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Liquid float-type gyroscope suspension

A liquid-floating gyroscope and suspension technology, applied in the petroleum industry, base materials, lubricating compositions, etc., can solve the problems of high freezing point, large molecular weight distribution range, abnormal instrument performance, etc., and achieve the effect of simple method

Inactive Publication Date: 2008-01-16
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the consideration of appropriate specific gravity, viscosity, and larger molecular weight, this has caused the disadvantage that the freezing point of these compounds is generally higher
In addition, the suspension mentioned above is a type of oligomer with a large range of molecular weight distribution, which leads to abnormal performance of the instrument
thus limiting their prospects for use

Method used

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  • Liquid float-type gyroscope suspension
  • Liquid float-type gyroscope suspension
  • Liquid float-type gyroscope suspension

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of perfluoro-(2,5-dimethyl-3,6-dioxynonanoic acid)(2'4'6'-tribromophenyl)ester:

[0022]

[0023] Add 26.48g (0.08mol) 2,4,6-tribromophenol, 100ml methylene chloride and 6.32g (0.08mol) pyridine successively into a 500ml three-necked flask equipped with a condenser, dropping funnel, thermometer and nitrogen port , under the condition of electromagnetic stirring and nitrogen flow, slowly drop 50g (0.1mol) perfluoro-2,5-dimethyl-3,6-dioxynonanoyl fluoride, when dropping, the temperature is controlled at 10- Between 35 ℃, then add 0.4g dimethylaminopyridine, after reacting for 3 hours, the reactant was washed three times with distilled water, 80ml each time, the organic phase was filtered with a silica gel column, the filtrate was evaporated to dryness on a rotary evaporator, and passed Column separation and purification yielded 50 g of a colorless viscous liquid, which was analyzed by gas chromatography and mass spectrometry as a pure product.

[0024] Mas...

Embodiment 2

[0028] Perfluoro-2,5,8,11-tetramethyl-3,6,9,12-tetraoxypentadecanoic acid (2',3',4',5',6'-pentabromophenyl) ester Preparation of:

[0029]

[0030] 25g (0.051mol) 2,3,4,5,6-pentabromobenzene, 120ml carbon tetrachloride (refluxing with calcium hydride) and 5.2g (0.065mol) pyridine were added successively to a condenser tube, and the dripping Funnel, thermometer and nitrogen inlet in a 250ml three-neck flask. Under the condition of electromagnetic stirring and nitrogen flow, slowly add 46.6g (0.0561mol) perfluoro-2,5,8,11-tetramethyl-3,6,9,12 tetraoxypentadecanoyl fluoride dropwise, The temperature was controlled at 0-30°C, and then 0.4g of dimethylaminopyridine was added. After 3 hours of reaction, the reactant was washed three times with distilled water, 80ml each time. Evaporate to dryness, and separate and purify by column to obtain 53 g of colorless gum, which is pure product by gas chromatography, mass spectrometry and infrared analysis.

[0031] Infrared (IR): 1808,...

Embodiment 3

[0033] Preparation of perfluoro-(2,5,8-trimethyl-3,6,9-trioxydodecanoic acid)(2',6'-dibromo-4-tert-butylphenol:

[0034]

[0035] 24.64g (0.08mol) 2,6-dibromo-4-tert-butylphenol, 100ml sherwood oil and 7.9g pyridine are added successively in the 500ml three-neck flask that condensation tube, dropping funnel, thermometer and nitrogen port are installed, Under the condition of electromagnetic stirring and nitrogen flow, 67g perfluoro-2,5,8-trimethyl-3,6,9-trioxydodecanoyl fluoride was slowly added dropwise, and the temperature was controlled at 10 Between -30°C. Then add 0.4g dimethylaminopyridine, after reacting for 3 hours, the reactant was washed three times with distilled water, 80ml each time, the organic phase was filtered in a silica gel column, the filtrate was evaporated to dryness on a rotary evaporator, and separated and purified through a column to obtain 68g colorless viscous liquid. The pure product was analyzed by gas chromatography, mass spectrometry and inf...

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Abstract

The present invention relates to a suspension used in liquid floated gyroscope, it is made up by making perfluoroether carbonyl fluoride and substituted phenol compound produce reaction in organic solvent and in the pressure of inorganic alkali monovalent metal and ammonia or organic or inorganic amine compound on whose nitrogen atom the arc-paired electron is contained. The structure formula of said compound is provided by said invention also.

Description

field of invention [0001] The invention mainly relates to a liquid floating gyroscope suspension, a preparation method and an application. Background of the invention: [0002] Many instruments and meters need to use suspension as the working medium. With the continuous expansion of the application field and environment, the requirements for suspension are getting higher and higher. A good suspension must have the advantages of high specific gravity, high viscosity and low solidification. [0003] Currently commonly used suspensions are mainly polymers of chlorotrifluoroethylene, bromotrifluoroethylene, and triazine compounds with halogenated side bonds (such as U.S.P.5248432, etc.). This has the disadvantage of generally higher freezing points for these compounds due to consideration of appropriate specific gravity, viscosity, and larger molecular weight. In addition, the above-mentioned suspension is a type of oligomer with a large molecular weight distribution range, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M105/52
Inventor 卿凤翎沈学强
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI