# US 10,479,955 B2 · Lubricating grease composition

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- Number: US 10,479,955 B2
- Document ID: US10479955B2
- Status: Granted
- Kind: B2
- Application number: 15/711,060
- Filed: 2017-09-21
- Published: 2018-01-18
- Granted: 2019-11-19
- Earliest claimed: 2015-03-27
- Assignees: Nok Klueber Co., Ltd.
- Applicants: Nok Klueber Co. Ltd.
- Inventors: Wataru Sawaguchi; Motoyuki Inai; Akira Shinozaki
- Web page: https://patentgrep.com/patent/US10479955B2

## 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 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 147/02: Monomer containing carbon, hydrogen and halogen only
- C10M 169/02: Mixtures of base-materials and thickeners
- C10M 169/06: Mixtures of thickeners and additives
- C10M 117/00: Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M 2205/0225: used as base material
- C10M 2205/0285: used as base material
- C10M 2207/106: used as thickening agents
- C10M 2207/1256: used as thickening agent
- C10M 2209/1023: used as base material
- C10M 2213/062: Polytetrafluoroethylene [PTFE]
- C10M 2215/065: Phenyl-Naphthyl amines
- C10M 2219/044: Sulfonic acids, Derivatives thereof, e.g. neutral salts
- C10M 2223/045: Metal containing thio derivatives
- C10N 2010/02: Groups 1 or 11
- C10N 2010/04: Groups 2 or 12
- C10N 2020/02: Viscosity; Viscosity index
- 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

A lubricating grease composition for a resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with an other member. The lubricating grease composition for a resin member contains a base oil which is a mixed oil of a poly-α-olefin having a kinetic viscosity at 40° C. of 18 to 50 mm2/s and an ethylene-α-olefin copolymer having a number average molecular weight of 40,000 to 200,000, a lithium-based complex soap as a thickener and a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition, wherein the base oil has a kinetic viscosity at 40° C. of 80 to 200 mm2/s and a worked penetration of the lubricating grease composition ranges from 265 to 340.

## Claims

### Claim 1

A lubricating grease composition for a resin member used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with another member, wherein the lubricating grease composition for a resin member contains
a base oil which consists of a mixed oil of: a poly-α-olefin having a kinetic viscosity at 40° C. of 18 to 30 mm2/s, and an ethylene-α-olefin copolymer having a number average molecular weight of 40,000 to 200,000,
a lithium-based complex soap as a thickener, and
a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition,
wherein the base oil, which is the mixed oil of the poly-α-olefin and the ethylene-α-olefin copolymer, has a kinetic viscosity at 40° C. of 80 to 200 mm2/s, and
a worked penetration of the lubricating grease composition ranges from 295 to 340.

### Claim 2 (depends on 1)

The lubricating grease composition for a resin member according to claim 1, wherein the ethylene-α-olefin copolymer has a mixing ratio ranging from 1.5 to 3.5 mass % to the entire lubricating grease composition.

### Claim 3 (depends on 1)

The lubricating grease composition for a resin member according to claim 1, wherein a material of the resin member is a polyamide resin.

### Claim 4 (depends on 1)

The lubricating grease composition for a resin member according to claim 1, wherein the other member is a metal member.