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Gas generating agent and preparation method thereof

A technology of gas generating agent and auxiliary agent, which is applied in the direction of explosives, etc., which can solve the problems of high gas production temperature and harsh ignition conditions, and achieve the effects of good combustion performance, low mechanical sensitivity and easy preservation

Active Publication Date: 2021-06-18
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high gas generation temperature and harsh ignition conditions in existing gas generating agents, and to provide a gas generating agent with low gas generation temperature and ignitable under normal temperature and pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A gas generating agent, in terms of 100g, it is composed of 76g component A, 21g component B and 3g auxiliary agent; wherein, component A is composed of 23.56g urea nitrate and 52.44g guanidine nitrate, and component B is composed of 15.12g Potassium nitrate and 5.88g ethylenediamine chromate, the auxiliary agent is sodium tetraborate.

[0020] Further, the preparation method of the above-mentioned gas generating agent comprises the following steps:

[0021] 1) Preparation of component A: Take 23.56g of urea nitrate and 52.44g of guanidine nitrate, mix them and place them in a non-metallic lined ball mill for grinding treatment. The grinding balls are made of ceramic grinding balls, the speed is 390rpm, and the grinding time is 1.2h , to obtain component A;

[0022] 2) Preparation of component B: configure 0.5mol / L chromic acid solution, slowly add anhydrous ethylenediamine with a ratio of 1:1 to the chromic acid substance in the chromic acid solution to the chromic ac...

Embodiment 2

[0027] A gas generating agent, in terms of 100g, it is composed of 76g component A, 21g component B and 3g auxiliary agent; wherein, component A is composed of 29.64g urea nitrate and 46.36g guanidine nitrate, and component B is composed of 16.8g Potassium nitrate and 4.2g ethylenediamine chromate, the auxiliary agent is sodium tetraborate.

[0028] Further, the preparation method of the above-mentioned gas generating agent comprises the following steps:

[0029] 1) Preparation of component A: Take 29.64g of urea nitrate and 46.36g of guanidine nitrate, mix them and place them in a non-metallic lined ball mill for grinding treatment. The grinding balls are made of ceramic grinding balls, the speed is 400rpm, and the grinding time is 1h. Obtain component A;

[0030] 2) Preparation of component B: configure 0.5mol / L chromic acid solution, slowly add anhydrous ethylenediamine with a ratio of 1:1 to the chromic acid substance in the chromic acid solution to the chromic acid solut...

Embodiment 3

[0034] A gas generating agent, in terms of 100g, it is composed of 80g component A, 12g component B and 8g auxiliary agent; wherein, component A is composed of 31.2g urea nitrate and 48.8g guanidine nitrate, and component B is composed of 8.64g Potassium nitrate and 3.36g ethylenediamine chromate, auxiliary agent is sodium tetraborate.

[0035] Further, the preparation method of the above-mentioned gas generating agent comprises the following steps:

[0036] 1) Preparation of Component A: Take 31.2g of urea nitrate and 48.8g of guanidine nitrate, mix them and place them in a non-metallic lined ball mill for grinding treatment. The grinding balls are made of ceramic grinding balls, the speed is 395rpm, and the grinding time is 1.5h , to obtain component A;

[0037] 2) Preparation of component B: configure 0.5mol / L chromic acid solution, slowly add anhydrous ethylenediamine with a ratio of 1:1 to the chromic acid substance in the chromic acid solution to the chromic acid soluti...

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PUM

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Abstract

The invention relates to a gas generating agent, which comprises, by mass, 76-80% of a component A, 12-21% of a component B and 3-8% of an auxiliary agent, the component A comprises urea nitrate and guanidine nitrate according to a certain ratio, the component B comprises potassium nitrate and ethylenediamine chromate according to a certain ratio, and the auxiliary agent is sodium tetraborate. The formula has the advantages that oxygen balance is easy to achieve, the combustion performance is good, the gas production rate is high, the mechanical sensitivity is low, storage is easy and the like, gas production components are basically non-toxic CO2, N2 and water vapor, and the non-sodium-azide gas production agent is an ideal non-sodium-azide gas production agent.

Description

technical field [0001] The invention belongs to the technical field of gas generating agents, in particular to a gas generating agent and a preparation method thereof. Background technique [0002] As a solid propellant for a pyrotechnic fire extinguishing system, currently the most commonly used gas generant compositions on the market are tetrazole-type and aminoguanidine-type, and phase-stabilized ammonium nitrate (PSAN) and metal oxides are generally used as the B component. The tetrazole-type gas generating agent has a higher gas production temperature, and an additional cooling agent is required to cool down, and when phase-stable ammonium nitrate (PSAN) is used as the B component, it needs to be ignited under high pressure conditions, and the ignition conditions are relatively harsh. The Chinese patent application publication number CN 104788269 A discloses a group of gas generating agent compositions, including fuel, oxidant, catalyst, binder, slagging agent, phase st...

Claims

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Application Information

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IPC IPC(8): C06B31/12
CPCC06B31/12Y02E60/36
Inventor 刘迎彬赵子昊郭昊阳赵彦
Owner ZHONGBEI UNIV
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