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Lubricating oil base oil for hydrocarbon refrigerant and lubricating oil composition comprising same

A lubricating oil composition and lubricating oil technology, applied in the direction of lubricating compositions, base materials, organic chemistry, etc., can solve the problems of lubricating oil viscosity reduction, difficulty in reducing the amount, and poor lubricity, and achieve excellent lubricity and return Oily, stable effect

Inactive Publication Date: 2013-03-06
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems when hydrocarbon refrigerants are used
[0004] The first question is about the lubricating oil used for this refrigerant
Since hydrocarbon refrigerants are dissolved in mineral oil and alkylbenzene, which are conventionally used as lubricating oils, the viscosity of the lubricating oils decreases, the lubricity deteriorates, and the cooling capacity of the refrigerants decreases.
[0005] The second issue is the fact that hydrocarbon refrigerants are flammable
However, as mentioned above, since the refrigerant dissolves in the lubricating oil, the cooling capacity decreases, so it is difficult to reduce its amount

Method used

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  • Lubricating oil base oil for hydrocarbon refrigerant and lubricating oil composition comprising same
  • Lubricating oil base oil for hydrocarbon refrigerant and lubricating oil composition comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 520 g of 2-ethylhexanol (manufactured by Kyowa Hakka Chemical Co., Ltd.) and 14.8 g of potassium hydroxide (purity: 95% by mass) as a catalyst were added to a 5 L (liter) autoclave and heated at 100°C It was treated under reduced pressure for 1 hour, and alcoholized while removing water. Next, the temperature of the autoclave was raised to 110° C., and 4176 g of propylene oxide was introduced over 10 hours. After confirming that the pressure in the autoclave was constant and that all the propylene oxide had reacted, the contents were taken out. Synthetic magnesium silicate (キヨ一ワド 600S, manufactured by Kyowa Hakka Chemical Industry Co., Ltd.) was added to the content to adsorb the catalyst, and the insoluble matter was removed by filtration. GPC measurement revealed that the obtained polyoxypropylene-2-ethylhexyl ether had a number average molecular weight (Mn) of 1170 and an impurity amount of 3% by mass. The details of the GPC measurement method will be described lat...

Embodiment 2

[0035] In addition to using 744 g of dodecanol (Calcol 2098, manufactured by Kao Corporation (Kao Corporation)) as a hydrogen divalent carbon-based alcohol, 8.4 g of potassium hydroxide was added, and after reducing pressure at 110° C. for 1 hour, 3,248 g of propylene oxide was added. Except that, polyoxypropylene lauryl ether having a number average molecular weight (Mn) of 1,000 was obtained in the same manner as in Example 1. Impurities were 2% by mass.

Embodiment 3

[0037] The number average molecular weight ( Mn) 1190 polyoxypropylene isotetradecyl ether. Impurities were 3% by mass.

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Abstract

Provided is a lubricating oil base oil for a refrigeration system, the lubricating oil base oil having appropriate compatibility with a hydrocarbon refrigerant, appropriate viscosity, and the like. A lubricating oil base oil for a refrigerant comprising essentially a C1-8 hydrocarbon compound, wherein the lubricating oil base oil is polyoxypropylene monohydrocarbyl ether having a number-average molecular weight of 500 to 3200, and the number of carbons in the hydrocarbyl group is 6 to 32.

Description

technical field [0001] The present invention relates to lubricating oil base oils for hydrocarbon refrigerants, that is, lubricating oil base oils for refrigerating machine oils using hydrocarbon refrigerants and lubricating oil compositions containing the base oils, in particular, to lubricating oil base oils having polyoxypropylene monomers A base oil having an ether structure and moderate compatibility with a hydrocarbon refrigerant, and a lubricating oil composition containing the base oil. Background technique [0002] Conventionally, chlorofluorocarbons such as dichlorofluoromethane have been often used as refrigerants for compression refrigerating machines. Since chlorofluorocarbons have concerns about depletion of the ozone layer, hydrofluorocarbon compounds have been studied. However, there is concern about the effect of hydrofreon compounds on global warming. [0003] Therefore, the use of hydrocarbon refrigerants free from such problems has been studied. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M107/34C09K5/04C10N20/00C10N20/02C10N30/00
CPCC10N2230/02C10N2220/021C10N2240/30C07C43/15C10N2220/303C10M107/34C09K5/042C10M171/008C10M2209/1055C09K5/04C10N2020/04C10N2030/02C10N2040/30C10N2020/103C10M2209/1085
Inventor 荒井豪明野村真吾铃木千登志
Owner ASAHI GLASS CO LTD