REFRIGERATING MACHINE OIL, AND WORKING FLUID COMPOSITION FOR REFRIGERATING MACHINES

• US 20170218292A1
• Filed: 05/11/2015
• Published: 08/03/2017
• Est. Priority Date: 05/22/2014
• Status: Active Grant

• Current Assignee: ENEOS Corporation (ENEOS Holdings, Inc.)
• Original Assignee: JX Nippon Oil & Energy Corporation (ENEOS Holdings, Inc.)
• Inventors: KONNO, Souichirou
• Granted Patent: US 10,400,191 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 220/14 Methyl esters , e.g. methyl (meth)acrylate
• CPC Class Codes: C08F 220/1802 C2-(meth)acrylate, e.g. ethyl (meth)acrylate
• CPC Class Codes: C08F 220/1803 C3-(meth)acrylate, e.g. (iso)propyl (meth)acrylate
• CPC Class Codes: C08F 220/1804 C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
• CPC Class Codes: C08F 220/1808 C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
• CPC Class Codes: C08F 220/285 and containing a polyether chain in the alcohol moiety
• CPC Class Codes: C09K 5/04 the change of state being from liquid to vapour or vice versa
• CPC Class Codes: C10M 107/28 containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
• CPC Class Codes: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2207/042 Epoxides
• CPC Class Codes: C10M 2207/281 of (cyclo)aliphatic monocarboxylic acids
• CPC Class Codes: C10M 2209/0845 used as base material
• CPC Class Codes: C10M 2223/041 Triaryl phosphates
• CPC Class Codes: C10N 2020/02 Viscosity; Viscosity index
• CPC Class Codes: C10N 2020/04 Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2020/097 Refrigerants
• CPC Class Codes: C10N 2020/101 Containing Hydrofluorocarbons
• CPC Class Codes: C10N 2020/103 Containing Hydrocarbons
• CPC Class Codes: C10N 2020/106 Containing Carbon dioxide
• CPC Class Codes: C10N 2030/02 : Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/06 : Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/08 : Resistance to extreme temperature
• CPC Class Codes: C10N 2030/70 : Soluble oils
• CPC Class Codes: C10N 2040/30 : Refrigerators lubricants or compressors lubricants

Abstract

The present invention provides a refrigerating machine oil comprising, as a base oil, a polymer having a structural unit represented by the following formula (1):

wherein R¹, R² and R³, which may be the same as or different from each other, represent a hydrogen atom or a hydrocarbon group; and R⁴ represents a hydrocarbon group or an organic group containing an oxygen atom, and having a number average molecular weight Mn of 300 or more and 3000 or less and a ratio of a weight-average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) of 1.10 or more and 2.00 or less, and the refrigerating machine oil being used with a refrigerant selected from the group consisting of difluoromethane, a mixture of difluoromethane and pentafluoroethane, a mixture of difluoromethane, pentafluoroethane and 1,1,1,2-tetrafluoroethane, a mixture of pentafluoroethane, 1,1,1,2-tetrafluoroethane and 1,1,1-trifluoroethane, unsaturated hydrofluorocarbons, hydrocarbons and carbon dioxide.

Claims

1. A refrigerating machine oil comprising, as a base oil, a polymer having a structural unit represented by the following formula (1):

2. The refrigerating machine oil according to claim 1, wherein —

OR⁴ in the formula (1) is represented by the following formula (2);

—

O(R⁵O)_mR⁶ 

 

(2)

wherein R⁵ represents a divalent hydrocarbon group or a divalent hydrocarbon group containing an ether-bond oxygen atom;

R⁶ represents a hydrocarbon group; and

m represents an integer of 0 or more;

with the proviso that if m is 2 or more, a plurality of R⁵ may be the same as or different from each other.

3. A working fluid composition for a refrigerating machine comprising:

a refrigerating machine oil comprising, as a base oil, a polymer having a structural unit represented by the following formula (1);

4. The working fluid composition for a refrigerating machine according to claim 3, wherein —

OR⁴ in the formula (1) is represented by the following formula (2);

—

O(R⁵O)_mR⁶ 

 

(2)

wherein R⁵ represents a divalent hydrocarbon group or a divalent hydrocarbon group an ether-bond oxygen atom;

R⁶ represents a hydrocarbon group; and

m represents an integer of 0 or more;

with the proviso that if m is 2 or more, a plurality of R⁵ may be the same as or different from each other.

5-6. -6. (canceled)