# US 5,705,459 A · Process for the production of polyol ester and ester-containing lubricating oil

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- Number: US 5,705,459 A
- Document ID: US5705459A
- Status: Granted
- Kind: A
- Application number: 08/578,994
- Filed: 1995-12-27
- Granted: 1998-01-06
- Earliest claimed: 1994-12-27
- Assignees: Mitsubishi Gas Chemical Company, Inc.
- Inventors: Yoshihiro Shiokawa; Shunichi Matsumoto; Yoshifumi Sato; Kinji Kato; Mitsuharu Kitamura
- Web page: https://patentgrep.com/patent/US5705459A

## CPC

- C10M 105/38: of polyhydroxy compounds
- C10M 171/008: {Lubricant compositions compatible with refrigerants}
- C10M 2207/281: of (cyclo)aliphatic monocarboxylic acids
- C10M 2207/282: of (cyclo)aliphatic oolycarboxylic acids
- C10M 2207/283: of polyhydroxy compounds
- C10M 2207/286: of polymerised unsaturated acids
- C10M 2211/022: aliphatic
- C10M 2211/06: Perfluorinated compounds
- 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 process for the production of a high-performance hybrid polyol ester having excellent compatibility with hydrofluorocarbons which are regarded as the most likely refrigerant and having excellent resistance to hydrolysis which esters are liable to undergo, the polyol ester having a plurality of branched fatty acid residues at least one of which has a different number of carbon atoms from that of the other branched fatty acid residue or those of the other branched fatty acid residues, the process comprising reacting at least two kinds of olefins having different numbers of carbon atoms, carbon monoxide and a polyhydric alcohol in the presence of hydrogen fluoride.

## Claims

### Claim 1

An ester-containing lubricating oil containing, as a base oil, a mixture of polyol esters having a plurality of fatty acid residues in which alkyl groups bonding to carbonyl groups are derived from butene and octane and are linear and atoms in .alpha.-positions relative to the carbonyl groups are secondary and/or tertiary carbon atoms.

### Claim 2 (depends on 1)

An ester-containing lubricating oil according to claim 1, wherein the mixture contains polyol esters of the general formula (I), ##STR2## wherein each of R.sup.1 to R.sup.4 is an alkyl group derived from butene or octene, and all of carbons in a-positions relative to carbonyl groups are secondary or tertiary carbon atoms, each branched chain being a linear alkyl group or hydrogen,
the mixture containing 1 not more than 2% by weight of a polyol ester of the general formula (I) in which each of R.sup.1 to R.sup.4 is an alkyl group having 4 carbon atoms, 2 10 to 20% by weight of a polyol ester of the general formula (I) in which each of R.sup.1 to R.sup.3 is an alkyl group having 4 carbon atoms and R.sup.4 is an alkyl group having 8 carbon atoms, 3 25 to 37% by weight of a polyol ester of the general formula (I) in which each of R.sup.1 and R.sup.2 is an alkyl group having 4 carbon atoms and each of R.sup.3 and R.sup.4 is an alkyl group having 8 carbon atoms, 4 29 to 40% by weight of a polyol ester of the general formula (I) in which R.sup.1 is an alkyl group having 4 carbon atoms and each of R.sup.2 to R.sup.4 is an alkyl group having 8 carbon atoms and 5 10 to 20% by weight of a polyol ester of the general formula (I) in which each of R.sup.1 to R.sup.4 is an alkyl group having 8 carbon atoms.

### Claim 3 (depends on 2)

An ester-containing lubricating oil according to claim 2, wherein the mixture containing polyol esters of the general formula (I) is a product obtained by reacting pentaerythritol with a mixture of branched fatty acid fluorides formed from butene, octene, carbon monoxide and hydrogen fluoride.