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Refrigerating oil composition

A technology of refrigerating machine oil and composition, which is applied in the direction of lubricating composition, petroleum industry, heat exchange materials, etc., and can solve problems such as pyrolysis, poor hydrolysis stability, insufficient compatibility of refrigerants, insufficient lubricity, etc.

Inactive Publication Date: 2002-08-14
MITSUBISHI OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As an ester-based refrigerating machine oil with high pyrolysis and hydrolysis stability, the alicyclic polycarboxylic acid ester disclosed in JP-A-9-221690 is known. Insufficient compatibility of the agent; if it is low-grade, in addition to poor pyrolysis and hydrolysis stability, there is also the problem of insufficient lubricity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-20 and comparative example 1-13

[0092] The base oils and additives used in Examples and Comparative Examples are as follows. Compounded in the manner shown in Table 1-8, the sample oils of Examples 1-20 and Comparative Examples 1-13 were prepared. The properties and forms (dynamic viscosities at 40°C and 100°C, total acid value) of the obtained sample oils are shown in Tables 1-8.

[0093] Base oil Base oil 1: an ester oil obtained from 4-cyclohexene-1,2-dicarboxylic acid, n-butanol and n-heptanol (ester 1: 15% by mass, ester 5: 5% by mass, ester 7 : 80% by mass) base oil 2: an ester oil obtained from 4-cyclohexene-1,2-dicarboxylic acid, isobutanol, and n-heptanol (ester 2: 26% by mass, ester 6: 2% by mass , ester 7: 72 mass %) base oil 3: the ester oil (ester 3: 13 mass %, Ester 5: 6% by mass, ester 8: 81% by mass) base oil 4: an ester oil obtained from 4-cyclohexene-1,2-dicarboxylic acid, isobutanol, and 2-ethylhexanol 4: 24% by mass, ester 6: 2% by mass, ester 8: 74% by mass) base...

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PUM

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Abstract

A refrigerating machine oil composition which comprises an alicyclic dicarboxylic ester compound having an alicyclic ring and two ester groups which are represented by the following general formula (1): -COOR<1> (1) (wherein R<1> represents C1-18 alkyl) and are bonded respectively to carbon atoms adjacent to each other on the ring, wherein the ester compound is one obtained from, as alcohol ingredients, (a) a C1-5 aliphatic alcohol and (b) a C6-18 aliphatic alcohol.

Description

technical field [0001] The present invention relates to a refrigerating machine oil composition, and more specifically, to a refrigerating machine oil composition characterized by containing an alicyclic dicarboxylic acid ester compound. Background technique [0002] From the viewpoint of ozone depletion and global warming problems in recent years, projects on alternative refrigerants and high-efficiency refrigeration systems are being studied. In terms of refrigerant substitutes, there is a shift from chlorine-containing refrigerants such as CFC (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) to HFCs (hydrofluorocarbons). On the other hand, from the viewpoint of global warming, since HFC refrigerants are also subject to regulation, the application of natural refrigerants such as carbon dioxide, ammonia, and hydrocarbons is also being studied. [0003] In order to comply with this trend of refrigerant substitution, the development of refriger...

Claims

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Application Information

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IPC IPC(8): C09K5/04C10M105/36C10M169/04C10M171/00
CPCC09K5/045C09K2205/24C10N2240/52C10N2240/22C10N2240/58C09K2205/106C10M2207/34C10M105/36C10N2240/30C10M2207/2825C10N2240/60C10M2207/282C10M171/008C10N2240/66C10N2240/50C10M2207/24C10M2207/042C09K5/041C10M2223/00C10M169/04C10M2211/02C10N2240/00C09K2205/12C10N2240/54C10N2240/56C10M2207/2855C10M129/18C10M129/66C10M137/00C10N2040/00C10N2040/30C10N2040/32C10N2040/34C10N2040/36C10N2040/38C10N2040/40C10N2040/42C10N2040/44C10N2040/50C10M105/40
Inventor 下村裕司须田聪平野裕之
Owner MITSUBISHI OIL CO LTD
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