# US 5,348,676 A · Lubricating oil composition for food processing machineries

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- Number: US 5,348,676 A
- Document ID: US5348676A
- Status: Granted
- Kind: A
- Application number: 08/067,326
- Filed: 1993-05-25
- Granted: 1994-09-20
- Earliest claimed: 1992-05-25
- Assignees: Nippon Oil Co., Ltd.
- Inventors: Hiroyuki Takashima; Mitsuo Okada; Teruo Shimizu
- Web page: https://patentgrep.com/patent/US5348676A

## CPC

- C10M 105/38: of polyhydroxy compounds
- C10M 2207/026: with tertiary alkyl groups
- C10M 2207/046: Hydroxy ethers
- C10M 2207/125: having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M 2207/129: having hydrocarbon chains of thirty or more carbon atoms
- C10M 2207/281: of (cyclo)aliphatic monocarboxylic acids
- C10M 2207/282: of (cyclo)aliphatic oolycarboxylic acids
- C10M 2207/283: of polyhydroxy compounds
- C10M 2207/2835: used as base material
- C10M 2207/286: of polymerised unsaturated acids
- C10M 2207/289: containing free hydroxy groups
- C10N 2040/00: Specified use or application for which the lubricating composition is intended
- C10N 2040/30: Refrigerators lubricants {or compressors lubricants}
- C10N 2040/32: Wires, ropes or cables lubricants
- C10N 2040/34: Lubricating-sealants
- C10N 2040/36: Release agents {or mold release agents}
- C10N 2040/38: {Conveyors or chain belts}
- C10N 2040/40: {Generators or electric motors in oil or gas winning field}
- C10N 2040/42: {Flashing oils or marking oils}
- C10N 2040/44: {Super vacuum or supercritical use}
- C10N 2040/50: {Medical uses}
- 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 oil composition comprises a mixture of a first ester of medium-chain saturated fatty acid and glycerol and a second ester of sucrose and carboxylic acid. The composition has improved physical characteristics including high hygienic safety, increased oxidative stability, enhanced lubricating performance, adequate viscosity and other properties required for lubricating particularly food processing machineries and implements.

## Claims

### Claim 1

A lubricating oil composition useful for lubricating food processing machineries and implements comprising a mixture of (a) a first ester of glycerol and a medium-chain saturated fatty acid, where the medium-chain saturated fatty acid has carbon number of 6-10, and (b) a second ester of sucrose and a carboxylic acid, where the carboxylic acid has a carbon number of 2-12.

### Claim 2 (depends on 1)

A lubricating oil composition according to claim 1 wherein said medium-chain saturated fatty acid is selected from the group consisting of caproic acid, heptylic acid, caprylic acid, nonylic acid and captic acid.

### Claim 3 (depends on 1)

A lubricating oil composition according to claim 1 wherein said carboxylic acid is selected from the group consisting of acetic acid, propionic acid, butyric acid, isobutyric acid, caproic acid and isocaproic acid.

### Claim 4 (depends on 1)

A lubricating oil composition according to claim 1 wherein said first ester is present in an amount of 20-95 percent by weight based on the total composition.

### Claim 5 (depends on 1)

A lubricating oil composition according to claim 1 wherein said second ester is present in an amount of 5-80 percent by weight based on the total composition.