Refrigerating machine oil, and composition for refrigerating machine

Patent metadata

Field	Value
Publication number	US-11015138-B2
Application number	US-201716318432-A
Country	US
Kind code	B2
Filing date	Dec 19, 2017
Priority date	Dec 20, 2016
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

The present invention relates to a refrigerator oil containing a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof in an amount of 30 mol % or more and 100 mol % or less on a basis of 100 mol % of the whole amount of structural units excluding a terminal structural unit in a molecular structure thereof, a refrigerator oil composition containing the refrigerator oil, and a production method of the refrigerator oil.

First claim

The invention claimed is:

1. A refrigerator oil, comprising:
(A) a polyvinyl ether-based compound (A) comprising:
a structural unit (a1) represented by formula (1),

wherein:
R 1 , R 2 , and R 3 each independently represent a hydrogen atom or a hydrocarbon group having 1 or more and 8 or less carbon atoms;
R 4 represents a divalent hydrocarbon group having 3 or more and 10 or less carbon atoms; and
m represents a number of 0 or more and 10 or less;
and
a structural unit (a2) represented by formula (2)

wherein:
R 5 , R 6 , and R 7 each independently represent a hydrogen atom or a hydrocarbon group having 1 or more and 8 or less carbon atoms;
R 8 represents a divalent hydrocarbon group having 2 or more and 10 or less carbon atoms; n represents a number of 0 or more and 10 or less; and
R 9 represents a hydrocarbon group having 2 or more and 10 or less carbon atoms,
wherein a molar content ratio [(a1)/(a2)] is from 30/70 to 95/5 on a basis of 100 mol % of the whole amount of structural units excluding a terminal structural unit in a molecular structure thereof.

2. The refrigerator oil according to claim 1 , wherein the content of the component (A) is 70.0% by mass or more and 100% by mass or less on a basis of 100% by mass of the whole amount of the refrigerator oil.

3. The refrigerator oil according to claim 1 , further comprising:
(B) an antioxidant (B).

4. The refrigerator oil according to claim 3 , wherein the antioxidant (B) is contained in an amount of 0.1% by mass or more and 5.0% by mass or less on a basis of 100% by mass of the whole amount of the refrigerator oil.

5. The refrigerator oil according to claim 1 , further comprising:
(C) an acid scavenger (C).

6. The refrigerator oil according to claim 5 , wherein the acid scavenger (C) is contained in an amount of 0.1% by mass or more and 10.0% by mass or less on a basis of 100% by mass of the whole amount of the refrigerator oil.

7. The refrigerator oil according to claim 1 , further comprising:
(D) an extreme pressure agent (D).

8. The refrigerator oil according to claim 7 , wherein the extreme pressure agent (D) is contained in an amount of 0.1% by mass or more and 5.0% by mass or less on a basis of 100% by mass of the whole amount of the refrigerator oil.

9. The refrigerator oil according to claim 1 , wherein the structural unit (a1) is a structural unit (a1-2) represented by formula (1-2):

10. A refrigerator oil composition, comprising the refrigerator oil of claim 1 and a refrigerant.

11. The refrigerator oil composition according to claim 10 , wherein the refrigerant is a refrigerant containing at least one selected from the group consisting of a fluorinated hydrocarbon, a hydrocarbon-based refrigerant, carbon dioxide, and ammonia.

12. The refrigerator oil composition according to claim 10 , wherein the refrigerant is a refrigerant comprising difluoromethane (R32).

13. A method of producing a refrigerator oil composition, the method comprising contacting a polyvinyl ether-based compound (A with a refrigerant to obtain a refrigerator oil composition: wherein the polyvinyl ether-based compound comprises a structural unit (a1) represented by formula (1),

wherein:
R 1 , R 2 , and R 3 each independently represent a hydrogen atom or a hydrocarbon group having 1 or more and 8 or less carbon atoms;
R 4 represents a divalent hydrocarbon group having 3 or more and 10 or less carbon atoms; and
m represents a number of 0 or more and 10 or less; and a structural unit (a2) represented by formula (2):

wherein
R 5 , R 6 , and R 7 each independently represent a hydrogen atom or a hydrocarbon group having 1 or more and 8 or less carbon atoms;
R 8 represents a divalent hydrocarbon group having 2 or more and 10 or less carbon atoms; n represents a number of 0 or more and 10 or less; and
R 9 represents a hydrocarbon group having 2 or more and 10 or less carbon atoms,
wherein a molar content ratio [(a1)/(a2)] is from 30/70 to 95/5 on a basis of 100 mol % of the whole amount of structural units excluding a terminal structural unit in a molecular structure thereof.

Assignees

• Idemitsu Kosan Co

Inventors

• Nakajima So
• Matsumoto Tomoya

Classifications

• C08F216/18

  Acyclic compounds · CPC title

• C08F216/1416 Primary

  Monomers containing oxygen in addition to the ether oxygen, e.g. allyl glycidyl ether · CPC title

• C09K5/04

  the change of state being from liquid to vapour or vice versa · CPC title

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2020/097

  Refrigerants · CPC title