# US 2014/0155306 A1 · Lubricating Grease Based On Perfluoropolyether

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- Number: US 2014/0155306 A1
- Document ID: US20140155306A1
- Status: Published application
- Kind: A1
- Application number: 14/126,470
- Filed: 2012-05-25
- Published: 2014-06-05
- Earliest claimed: 2011-06-17
- Assignees: Klüber Lubrication München KG
- Inventors: Martin Schweigkofler; Martin Schmidt-Amelunxen
- Web page: https://patentgrep.com/patent/US20140155306A1

## CPC

- C10M 131/10: Alcohols; Ethers; Aldehydes; Ketones
- C10M 105/50: containing halogen
- C10M 113/12: Silica
- C10M 125/26: Compounds containing silicon or boron, e.g. silica, sand
- C10M 129/26: Carboxylic acids; Salts thereof
- C10M 169/02: Mixtures of base-materials and thickeners
- C10M 2201/1056: used as thickening agents
- C10M 2213/0606: used as base material
- C10M 2213/0626: used as thickening agents
- C10N 2030/76: {Reduction of noise, shudder, or vibrations}
- C10N 2040/02: Bearings
- C10N 2040/17: {for electric contacts}
- 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 is provided that comprises 90 to 99.45 percent by mass of perfluoropolyethers (PFPE) and 0.5 to 5 percent by mass of fumed silica.

## Claims

### Claim 1

A lubricating grease comprising
90 to 99.45 percent by mass of perfluoropolyether (PFPE) and
0.5 to 5 percent by mass of fumed silica.

### Claim 2 (depends on 1)

The lubricating grease as claimed in claim 1, in which the fluoropolyether is a chemical compound of formula (I):
R1-(O—CF2)v-(O—C2F4)w-(O—C3F6)x-(O—CFCF3)y-(O—CF2CF(CF3))z-O—R2 (I)
where R1 and R2 are identical or different and are selected from —CF3, —C2F5 and —C3F7, v, w, x, y, z are integers from ≧0 to 500.

### Claim 3 (depends on 1)

The lubricating grease as claimed in claim 1, in which the fumed silica is a hydrophilic silica.

### Claim 4 (depends on 1)

The lubricating grease as claimed in claim 1, further comprising 0.05 to 5 percent by mass of an additive selected from the group consisting of anticorrosives.

### Claim 5 (depends on 1)

The lubricating grease as claimed in claim 1, wherein the anticorrosive is selected from the group consisting of functionalized PFPE derivatives, carboxylic acids or metal salts thereof, and PFPE ethoxylates.

### Claim 6 (depends on 1)

The use of the lubricating grease as claimed in claim 1 as an antisqueak agent in the automotive sector.

### Claim 7 (depends on 1)

The use of the lubricating grease as claimed in claim 1 for lubrication in the office and electronics sectors, especially in the case of plastic hinges of monitors/television mounts or clamshell cellphones.