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Preparation method for cyanoethyl graft amide

A technology of grafted amide and cyanoethyl, which is applied in the field of cyanoethyl grafted amide and its preparation, can solve the problems of high reactivity, too fast increase of syrup viscosity, and small dosage, so as to achieve stable reaction process, drug Good slurry flow and leveling, high purity effect

Active Publication Date: 2015-07-08
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, amide compounds are introduced into the high burning rate formula of butylated hydroxy as process additives, and the dosage is small and the effect is remarkable; it can improve the physical infiltration of the interface between the filler and the binder, and effectively improve the process performance of the propellant in the early stage of mixing. The active hydrogen on the active group reacts too high with the curing agent toluene diisocyanate, which causes the viscosity of the syrup to increase too fast, and the pot life of the syrup is only about 4 hours

Method used

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  • Preparation method for cyanoethyl graft amide
  • Preparation method for cyanoethyl graft amide
  • Preparation method for cyanoethyl graft amide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve the amide in 4.5 times the volume of dimethyl sulfoxide solvent, add dropwise 2.8 times the molar ratio of propylene under mechanical stirring

[0022] Nitrile, when the acrylonitrile is added dropwise, an ice-water bath is used for cooling, so that the liquid phase temperature is maintained at 30°C. The reaction was carried out at 78°C for 6 hours under reflux and stirring; the reaction was stopped, and excess acrylonitrile and inert solvent were evaporated to obtain a cyanoethyl graft amide.

Embodiment 2

[0024] Dissolve the amide in 4.5 times the volume of a 1:1 mixed solution of dimethyl sulfoxide and acetone, add dropwise 2.5 times the molar ratio of acrylonitrile under mechanical stirring, and use ice-water bath cooling when adding acrylonitrile. Maintain the liquidus temperature at 30°C.

[0025] The reaction was carried out at 50° C. for 12 hours under reflux and stirring; the reaction was stopped, and excess acrylonitrile and inert solvent were evaporated to obtain cyanoethyl graft amide.

Embodiment 3

[0027] Dissolve the amide in 3 times the volume of the dimethyl sulfoxide solution solvent, add 2.2 times the molar ratio of propylene dropwise under mechanical stirring.

[0028] Acrylonitrile, when the acrylonitrile is added dropwise, an ice-water bath is used for cooling, so that the liquid phase temperature is maintained at 27°C. Under reflux and stirring conditions, the reaction was carried out at 100°C for 3 hours; the reaction was stopped, and excess acrylonitrile and inert solvent were evaporated to obtain cyanoethyl graft amide.

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Abstract

The invention relates to a preparation method for cyanoethyl graft amide and a product, which belong to the field of manufacturing for composite solid propellants. The preparation method for cyanoethyl graft amide comprises the following steps of: dissolving amide in 3-6 times of volume of inert solvent, dripping a certain amount of acrylonitrile at a room temperature while mechanically stirring, and reacting for 3-12 hours at 50-100 DEG C in a reflux stirring condition; and stopping the reaction, and steaming out excessive acrylonitrile and inert solvent to obtain the cyanoethyl graft amide. The preparation method has the characteristics of being safe, convenient to operate, high in product purity and high in yield.

Description

Technical field [0001] The invention belongs to the field of composite solid propellant manufacturing, and specifically relates to a cyanoethyl graft amide and a preparation method thereof. Background technique [0002] Composite solid propellant materials are high solids composed of binder systems, plasticizers, metal powders such as aluminum powder, magnesium aluminum alloy, etc., oxidizer powders such as ammonium perchlorate, potassium perchlorate, etc., burning rate regulators and functional additives. The content of solid energetic materials. The manufacturing process mainly includes three main processes: mixing, pouring and curing of the slurry. The mixing and pouring of the propellant is actually carried out in the flow state of the slurry. The rheological properties of the slurry are directly related to the propellant's performance. Pouring property, leveling property, structural integrity, stability of internal ballistic performance, etc. Since the 1960s, the solid pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C255/25C07C253/30G01N5/04C06B23/00
Inventor 陈丽萍舒凯凯易会岩段军鸿罗桂莲牛草坪韩清杨香萍郑化殷以华李方朔宋艳朋吴素心
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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