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Synthetic method of linear low molecular alkoxy phosphonitrile compound

A technology of molecular alkoxyphosphazene and synthesis method, applied in the direction of phosphorus organic compounds, etc., can solve the problems of no new progress in lubricating oil, easy hydrolysis, and limited application scope.

Inactive Publication Date: 2005-01-19
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

Studies have shown that although these low-molecular-weight polymers have high thermal stability, they are easily hydrolyzed, thus limiting the range of applications
Since then, there has been little new progress in the study of linear low-molecular-weight phosphazenes as stable lubricating oils.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Linear low molecular weight chlorophosphazene [PNCl 2 ] n PCl 5 Synthesis

[0027] Add 1.6g of ammonium chloride and 7.8g of phosphorus pentachloride in 100ml of tetrachloroethane solution into a 250ml flask, stir vigorously, reflux for 8 hours, and then cool. Excess ammonium chloride was filtered off, and the solvent was distilled off under reduced pressure to obtain a light brown crude product. The cyclic phosphazene was isolated with 50 ml of heptane, and the solvent was distilled off to obtain 2.2 g of a pale yellow oily product.

[0028] Linear Low Molecular Alkoxy Phosphazene [PN(OR) 2 ] n P(OR) 5 Synthesis

[0029] Slowly add 8.9 g of 2,2,3,3,4,4,5,5-octafluoro-1-pentanolate to 20 ml of toluene solution of 2.0 g of linear low molecular weight chlorophosphazene obtained above in 15 ml of toluene Solution (from 8.2g of 2,2,3,3,4,4,5,5-octafluoro-1-pentanol in 15ml of anhydrous ether solution was added dropwise to 0.8g of sodium in 15ml of anhydrous ether so...

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Abstract

The invention discloses a synthetic method of linear low molecular alkoxy phosphonitrile compound, wherein phosphorous pentachloride and ammonium chloride are used as raw materials, 1,1,2,2-tetrachloroethanes is used as solvent for reaction under the condition of normal temperature to 150 deg.C, obtaining linear low molecular chlorine replaced phosphoric nitrile, and toluene is used as solvent, at the presence of tetrabutyl ammonium bromide, the linear low molecular chlorine replaced phosphoric nitrile reacts with alcohol sodium.

Description

technical field [0001] The invention describes a method for synthesizing a linear low molecular weight alkoxy phosphazene compound. technical background [0002] Phosphazene compounds are a class of compounds whose skeletons are alternately arranged with phosphorus atoms and nitrogen atoms. They have excellent properties of both inorganic and organic substances. They can be used as lubricants, lubricating oil additives, flame retardant materials or special rubbers. [0003] At present, cyclic trimers and linear high-molecular-weight phosphazenes are mostly studied on phosphazenes, but there are few reports on linear low-molecular-weight phosphazenes. As early as the 1960s, the U.S. Air Force Materials Research Office began to investigate the performance of linear low-molecular chlorophosphazene compounds as high-temperature lubricants. Studies have shown that although these low-molecular polymers have high thermal stability, they are easily hydrolyzed, thus limiting the sco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/06
Inventor 刘维民朱佳媚
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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