# US 2019/0169522 A1 · Lubricating grease composition

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- Number: US 2019/0169522 A1
- Document ID: US20190169522A1
- Status: Published application
- Kind: A1
- Application number: 16/269,890
- Filed: 2019-02-07
- Published: 2019-06-06
- Earliest claimed: 2016-08-08
- Assignees: Nok Klueber Co., Ltd.
- Applicants: Nok Klueber Co., Ltd.
- Inventors: Wataru SAWAGUCHI; Kohei MATSUMOTO
- Web page: https://patentgrep.com/patent/US20190169522A1

## CPC

- C10M 169/02: Mixtures of base-materials and thickeners
- C10M 101/02: Petroleum fractions
- C10M 107/02: Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
- C10M 117/02: having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
- C10M 125/10: Metal oxides, hydroxides, carbonates or bicarbonates
- C10M 169/06: Mixtures of thickeners and additives
- C10M 105/04: aliphatic
- C10M 117/00: Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M 2201/062: Oxides; Hydroxides; Carbonates or bicarbonates
- C10M 2201/0623: used as base material
- C10M 2207/1206: used as thickening agents
- C10M 2207/1256: used as thickening agent
- C10M 2207/1265: used as thickening agent
- C10M 2207/1285: used as thickening agents
- C10N 2010/02: Groups 1 or 11
- C10N 2010/04: Groups 2 or 12
- C10N 2020/02: Viscosity; Viscosity index
- C10N 2020/06: Particles of special shape or size
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2040/02: Bearings
- 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

The present disclosure is related to provide a lubricating grease composition having a high static friction coefficient while maintaining excellent low-temperature torque characteristics, high-temperature shear stability, and high-temperature oil separation characteristics. A lubricating grease composition of the present disclosure contains a base oil, a thickener, and a solid lubricant, wherein the solid lubricant is calcium carbonate, the amount of the calcium carbonate blended is 1 to 60% by weight based on the total weight of the lubricating grease composition, the calcium carbonate has an average particle diameter of 0.1 to 30 μm, the base oil has a kinematic viscosity of 18 to 300 mm2/s at 40° C., and the lubricating grease composition has a worked penetration of 240 to 320.

## Claims

### Claim 1

A lubricating grease composition comprising:
a base oil;
a Ba complex soap as a thickener; and
a solid lubricant,
characterized in that the solid lubricant is calcium carbonate,
an amount of the calcium carbonate blended is 1 to 60% by weight based on a total weight of the lubricating grease composition,
the calcium carbonate has an average particle diameter of 0.1 to 30 μm,
the base oil has a kinematic viscosity of 18 to 300 mm2/s at 40° C., and
the lubricating grease composition has a worked penetration of 240 to 320.

### Claim 2 (depends on 1)

The lubricating grease composition according to claim 1, wherein the base oil is at least one oil of a mineral oil and a synthetic hydrocarbon oil.

### Claim 3 (depends on 1)

The lubricating grease composition according to claim 1, wherein the lubricating grease composition is used for a sliding portion between resin members or between a resin member and a metal member.

### Claim 4 (depends on 2)

The lubricating grease composition according to claim 2, wherein the lubricating grease composition is used for a sliding portion between resin members or between a resin member and a metal member.