# US 11,028,335 B2 · Grease composition, method for manufacturing grease composition, and method for using grease composition

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- Number: US 11,028,335 B2
- Document ID: US11028335B2
- Status: Granted
- Kind: B2
- Application number: 16/469,302
- Filed: 2018-01-17
- Published: 2019-10-03
- Granted: 2021-06-08
- Earliest claimed: 2017-01-18
- Assignees: Idemitsu Kosan Co., Ltd.
- Applicants: Idemitsu Kosan Co., Ltd.
- Inventors: Akihiro Shishikura; Tomonobu Takada; Hiroki Sekiguchi; Asami Koga; Go Watanabe; Harutomo Ikeda
- Web page: https://patentgrep.com/patent/US11028335B2

## CPC

- C10M 169/00: Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M 169/06: Mixtures of thickeners and additives
- C10M 101/02: Petroleum fractions
- C10M 117/02: having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
- C10M 117/06: having more than one carboxyl group bound to an acyclic carbon atom or cycloaliphatic carbon atom
- C10M 125/10: Metal oxides, hydroxides, carbonates or bicarbonates
- C10M 129/08: containing at least 2 hydroxy groups
- C10M 133/42: Triazines
- C10M 135/06: Esters, e.g. fats
- C10M 141/06: at least one of them being an organic nitrogen-containing compound
- C10M 2201/062: Oxides; Hydroxides; Carbonates or bicarbonates
- C10M 2203/1006: used as base material
- C10M 2203/1025: used as base material
- C10M 2203/1085: used as base material
- C10M 2207/022: containing at least two hydroxy groups
- C10M 2207/1236: used as thickening agent
- C10M 2207/1265: used as thickening agent
- C10M 2207/1285: used as thickening agents
- C10M 2215/222: Triazines
- C10M 2215/30: Heterocyclic compounds
- C10M 2219/024: of esters, e.g. fats
- C10M 2223/045: Metal containing thio derivatives
- C10N 2020/02: Viscosity; Viscosity index
- C10N 2020/04: Molecular weight; Molecular weight distribution
- C10N 2020/06: Particles of special shape or size
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2030/40: {Low content or no content compositions}
- C10N 2030/43: {Sulfur free or low sulfur content compositions}
- C10N 2030/50: {Emission or smoke controlling properties}
- C10N 2040/24: without essential removal of material {, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding}; Punching metal
- C10N 2040/242: {Hot working}
- C10N 2040/246: {Iron or steel}
- C10N 2050/10: semi-solid; greasy
- 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

Provided is a grease composition which is excellent in fire extinguishing performance without water and can suppress fuming, malodor, and liquefaction on burning and a method for producing the grease composition. A grease composition contains a base oil (A), a thickener (B), and a fire retardant (C), wherein the base oil (A) contains a base oil (A1) having a 40° C. kinematic viscosity of 300 mm2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher, the fire retardant (C) is at least one of aluminum hydroxide (C1) and 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), and a content of the fire retardant (C) is 1.0 to 12.0 mass % based on a total amount of the grease composition.

## Claims

### Claim 1

A grease composition comprising:
a base oil (A),
a thickener (B), and
a fire retardant (C),
wherein
the base oil (A) comprises a base oil (A1) having a 40° C. kinematic viscosity of 300 mm2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher,
the fire retardant (C) comprises aluminum hydroxide (C1), 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), or a combination thereof,
a content of the fire retardant (C) is from 1.0 to 12.0 mass % based on a total amount of the grease composition, and
a water content of the grease composition is less than 1.0 mass % based on the total amount of the grease composition.

### Claim 2 (depends on 1)

The grease composition according to claim 1, wherein a content of the base oil (A1) is 80 mass % or more based on a total amount of the base oil (A).

### Claim 3 (depends on 2)

The grease composition according to claim 2, wherein the base oil (A1) has a 40° C. kinematic viscosity of from 300 to 1,000 mm2/s.

### Claim 4 (depends on 1)

The grease composition according to claim 1, wherein the base oil (A1) is a bright stock.

### Claim 5 (depends on 1)

The grease composition according to claim 1, wherein the thickener (B) is a soap-based thickener.

### Claim 6 (depends on 1)

The grease composition according to claim 1, wherein the aluminum hydroxide (C1) has an average particle diameter of 5.0 μm or less.

### Claim 7 (depends on 1)

The grease composition according to claim 1, further comprising at least one retardant promotor (D) selected from the group consisting of zinc carbonate (D1), polyhydric alcohol (D2), and sulfurized fats or fatty oils (D3).

### Claim 8 (depends on 1)

The grease composition according to claim 1, wherein the sulfur content of the grease composition is less than 2.0 mass % based on the total amount of the grease composition.

### Claim 9 (depends on 1)

A grease composition for steel manufacturing equipment, forging equipment, or a heat treatment apparatus, comprising the grease composition according to claim 1.

### Claim 10

A method for producing a grease composition, comprising:
mixing a base oil (A) comprising a base oil (A1) having a 40° C. kinematic viscosity of 300 mm2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher, with a thickener (B) to form a grease; and
mixing the grease with aluminum hydroxide (C1), 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), or a combination thereof, as a fire retardant (C), after the mixing the base oil (A) and the thickener (B), to obtain a grease composition in which a content of the fire retardant (C) is from 1.0 to 12.0 mass % based on a total amount of the grease composition,
wherein a water content of the grease composition is less than 1.0 mass % based on the total amount of the grease composition.

### Claim 11 (depends on 1)

A process, comprising applying the grease composition of claim 1 as a grease composition in lubricating steel manufacturing equipment, a forging equipment, or a heat treatment apparatus.

### Claim 12 (depends on 1)

The grease composition according to claim 1, wherein the content of the fire retardant (C) is from 1.0 to 10.0 mass % based on a total amount of the grease composition.