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Method for evaluating coating quality of passivated NTO prepared by supercritical method

A quality evaluation and supercritical technology, applied in the direction of offensive equipment, measuring devices, fuel oil testing, etc., can solve the problems of inaccurate quantification, unfavorable determination of coating process parameters, fine adjustment of insensitivity agent formula, etc.

Active Publication Date: 2020-11-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0035] (1) There is no accurate and quantitative characterization method, which is not conducive to determining the coating process parameters and fine-tuning the insensitivity agent formula;

Method used

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  • Method for evaluating coating quality of passivated NTO prepared by supercritical method
  • Method for evaluating coating quality of passivated NTO prepared by supercritical method
  • Method for evaluating coating quality of passivated NTO prepared by supercritical method

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Embodiment 1

[0049] The desensitizing agent has no acidity or alkalinity and is insoluble in water. NTO (chemical name is 3-nitro-1,2,4-triazol-5-one) is white or light yellow crystal particles with certain acidity. According to the crystal reflectivity and acidity of NTO, the coating quality of passivated NTO insensitive agent can be distinguished, and the evaluation method can be established.

[0050] Taking a certain batch of passivated NTO prepared by the supercritical heat preservation method as an example, the idea of ​​the invention of this patent is explained in detail.

[0051] The preparation method of the passivated NTO to be detected is: mix the NTO recrystallization products in the two particle size intervals of 30-60 mesh and 60-80 mesh according to the mass ratio of 3:1 to obtain the mixed particle size NTO recrystallization product; the mass ratio is 1:1 polyvinyl acetate and purified ceresinate to prepare desensitizing agent, adding ethyl acetate to the desensitizing agen...

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Abstract

The invention discloses a passivation NTO coating quality evaluation method prepared by a supercritical method. The method includes steps of: observing the debonding number of the passivated NTO particles through a magnifying lens, preparing an NTO aqueous solution to detect the pH value, detecting the corrosion degree of the passivated NTO to the Al sheet after preserving heat in a 60 DEG C RH 65% damp and hot environment for 30 days, and classifying the coating quality of the passivated NTO to be poor, IV-grade, III-grade, II-grade and I-grade. The method is mainly used for evaluating the passivation NTO prepared by the supercritical method. The passivated NTO with good coating quality does not show acidity, is suitable for manufacturing Al-containing press-fitting explosives, and does not corrode a metal shell of a warhead. In addition, passivation process parameters can be determined and insensitive agents can be screened by comparing detection values of passivation NTO.

Description

technical field [0001] The invention belongs to the field of detection and research of physical and chemical properties of propellant and explosive samples, and mainly relates to the detection and research of the coating quality of passivated NTO, especially the evaluation of the coating quality of passivated NTO prepared by a supercritical method. Background technique [0002] NTO (chemical name is 3-nitro-1,2,4-triazol-5-one) described in the present invention is a high-energy, low-sensitivity single-substance explosive with excellent comprehensive performance, which is a white or light yellow solid Granules with excellent thermal stability, melting point ≥ 260°C (decomposition), DSC decomposition peak temperature ≥ 270°C, and certain acidic pKa=3.67). The NTO crude product is obtained by nitrating 1,2,4-triazol-5-one (abbreviated as TO), and then it can be applied by improving the purity and improving the crystal form through recrystallization and other techniques. [00...

Claims

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Application Information

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IPC IPC(8): G01N33/22G01N23/00G01N15/10C06B21/00
CPCG01N33/227G01N23/00G01N15/10C06B21/0083G01N2015/1022Y02P20/54
Inventor 贾林蒋忠亮于思龙王琼张冬梅王芳芳顾妍张林军
Owner XIAN MODERN CHEM RES INST
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