# US 8,772,531 B2 · Neopentyl glycol diester

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- Number: US 8,772,531 B2
- Document ID: US8772531B2
- Status: Granted
- Kind: B2
- Application number: 13/813,718
- Filed: 2011-06-30
- Published: 2013-09-05
- Granted: 2014-07-08
- Earliest claimed: 2010-08-24
- Assignees: KH Neochem Co., Ltd.
- Applicants: Toshihiro Inayama; Satoshi Hiyoshi; Junya Kishi; Masato Kujime
- Inventors: Toshihiro Inayama; Satoshi Hiyoshi; Junya Kishi; Masato Kujime
- Web page: https://patentgrep.com/patent/US8772531B2

## CPC

- C10M 129/70: of monocarboxylic acids
- C07C 67/08: by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
- C07C 69/28: esterified with dihydroxylic compounds
- C10M 105/38: of polyhydroxy compounds
- C10M 171/008: {Lubricant compositions compatible with refrigerants}
- C10M 2207/2835: used as base material
- C10N 2020/02: Viscosity; Viscosity index
- C10N 2020/071: {Branched chain compounds}
- C10N 2020/101: {Containing Hydrofluorocarbons}
- C10N 2030/02: Pour-point; Viscosity index
- C10N 2030/10: Inhibition of oxidation, e.g. anti-oxidants
- C10N 2030/70: {Soluble oils}
- C10N 2040/02: Bearings
- C10N 2040/25: Internal-combustion engines
- C10N 2040/30: Refrigerators lubricants {or compressors lubricants}
- 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)
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

A neopentyl glycol diester which is a mixed ester of neopentyl glycol and carboxylic acids is provided, wherein the carboxylic acids consisting of isobutyric acid as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid. The neopentyl glycol diester may be used in a refrigerant oil or the like which exhibits excellent miscibility with a difluoromethane refrigerant among other properties.

## Claims

### Claim 1

A neopentyl glycol diester that is a mixed ester of neopentyl glycol and carboxylic acids, the carboxylic acids consisting of isobutyric acid, as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid.

### Claim 2 (depends on 1)

The neopentyl glycol diester according to claim 1, wherein the molar ratio of isobutyric acid to 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid (isobutyric acid/2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid ratio) in the carboxylic acids is 10/90 to 75/25.

### Claim 3 (depends on 1)

The neopentyl glycol diester according to claim 1, wherein the molar ratio of isobutyric acid to 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid (isobutyric acid/2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid ratio) in the carboxylic acids is 26/74 to 75/25.

### Claim 4 (depends on 2)

The neopentyl glycol diester according to claim 2, wherein the molar ratio of isobutyric acid to 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid (isobutyric acid/2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid ratio) in the carboxylic acids is 26/74 to 75/25.

### Claim 5 (depends on 2)

The neopentyl glycol diester according to claim 2, wherein the carboxylic acids consist of isobutyric acid as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid.

### Claim 6 (depends on 3)

The neopentyl glycol diester according to claim 3, wherein the carboxylic acids consist of isobutyric acid as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid.

### Claim 7 (depends on 4)

The neopentyl glycol diester according to claim 4, wherein the carboxylic acids consist of isobutyric acid as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid.