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Ester for refrigeration oil and working fluid composition for refrigeration oil

A technology for refrigerating machine oil and working fluid, which is applied in the field of esters for refrigerating machine oil, can solve the problems of high solubility, harsh lubrication conditions, and decreased viscosity, and achieves the effects of high compatibility and high heat resistance

Active Publication Date: 2018-01-19
NOF CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, in the case of hydrocarbon (HC) refrigerants, since there is no fluorine in the HC molecule that improves lubricity, it is not possible to expect the effect of improving lubricity from refrigerants like HFC refrigerants, and since HC refrigerants have an effect on The solubility of refrigeration oil is high and the viscosity of the oil is reduced, so the lubrication conditions become more severe

Method used

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  • Ester for refrigeration oil and working fluid composition for refrigeration oil
  • Ester for refrigeration oil and working fluid composition for refrigeration oil
  • Ester for refrigeration oil and working fluid composition for refrigeration oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Preparation of Example 1

[0099] Add 124g (1.19mol) of neopentyl glycol, 30g (0.34mol) of 1,4-butanediol, 355g (2.43mol) of adipic acid, and 339g of 3,5,5-trimethylhexanol into a four-neck flask (2.35 mol), the reaction water was distilled off at 120° C. under a nitrogen atmosphere, and the reaction was carried out under normal pressure for 3 hours at the same time. Then, the reaction was continued at 200° C. for 7 hours until the acid value was 2 or less. Excess 3,5,5-trimethylhexanol was then removed by distillation at 200° C. under a reduced pressure of 1 to 5 kPa to obtain a crude ester. The crude ester was cooled, and an acidic white clay and a silica-alumina-based adsorbent were added thereto so as to account for 1.0% by mass of the theoretically obtained ester amount, respectively, to perform an adsorption treatment. The adsorption treatment temperature, pressure, and adsorption treatment time were set at 100° C., 1 to 5 kPa, and 2 hours. Finally, filter wit...

Embodiment 2

[0100] Preparation of Example 2

[0101] Add 180g (1.73mol) of neopentyl glycol, 25g (0.28mol) of 1,4-butanediol, 360g (2.47mol) of adipic acid, and 256g of 3,5,5-trimethylhexanol into a four-necked flask (1.78 mol), the water of reaction was distilled off at 115° C. under a nitrogen atmosphere, and the reaction was carried out under normal pressure for 4 hours at the same time. The subsequent steps were carried out in the same manner as in Example 1 to obtain the target ester.

Embodiment 3

[0102] Preparation of Example 3

[0103] Add 205g (1.97mol) of neopentyl glycol, 26g (0.28mol) of 1,4-butanediol, 373g (2.55mol) of adipic acid, and 217g of 3,5,5-trimethylhexanol into the four-necked flask (1.50 mol), the reaction water was distilled off at 125° C. under a nitrogen atmosphere, and the reaction was carried out under normal pressure for 3 hours. The subsequent steps were carried out in the same manner as in Example 1 to obtain the target ester.

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PUM

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Abstract

To provide an ester lubricating oil for refrigeration oils, the ester lubricating oil having excellent lubricating properties and heat resistance. An ester for refrigeration oils is obtained from neopentylglycol (component (A)), a linear dihydric alcohol having 2 to 6 carbon atoms with a hydroxyl group at its terminal carbons (component (B)), a linear dicarboxylic acid having 4 to 10 carbon atomswith a carboxyl group at its terminal carbons (component (C)), and a monohydric alcohol having 6 to 12 carbon atoms (component (D)). Relative to 1.0 mol of a constituent derived from the component (A), the ratio of a constituent derived from the component (B) is 0.1 to 0.4 mol, the ratio of a constituent derived from the component (C) is 0.8 to 2.8 mol, and the ratio of a constituent derived fromthe component (D) is 0.3 to 2.3 mol. The ester has a hydroxyl value of 5 to 40 mgKOH / g and satisfies formula (1) and formula (2). (1) 0.08<=BOH / (AOH+BOH) <=0.15 (2) [BOH / (AOH+BOH)] / [Bmol / (Amol+Bmol)]<=0.9 AOH is the mol number of a terminal hydroxyl group derived from the component (A) in the ester. BOH is the mol number of a terminal hydroxyl group derived from the component (B) in the ester. Amol is the mol number of the constituent derived from the component (A) in the ester. Bmol is the mol number of the constituent derived from the component (B) in the ester.

Description

technical field [0001] The present invention relates to an ester for refrigerating machine oil having excellent lubricity and heat resistance. Furthermore, it relates to an ester for refrigerating machine oil, characterized in that the ester for refrigerating machine oil is used in a working fluid composition for refrigerating machine oil containing a non-chlorinated freon refrigerant or a natural refrigerant. Background technique [0002] In air conditioners such as indoor air conditioners and combined air conditioners, low-temperature equipment such as household freezers and refrigerators, industrial refrigerators, and vehicle air conditioners such as hybrid vehicles and electric vehicles, in order to replace chlorine-containing Freon refrigeration that causes ozone layer damage and other causes agent, 1,1,1,2-tetrafluoroethane (R-134a), pentafluoroethane (R-125), R as a mixed refrigerant of difluoromethane (R-32) and R-125 Hydrofluorocarbons (HFCs) such as -410A are used...

Claims

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Application Information

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IPC IPC(8): C10M105/42C10N20/00C10N30/06C10N30/08C10N40/30
CPCC10M105/42C10M2207/301C10N2020/101C10N2030/08C10N2040/30C10N2030/06
Inventor 吉川文隆加治木武山田宗宏上田成大
Owner NOF CORP
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