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Refrigerating machine oil composition

A technology for refrigerating machine oil and composition, which can be used in lubricating compositions, refrigerators, compressors, etc., and can solve problems such as reduced sealing or lubricity

Inactive Publication Date: 2009-04-01
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the viscosity is further reduced, problems such as a decrease in sealing performance or lubricity occur

Method used

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  • Refrigerating machine oil composition
  • Refrigerating machine oil composition
  • Refrigerating machine oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-16 and comparative example 1、2

[0154] The refrigerating machine oil compositions with the compositions shown in Table 1 were prepared, and the wear load thereof was measured, and the sealed tube test was carried out simultaneously. The results are shown in Table 1.

[0155] [Table 1]

[0156]

[0157] [Table 2]

[0158] Table 1-2

[0159]

[0160] [Note]

[0161] A1: naphthenic mineral oil, kinematic viscosity at 40°C = 0.98mm 2 / s, S minutes=25 mass ppm, flash point=45°C, average molecular weight=120, molecular weight distribution=1.1

[0162] A2: Paraffinic mineral oil, kinematic viscosity at 40°C = 2.24mm 2 / s, S minutes = 1 mass ppm or less, flash point = 78°C, average molecular weight = 170, molecular weight distribution = 1.1

[0163] A3:C 4 Oligomer of olefin (main component isobutylene), kinematic viscosity at 40°C = 1.25mm 2 / s, flash point=49°C, average molecular weight=142, molecular weight distribution=1.2

[0164] A4: C 4 Oligomers of olefins (main component isobutylene), kinemati...

Embodiment 17、18 and comparative example 3、4

[0184] The wear load of the test oils shown in Table 2 was measured, and at the same time, the amount of oil deposition was measured. The results are shown in Table 2.

[0185] [table 3]

[0186] Table 2

[0187]

[0188] [Note]

[0189] C3: naphthenic mineral oil, kinematic viscosity at 40°C = 4.2mm 2 / s, S minutes=20 mass ppm, flash point=145°C, average molecular weight=310, molecular weight distribution=1.2

[0190] C4: dimer of 1-decene, kinematic viscosity at 40°C = 4.9mm 2 / s, flash point=172°C, average molecular weight=282, molecular weight distribution=1

[0191] Others are the same as Table 1.

[0192] As can be seen from Table 2, the refrigerating machine oil compositions of Examples 17 and 18 containing mixed base oils of the present invention had higher wear loads and higher oil adhesions than Comparative Examples 3 and 4 containing a single base oil.

Embodiment 19-22 and

[0193] Embodiment 19-22 and reference example 1

[0194] With regard to the test oils shown in Table 3, a sealing performance comparison test was performed using the sliding part materials shown in Table 3. The results are shown in Table 3.

[0195] [Table 4]

[0196] table 3

[0197] Example 19 Example 20 Example 21 Example 22 Reference example 1 Test oil No. Test oil 12 Test oil 13 Test oil 13 Test oil 13 Test oil 13 sliding material E1 E2 E3 E4 E5 Leakage

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Abstract

The refrigerating machine oil composition of the invention is characterized by containing a mixed base oil which has a kinematic viscosity at 40 DEG C. of 0.11 to 8 mm2 / s and which is composed of a low-viscosity base oil (A) having a kinematic viscosity at 40 DEG C. of 5 mm2 / s or lower, and a high-viscosity base oil (B) having a kinematic viscosity at 40 DEG C. of 20 to 400 mm2 / s, each of the base oil (A) and (B) being composed of at least one species selected from among a mineral oil, a synthetic hydrocarbon compound, an oxygen-containing compound, and a sulfur-containing compound. The refrigerating machine oil composition exhibits enhanced energy saving performance by virtue of its low viscosity, has excellent sealing performance and load resistance, and can be employed in various refrigeration means, particularly suitably in a closed-type refrigerator.

Description

technical field [0001] The present invention relates to a refrigerating machine oil composition, and more specifically relates to an oil composition which is low in viscosity, can improve energy saving, has good sealing performance and excellent load resistance, and is suitable for use in various refrigerating fields, especially in hermetic refrigerating machines Refrigeration machine oil composition. Background technique [0002] Generally, the structure of a compression refrigerator is: at least a compressor, a condenser, an expansion mechanism (expansion valve, etc.), an evaporator, or a dryer, and a mixed liquid of refrigerant and lubricating oil (refrigerator oil) is Closed system circulation. In the above-mentioned compression refrigerator, it varies depending on the type of device, but usually the compressor is at a high temperature and the cooler is at a low temperature, so the refrigerant and lubricating oil must not undergo phase separation in a wide temperature r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M101/02C10M105/02C10M105/08C10M105/72C10M107/02C10M107/24C10M107/34C09K5/04F25B1/00C10N20/02C10N30/00C10N30/06C10N40/30C10N70/00
CPCC10M2203/045C10M2203/1025C10M2207/0406C10N2230/36C10N2270/00C09K5/042C10M171/02C10N2230/02C10M2203/1065C10N2240/30C10M2219/081C10N2220/306C10M2209/1033C10M2229/025C10M171/008C10M2203/065C10M2203/1006C10N2280/00C10N2220/022C10N2220/302C10M2223/041C10N2220/021C10N2220/303C10M2209/043C10M2207/042C10M2229/02C10M2205/0265C10N2230/43C10N2220/305C10M2207/0203C10M2207/026C10N2230/10C10M2203/0206C10N2230/06C10M2207/085C10N2260/02C10N2020/02C10N2020/04C10N2030/02C10N2030/06C10N2030/10C10N2040/30C10N2060/02C10N2070/00C10N2080/00C10N2020/101C10N2020/103C10N2020/105C10N2020/106C10N2030/36C10N2030/43Y02P20/10C10M2209/1055C10M2209/1085C10M2205/0285C10M101/02C10M105/02
Inventor 金子正人
Owner IDEMITSU KOSAN CO LTD
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