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Mixed esters of mixed polyols and carboxylic acids

A technology of mixing polyols and mixed esters, which is applied in the field of mixed esters, can solve the problems of undocumented difluoromethane refrigerant compatibility and non-incidence, and achieve the effect of excellent compatibility

Active Publication Date: 2016-03-23
KH NEOCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no description of the compatibility of the ester with difluoromethane refrigerants, and the viscosity of the ester is not in the viscosity range necessary as a refrigerating machine oil

Method used

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  • Mixed esters of mixed polyols and carboxylic acids
  • Mixed esters of mixed polyols and carboxylic acids
  • Mixed esters of mixed polyols and carboxylic acids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] [The molar ratio of pentaerythritol to dipentaerythritol (ratio of pentaerythritol / dipentaerythritol) is 97 / 3, the molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5- Manufacture of mixed ester (mixed ester 1) whose ratio of trimethylhexanoic acid) is 81 / 19]

[0098] As the adsorbent, Kyowa Chemical Industry Co., Ltd. Kyowa Chemical Co., Ltd. 500 was used.

[0099] As the activated carbon, Shiratto P manufactured by Enviro Chemicals Co., Ltd., Japan was used.

[0100] 153 g of pentaerythritol (1.1 moles, manufactured by Koei-Perstorp), 9 g of dipentaerythritol (0.04 moles, manufactured by Koei-Perstorp), and 398 g of isobutyric acid (4.5 moles) were added to a reactor with a Dean-Stark separator. , Tokyo Chemical Industry Co., Ltd.) and 177 g of 3,5,5-trimethylhexanoic acid (1.1 mol, Kyowa Hakka Chemical Co., Ltd.), and nitrogen sparging was performed at room temperature for 30 minutes while stirring the mixture to deaerate the mixtur...

Embodiment 2

[0104] [The molar ratio of pentaerythritol to dipentaerythritol (ratio of pentaerythritol / dipentaerythritol) is 97 / 3, the molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5- Manufacture of mixed ester (mixed ester 2) whose ratio of trimethylhexanoic acid) is 64 / 36]

[0105] Make the molar ratio of the usage amount of pentaerythritol, dipentaerythritol, isobutyric acid and 3,5,5-trimethylhexanoic acid (ratio of pentaerythritol / dipentaerythritol / isobutyric acid / 3,5,5-trimethylhexanoic acid ) was 1 / 0.03 / 3.01 / 2.01, except that the same operation as in Example 1 was performed to obtain mixed ester 2.

Embodiment 3

[0107] [The molar ratio of pentaerythritol to dipentaerythritol (ratio of pentaerythritol / dipentaerythritol) is 97 / 3, the molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5- Manufacture of mixed ester (mixed ester 3) with a ratio of trimethylhexanoic acid) of 40 / 60]

[0108] Make the molar ratio of the usage amount of pentaerythritol, dipentaerythritol, isobutyric acid and 3,5,5-trimethylhexanoic acid (ratio of pentaerythritol / dipentaerythritol / isobutyric acid / 3,5,5-trimethylhexanoic acid ) was 1 / 0.03 / 2.01 / 3.01, except that the same operation as in Example 1 was performed to obtain mixed ester 3.

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Abstract

The present invention provides a mixed ester of a mixed polyhydric alcohol comprising pentaerythritol and dipentaerythritol which is represented by formula (I), and a carboxylic acid that contains isobutyric acid. The molar ratio of the pentaerythritol and the dipentaerythritol (pentaerythritol / dipentaerythritol) in the mixed polyhydric alcohol is between 98 / 2 and 40 / 60, and the proportion of isobutyric acid in the carboxylic acid is 35 to 85 mol.%. The mixed ester, while maintaining a viscosity range required for a refrigerator oil, exhibits excellent lubricating properties and excellent compatibility with a difluoromethane refrigerant, and can be used as a refrigerator oil and the like.

Description

technical field [0001] The present invention relates to mixed esters used in industrial lubricating oils such as refrigerating machine oils. Background technique [0002] In recent years, hydrofluorocarbons (HFCs), which have zero ozone destruction coefficient and lower global warming potential (GWP), are being used as refrigerants for refrigerators. The GWP of difluoromethane refrigerant (HFC-32) is low, and it is the refrigerant currently in use [R-410A (a mixture of difluoromethane and pentafluoroethane), R-407C (a mixture of difluoromethane and pentafluoroethane a mixture of alkane and 1,1,1,2-tetrafluoroethane), etc.], and its coefficient of performance (COP) is also increased by about 1 / 4 compared to R-410A, R-407C, etc. 5 to 13%, it is a preferable refrigerant from the viewpoint of energy saving (Non-Patent Document 1). [0003] In a refrigerant circulation circuit (circle) of a refrigerator, a structure is generally formed in which refrigerating machine oil circula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/33C10M105/38C10N30/00C10N30/02C10N40/00C10N40/04C10N40/25C10N40/30
CPCC07C69/33C10M105/38C10M171/008C10M2207/2835C10M2215/223C10N2020/011C10N2020/02C10N2020/101C10N2030/02C10N2030/06C10N2030/08C10N2040/30
Inventor 日吉聪西村拓也稻山俊宏
Owner KH NEOCHEM CO LTD