Refrigerating-Machine Oil Composition and Working Fluid Composition Including Same for Refrigerating Machine

• US 20170198236A1
• Filed: 02/06/2015
• Published: 07/13/2017
• Est. Priority Date: 05/30/2014
• Status: Active Application

• Current Assignee: KH Neochem Co., Ltd.
• Original Assignee: KH Neochem Co., Ltd.
• Inventors: Hiyoshi, Satoshi, Kishi, Junya, Kujime, Masato
• Granted Patent: US 10,266,788 B2
• Time in Patent Office: Days
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 2205/22 All components of a mixture being fluoro compounds
• CPC Class Codes: C09K 2205/24 Only one single fluoro component present
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen
• CPC Class Codes: C10M 105/38 of polyhydroxy compounds
• CPC Class Codes: C10M 129/72 of polycarboxylic acids
• CPC Class Codes: C10M 129/74 of polyhydroxy compounds
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• 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 2207/282 of (cyclo)aliphatic oolycarboxylic acids
• CPC Class Codes: C10M 2207/283 of polyhydroxy compounds
• CPC Class Codes: C10M 2207/2835 used as base material
• CPC Class Codes: C10M 2223/041 Triaryl phosphates
• CPC Class Codes: C10N 2020/071 Branched chain compounds
• CPC Class Codes: C10N 2020/101 Containing Hydrofluorocarbons
• 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 2030/70 Soluble oils
• CPC Class Codes: C10N 2040/30 : Refrigerators lubricants or compressors lubricants

Abstract

The present invention provides a refrigerating-machine oil composition which comprises the following ester additive (a) and the following ester base oil (b), the content of the ester additive (a) being 5-45 mass % with respect to the total amount of the refrigerating-machine oil composition. Ester additive (a): At least one ester of isotridecanoic acid with pentaerythritol Ester base oil (b): Polyhydric-alcohol esters comprising esters of two or more aliphatic monocarboxylic acids selected from among C4-9 aliphatic monocarboxylic acids with pentaerythritol.

Claims

1. A refrigerating machine oil composition comprising the following ester additive (a) and the following ester base oil (b), wherein

a content of the ester additive (a) is within a range of 5 to 45% by mass based on a total amount of the refrigerating machine oil composition,

the ester additive (a) is an ester of isotridecanoic acid and pentaerythritol, and

the ester base oil (b) is an ester of a polyhydric alcohol, including esters of pentaerythritol and two or more aliphatic monocarboxylic acids selected from aliphatic monocarboxylic acids having 4 to 9 carbon atoms.

2. A working fluid composition for refrigerating machines, comprising:

the refrigerating machine oil composition according to claim 1; and

a refrigerant including a hydrofluoroolefin.

3. The working fluid composition for refrigerating machines according to claim 2, wherein the refrigerant including a hydrofluoroolefin is 1,3,3,3-tetrafluoropropene (HFO-1234ze) or a refrigerant mixture of 1,3,3,3-tetrafluoropropene (HFO-1234ze) and difluoromethane (HFC-32).