# US 10,865,357 B2 · Lubricating oil composition with improved oxidation retention and reduced sludge and varnish formation

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- Number: US 10,865,357 B2
- Document ID: US10865357B2
- Status: Granted
- Kind: B2
- Application number: 15/875,284
- Filed: 2018-01-19
- Published: 2018-07-26
- Granted: 2020-12-15
- Earliest claimed: 2017-01-23
- Assignees: Phillips 66 Company
- Applicants: Phillips 66 Company
- Inventors: Gregory S. Hutchison
- Web page: https://patentgrep.com/patent/US10865357B2

## CPC

- C10M 133/44: Five-membered ring containing nitrogen and carbon only
- C10M 141/06: at least one of them being an organic nitrogen-containing compound
- C10M 101/00: Lubricating compositions characterised by the base-material being a mineral or fatty oil (containing more than 10% water C10M173/00)
- C10M 133/02: having a carbon chain of less than 30 atoms
- C10M 169/04: Mixtures of base-materials and additives
- C10M 133/12: having amino groups bound to a carbon atom of a six-membered aromatic ring
- C10M 2203/003: used as base material
- C10M 2203/1006: used as base material
- C10M 2203/1025: used as base material
- C10M 2205/028: containing aliphatic monomers having more than four carbon atoms
- C10M 2205/0285: used as base material
- C10M 2215/065: Phenyl-Naphthyl amines
- C10M 2215/223: Five-membered rings containing nitrogen and carbon only
- C10M 2215/26: Amines
- C10M 2215/30: Heterocyclic compounds
- 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 2030/12: Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
- C10N 2040/135: {Steam engines or turbines}
- 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 composition comprising: an oil of lubricating viscosity; an alkylated phenyl-α-naphthyl amine; and at least one oil soluble triazole or derivatives thereof. Wherein the oil soluble triazole or derivatives thereof comprises at least one oil soluble diphenylamine tolutriazole reaction product.

## Claims

### Claim 1

A composition comprising:
a combination of at least two oils of lubricating viscosity selected from API Group II, III, IV or V base stocks and mixtures thereof;
an alkylated phenyl-α-naphthyl amine having an alkyl group from about 8 to about 12 carbon atoms and being present in an amount from about 0.1 wt% to about 0.7 wt%; and
at least one oil soluble triazole or derivatives thereof, present in the amount from about 0.05 wt% to about 0.5 wt%,
wherein the oil soluble triazole or derivatives thereof comprises at least one oil soluble diphenylamine tolutriazole reaction product,
and at least one sheared antifoam solution wherein the sheared antifoam solution has a mean particles size from about 0.01 microns to about 0.5 microns.

### Claim 2 (depends on 1)

The composition of claim 1, having a residual RPVOT of 25% after at least 1,000 hours in a Dry TOST test at 120° C.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the alkylated phenyl-a-naphthyl amine is present in the range from about 0.2 wt% to about 0.6 wt%.

### Claim 4 (depends on 1)

The composition of claim 1, further comprising an additive selected from a rust inhibitor, pour point depressant, demulsifier, diluent oil, defoamer, antifoam agents, dispersants, detergents, diluent oil, succinated polyolefins, viscosity modifiers, antistatic agents, antirust agents, extreme pressure/antiwear agents, and seal swell agents and combinations thereof.

### Claim 5 (depends on 1)

The composition of claim 1 having less than 65 mg/Kg of sludge after at least 1,000 hours test duration in a Dry TOST test at 120° C.

### Claim 6 (depends on 1)

The composition of claim 1, wherein the composition is used to lubricate a turbine.