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Refrigerator oil and working fluid composition for refrigerator

A technology for working fluids and refrigerators, applied in lubricating compositions, petroleum industry, chemical instruments and methods, etc., can solve the problems of high global warming coefficient and achieve high refrigerant compatibility and thermal and chemical stability

Active Publication Date: 2010-01-06
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the HFC refrigerants, HFC-134a, which is commonly used as a refrigerant for automobile air conditioners, has an ozone destruction coefficient (ODP) of 0, but has a high global warming coefficient (GWP), so it is subject to regulation in Europe

Method used

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  • Refrigerator oil and working fluid composition for refrigerator
  • Refrigerator oil and working fluid composition for refrigerator
  • Refrigerator oil and working fluid composition for refrigerator

Examples

Experimental program
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Embodiment 1～11、 comparative example 1～4

[0091] In Examples 1 to 11 and Comparative Examples 1 to 4, refrigerating machine oils were prepared using base oils 1 to 15 shown below, respectively. Various properties of the obtained refrigerating machine oil are shown in Tables 1-3.

[0092] (base oil)

[0093] Base oil 1: Esters of 2-ethylhexanoic acid and neopentyl glycol

[0094] Base oil 2: Esters of 2-ethylhexanoic acid and trimethylolpropane

[0095] Base oil 3: Esters of 2-ethylhexanoic acid and pentaerythritol

[0096] Base oil 4: Esters of mixed fatty acids of 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid (mixing ratio (molar ratio): 50 / 50) and pentaerythritol

[0097] Base oil 5: Esters of mixed fatty acids of 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid (mixing ratio (molar ratio): 50 / 50) and dipentaerythritol

[0098] Base oil 6: a mixture of base oil 1 and base oil 3 (mixing ratio (mass ratio): base oil 1 / base oil 3 = 35 / 65)

[0099] Base oil 7: a mixture of base oil 1 and base oil 4 (mi...

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Abstract

Disclosed is a refrigerator oil containing an ester of a polyhydric alcohol and a fatty acid containing 50-100% by mole of a fatty acid having 5-9 carbon atoms, not less than 30% by mole of a branched fatty acid having 5-9 carbon atoms, and not more than 40% by mole of a linear fatty acid having 5 or less carbon atoms. This refrigerator oil is characterized by being used together with a fluoropropene refrigerant and / or a trifluoroiodomethane refrigerant. Also disclosed is a working fluid composition for refrigerator, which is characterized by containing the above-mentioned ester, and a fluoropropene refrigerant and / or a trifluoroiodomethane refrigerant.

Description

technical field [0001] The present invention relates to refrigerating machine oil and a working fluid composition for refrigerating machines. Background technique [0002] Due to the depletion of the ozone layer in recent years, CFC (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons), which were previously used as refrigerants for refrigeration equipment, have been restricted, and instead of them, HFCs (hydrofluorocarbons) are being used as refrigerants. . [0003] When CFC and HCFC are used as refrigerants, hydrocarbon oils such as mineral oil and alkylbenzene can be appropriately used as refrigerating machine oils. Compatibility, lubricity, solution viscosity with refrigerant, thermal and chemical stability and other unexpected behaviors, each refrigerant needs to develop refrigeration oil. Therefore, as refrigerating machine oils for HFC refrigerants, for example, polyalkylene glycols (see Patent Document 1), esters (see Patent Document 2), carbonates (see Patent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/38C10N30/00C10N40/30C09K5/04
CPCC09K5/044C09K5/045C09K2205/122C09K2205/126C10M105/38C10M2207/2835C10M171/008C10M2203/1065C10M2209/1055C10N2020/071C10N2020/097C10N2020/099C10N2020/103C10N2020/106C10N2020/101C10N2030/66C10N2030/70C10N2030/12C10N2040/30C10M2209/1085
Inventor 下村裕司泷川克也
Owner NIPPON OIL CO LTD
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