at least 20 wt. % to 95 wt. % of the lubricating composition.

### Claim 5 (depends on 1)

The lubricating composition of claim 1, further comprising at least one of the group consisting of additional detergents, antioxidants, dispersants, antiwear agents, friction modifiers, and combinations thereof.

### Claim 6 (depends on 1)

The lubricating composition of claim 1, wherein the lubricating composition has a SAE viscosity grade of XW-Y, wherein X is selected from 0, 5, 10 and 15; and Y is selected from 16, 20, 30, or 40.

### Claim 7

A method of lubricating a mechanical device comprising supplying to the device a lubricating composition having
at least 10 wt. % of an oil of lubricating viscosity comprising at least one of an API Group I, Group II, Group III, Group IV, and Group V base oil; and
at least 0.01 wt. % of a compound comprising a protected mercaptophenol represented by the salt form of Formula I:
where R1 is a poly(ether) group;
wherein the poly(ether) group is of the form —(CH2CHR4—O)mR5, wherein each R4 is independently selected from H and an alkyl group which has no heteroatoms, and each R5 is independently selected from hydrogen and an alkyl group which has no heteroatoms, and m is at least 1;
n is 1;
x is 0, and
a cation selected from metal cations and pnictogen cations, the pnictogen cations being cations comprising elements in column 15 of the periodic table.