Lubricant base oil, refrigerator oil and working fluid composition for refrigerators

Patent metadata

Field	Value
Publication number	US-9752091-B2
Application number	US-201314416795-A
Country	US
Kind code	B2
Filing date	Jul 25, 2013
Priority date	Jul 26, 2012
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

The lubricating base oil of the present invention comprises an ester synthesized from: a first component that is at least one selected from polyhydric alcohols having 2 to 4 hydroxyl groups; a second component that is at least one selected from polybasic acids having 6 to 12 carbon atoms; and a third component that is at least one selected from monohydric alcohols having 4 to 18 carbon atoms and monocarboxylic acids having 2 to 12 carbon atoms. In addition, the refrigerating machine oil and the working fluid composition for a refrigerating machine of the present invention each comprise the above lubricating base oil.

First claim

The invention claimed is:

1. A working fluid composition for a refrigerating machine oil, comprising:
a refrigerating machine oil comprising a base oil comprising an ester synthesized from:
a first component that is at least one selected from polyhydric alcohols having 2 to 4 hydroxyl groups;
a second component that is at least one selected from polybasic acids having 6 to 12 carbon atoms; and
a third component that is at least one selected from monohydric alcohols having 4 to 18 carbon atoms and monocarboxylic acids having 2 to 12 carbon atoms,
wherein the first component comprises
a first alcohol that is at least one selected from neopentyl glycol, trimethylolpropane and pentaerythritol; and
a second alcohol that is a butanediol, and

a refrigerant comprising at least one selected from hydrofluorocarbons, hydrofluoroolefins, hydrocarbons having 2 to 4 carbon atoms, and carbon dioxide.

2. The working fluid composition according to claim 1 , wherein the first component comprises at least one selected from neopentyl glycol and trimethylolpropane.

3. The working fluid composition according to claim 1 , wherein the second component comprises at least one selected from adipic acid and sebacic acid.

4. The working fluid composition according to claim 1 , wherein the third component comprises at least one selected from monohydric alcohols having 8 to 10 carbon atoms.

5. The working fluid composition according to claim 1 , wherein the refrigerant has a global warming potential of 1000 or less.

6. The working fluid composition according to claim 1 , wherein the refrigerant has a global warming potential of 700 or less.

7. The working fluid composition according to claim 1 , wherein the refrigerant comprises difluoromethane.

8. The working fluid composition according to claim 1 , wherein the refrigerant comprises propane or isobutane.

9. The working fluid composition according to claim 1 , wherein the refrigerant comprises at least one hydrofluoropropene.

Assignees

• Jx Nippon Oil & Energy Corp

Inventors

• Saito Masanori
• Sawada Ken
• Okido Takeshi
• ADEGAWA Kuniko

Classifications

• C10N2020/071

  Branched chain compounds · CPC title

• C10N2020/011

  Cloud point · CPC title

• C10N2030/70

  Soluble oils · CPC title

• C10N2020/103

  Containing Hydrocarbons · CPC title

• C10N2020/106

  Containing Carbon dioxide · CPC title