Refrigerator oil composition and refrigerator

Patent metadata

Field	Value
Publication number	US-9834737-B2
Application number	US-201415026346-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Oct 2, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The present invention provides a refrigerating machine oil composition comprising an ester-based base oil, an epoxy compound, and a carbodiimide compound, the refrigerating machine oil composition being used with a refrigerant containing a fluoropropene in a refrigerating machine comprising a member containing polyethylene terephthalate and/or a member containing hydrogenated acrylonitrile butadiene rubber.

First claim

What is claimed is:

1. A refrigerating machine oil composition comprising:
an ester-based base oil;
at least 0.1% by mass, based on the total amount of the refrigerating machine oil composition, of an epoxy compound which is a glycidyl ether-type epoxy compound, glycidyl ester-type epoxy compound, oxirane compound, or alicyclic epoxy compound; and
at least 0.01% by mass, based on the total amount of the refrigerating machine oil composition, of a carbodiimide compound.

2. The refrigerating machine oil composition according to claim 1 , wherein the ester-based base oil comprises an ester of pentaerythritol and a monocarboxylic fatty acid and/or an ester of dipentaerythritol and a monocarboxylic fatty acid.

3. The refrigerating machine oil composition according to claim 1 , wherein the ester-based base oil comprises an ester of pentaerythritol and a mixture of two or more monocarboxylic fatty acids and/or an ester of dipentaerythritol and a mixture of two or more monocarboxylic fatty acids.

4. The refrigerating machine oil composition according to claim 3 , wherein the epoxy compound is glycidyl neodecanoate or 2-ethylhexyl glycidyl ether, and the carbodiimide compound is bis(diisopropylphenyl)carbodiimide or diisopropylcarbodiimide, the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition, and the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.

5. The refrigerating machine oil composition according to claim 1 , wherein the epoxy compound is a glycidyl ether-type epoxy compound, or a glycidyl ester-type epoxy compound.

6. The refrigerating machine oil composition according to claim 5 , wherein the glycidyl ether-type epoxy compound is represented by the following formula (2):

wherein R 2 represents an aryl group or an alkyl group having 5 to 18 carbon atoms.

7. The refrigerating machine oil composition according to claim 5 , wherein the glycidyl ester-type epoxy compound is represented by the following formula (3):

wherein R 3 represents an aryl group, an alkyl group having 5 to 18 carbon atoms, or an alkenyl group.

8. The refrigerating machine oil composition according to claim 1 , wherein the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition.

9. The refrigerating machine oil composition according to claim 1 , wherein the carbodiimide compound is selected from the group consisting of dialkylcarbodiimides and bis(alkylphenyl)carbodiimides.

10. The refrigerating machine oil composition according to claim 1 , wherein the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.

11. A refrigerating machine comprising a refrigerant circulation system containing a compressor, a condenser, an expansion mechanism, and an evaporator,
the refrigerant circulation system comprising a member containing polyethylene terephthalate and/or a member containing hydrogenated acrylonitrile butadiene rubber, and
the refrigerant circulation system being filled with
a refrigerating machine oil composition comprising
an ester-based base oil,
at least 0.1% by mass, based on the total amount of the refrigerating machine oil composition, of an epoxy compound which is a glycidyl ether-type epoxy compound, glycidyl ester-type epoxy compound, oxirane compound, or alicyclic epoxy compound, and
at least 0.01% by mass, based on the total amount of the refrigerating machine oil composition, of a carbodiimide compound, and

a refrigerant containing a fluoropropene.

12. The refrigerating machine according to claim 11 , wherein the epoxy compound is a glycidyl ether-type epoxy compound, or a glycidyl ester-type epoxy compound.

13. The refrigerating machine according to claim 12 , wherein the glycidyl ether-type epoxy compound is represented by the following formula (2):

wherein R 2 represents an aryl group or an alkyl group having 5 to 18 carbon atoms.

14. The refrigerating machine according to claim 12 , wherein the glycidyl ester-type epoxy compound is represented by the following formula (3):

wherein R 3 represents an aryl group, an alkyl group having 5 to 18 carbon atoms, or an alkenyl group.

15. The refrigerating machine according to claim 11 , wherein the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition.

16. The refrigerating machine according to claim 11 , wherein the carbodiimide compound is selected from the group consisting of dialkylcarbodiimides and bis(alkylphenyl)carbodiimides.

17. The refrigerating machine according to claim 11 , wherein the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.

18. The refrigerating machine according to claim 11 , wherein the refrigerant circulation system comprises the member containing hydrogenated acrylonitrile butadiene rubber.

19. The refrigerating machine according to claim 11 , wherein the refrigerant circulation system comprising the member containing polyethylene terephthalate and the member containing hydrogenated acrylonitrile butadiene rubber.

20. The refrigerating machine according to claim 11 , wherein the ester-based base oil comprises an ester of pentaerythritol and a mixture of two or more monocarboxylic fatty acids and/or an ester of dipentaerythritol and a mixture of two or more monocarboxylic fatty acids, the epoxy compound is glycidyl neodecanoate or 2-ethylhexyl glycidyl ether, and the carbodiimide compound is bis(diisopropylphenyl)carbodiimide or diisopropylcarbodiimide, the content of the epoxy compound is 0.1% by mass or more and 4.5% by mass or less based on the total amount of the refrigerating machine oil composition, and the content of the carbodiimide compound is 0.01% by mass or more and 1% by mass or less based on the total amount of the refrigerating machine oil composition.

Assignees

• Jx Nippon Oil & Energy Corp

Inventors

• Takahashi Hitoshi
• Sawada Ken
• Tada Akira
• Konno Souichirou

Classifications

• C10M2207/042

  Epoxides · CPC title

• C10M2207/3045

  used as base material · CPC title

• C10M133/22

  containing a carbon-to-nitrogen double bond, e.g. guanidines, hydrazones, semicarbazones · CPC title

• F25B2500/06

  Damage · CPC title

• C10M129/18

  Epoxides · CPC title