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A kind of chlorine-free low-melting-point thermoplastic gas generating agent and preparation method thereof

A gas generating agent, low melting point technology, used in the production of compressed gas, attack equipment, explosives, etc., can solve the problems of high burning rate and pressure index, low energy level, etc., to achieve zero waste rate and improve intrinsic safety. Effect

Active Publication Date: 2018-09-18
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the disadvantages of chlorine-free low melting point thermoplastic gas generating agents are low energy level and slightly high burning rate pressure index

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Composition of chlorine-free low melting point thermoplastic gas generating agent

[0042] Oxidizer (modified ammonium nitrate): 70%; cooling agent (ammonium oxalate): 10%; combustion regulator (chromium oxide): 1%; binder (EVA420): 10%; Acid dioctyl ester): 7%; Auxiliary (tris[1,-(2-methylaziridine)]phosphine oxide): 0.3%; Auxiliary (silane coupling agent): 0.2%; Auxiliary (N , N-diphenyl-p-phenylenediamine): 1.2%; Auxiliary (carbon black): 0.3%

[0043] (2) Performance of chlorine-free low melting point thermoplastic gas generating agent

[0044] Specific impulse: 1848.06 N*s / kg; Combustion temperature: 938.47 o C; characteristic velocity: 1067.14 m / s; gas average molecular weight: 21.8 g / mol; melting point: 81.3 o C; gas output: 1184.9 L / Kg; residue content: 2.4%; pressure index (3MPa~9MPa): 0.48

Embodiment 2

[0046] (1) Composition of chlorine-free low melting point thermoplastic gas generating agent

[0047] Oxidant (modified ammonium nitrate): 72%; cooling agent (dihydroxyglyoxime): 10%; combustion regulator (chromium trioxide): 0.5%; combustion regulator (vanadium pentoxide): 1.5%; Binder (EVA420): 8%; Plasticizer (acetyl triethyl citrate): 6%; Auxiliary (alcohol amine complex): 0.2%; Auxiliary (aluminate coupling agent): 0.6 %; Auxiliary (N,N-diphenyl-p-phenylenediamine): 0.5%; Auxiliary (carbon black): 0.7%

[0048] (2) Performance of chlorine-free low melting point thermoplastic gas generating agent

[0049] Specific impulse: 1951.14 N*s / kg; Combustion temperature: 1122.5 o C; characteristic velocity: 1213.18 m / s; gas average molecular weight: 22.3 g / mol; melting point: 82.1 o C; gas output: 1152.0 L / Kg; residue content: 2.5%; pressure index (3MPa~9MPa): 0.51

Embodiment 3

[0051] (1) Composition of chlorine-free low melting point thermoplastic gas generating agent

[0052] Oxidizer (modified ammonium nitrate): 65%; cooling agent (dihydroxyglyoxime): 8%; cooling agent (calcium carbonate): 5%; combustion regulator (vanadium pentoxide): 0.4%; combustion regulator (Fe2O3): 0.6%; binder (EVA420): 9%; plasticizer (acetyl triethyl citrate): 6%; plasticizer (mineral oil): 2%; [1,-(2-methylaziridine)]phosphine oxide): 0.4%; auxiliary agent (aluminate coupling agent): 1.2%; auxiliary agent (N,N-diphenyl-p-phenylenediamine) : 1.8%; Auxiliary (carbon black): 0.6%

[0053] (2) Performance of chlorine-free low melting point thermoplastic gas generating agent

[0054] Specific impulse: 1746.92 N*s / kg; Combustion temperature: 915.49 o C; characteristic velocity: 1008.94 m / s; gas average molecular weight: 23.1 g / mol; melting point: 82.5 o C; gas output: 1072.5 L / Kg; residue content: 2.61%; pressure index (3MPa~9MPa): 0.54

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Abstract

The invention provides a chlorine-free low-melting-point thermoplastic gas generating agent and a preparation method thereof. The chlorine-free low-melting-point thermoplastic gas generating agent comprises the following components in percentages by mass: 60 to 80% of an oxidant, 1 to 20% of a cooling agent, 1 to 3% of a combustion regulator, 5 to 10% of a low-melting-point thermoplastic resin adhesive, 1 to 5% of an auxiliary agent and 1 to 10% of a plasticizer. The thermoplastic gas generating agent prepared by using the method provided by the invention is free of metal powder, has a low combustion temperature, has clean gas, and overcomes the disadvantage that a large amount of hydrogen chloride generated in combustion products causes air pollution due to application of ammonium perchlorate in a conventional gas generating agent. The thermoplastic gas generating agent provided by the invention can realize melt-mixing at a low temperature (less than 90 DEG C), greatly improves the preparation safety of a thermoplastic propellant, can realize continuous production and repeated processing of waste products, and reduces production cost.

Description

technical field [0001] The invention relates to a chlorine-free low-melting thermoplastic gas generating agent for gas generators and other gas generators, belonging to the field of composite solid propellants. Background technique [0002] Ammonium perchlorate (AP) has the advantages of high oxygen balance, wide range of sources and low price. As a cost-effective oxidant, it has been widely used in the field of gas generating agents. Usually, the mass fraction in gas generating agents can be It reaches about 70%, but the gas generating agent containing AP will produce a large amount of hydrogen chloride (HCl) gas during the combustion process, which will cause air pollution and damage the ozone layer when discharged into the atmosphere, and combine with moisture in the air to produce acid mist Or acid rain, which causes serious damage to human beings and nature. With the gradual enhancement of people's awareness of environmental protection, chlorine-free gas generators have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B31/28C06D5/00
Inventor 刘轩鲁国林乔应克李志勇
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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