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Low-melting-point thermoplastic solid propellant and preparation method thereof

A solid propellant and thermoplastic technology, which is applied in the field of low-melting thermoplastic solid propellant and its preparation, can solve the problems of waste and push up propellant production costs, and achieve reduced process costs, excellent repeatable processing, and improved intrinsic safety Effect

Active Publication Date: 2018-06-12
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Composite solid propellants widely used at present are all thermosetting propellants. Although this type of propellant has high energy and mature production technology, the disposal of waste products and expired products can only be carried out through combustion, which has caused extremely serious problems. Big waste, but also push up the production cost of propellant

Method used

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Examples

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Effect test

preparation example Construction

[0055] A preparation method of a low melting point thermoplastic solid propellant, the steps of the method comprising:

[0056] (1) Prepare plasticizer: mix dioctyl sebacate and liquid polybutadiene, then carry out decompression heating and rotary distillation treatment to obtain plasticizer;

[0057] When the dioctyl sebacate and liquid polybutadiene are mixed, a water bath is used to control the temperature, the temperature is 20-30°C, and the two are mixed evenly by mechanical stirring, and the stirring speed is 20-100rpm , the stirring time is 30-60min;

[0058] The conditions for the decompression heating and rotary distillation treatment are as follows: the degree of vacuum is -0.1-0MPa, the temperature is 70-90°C, the rotation speed of the rotary distillation is 20-100rpm, and the time is 30-60min;

[0059] (2) Oxidant, plasticizer, metal fuel, auxiliary agent are weighed according to said ratio;

[0060] (3) Put the thermoplastic adhesive into a vertical mixer to hea...

Embodiment 1

[0072] (1) Preparation and composition of composite plasticizer and low melting point thermoplastic solid propellant

[0073] Preparation of composite plasticizer: weigh according to mass ratio dioctyl sebacate: liquid polybutadiene (number-average molecular weight 900~1100)=1:0.8, put it into a container, put the container into a water bath, and carry out Mechanical stirring, water bath temperature 27°C, rotary steaming speed 45rpm, stirring time 40min, seal the mixed plasticizer in a rotary steamer bottle, use a vacuum pump to depressurize the rotary steamer bottle to -0.1MPa, heat the temperature to 70°C, Rotary steaming speed is 65rpm, rotary steaming time is 30min, and composite plasticizer A is obtained.

[0074] Preparation of low-melting thermoplastic solid propellant: Weigh the oxidizing agent, binder, composite plasticizer A, metal fuel, and additives according to the stated ratio; put the binder into a vertical mixer to heat and melt, and the mixing temperature 85-...

Embodiment 2

[0079] (1) Preparation and composition of composite plasticizer and low melting point thermoplastic solid propellant

[0080] Preparation of composite plasticizer: weigh according to mass ratio dioctyl sebacate: liquid polybutadiene (number-average molecular weight 1400~1700)=0.7:1, put it into a container, put the container into a water bath, and carry out Mechanical stirring, water bath temperature 22°C, rotary steaming speed 60rpm, stirring time 35min, seal the mixed plasticizer in a rotary steamer bottle, use a vacuum pump to depressurize the rotary steamer bottle to -0.06MPa, heat the temperature to 85°C, Rotary steaming speed is 40rpm, rotary steaming time is 35min, and composite plasticizer B is obtained.

[0081] The preparation of low-melting thermoplastic solid propellant is the same as in Example 1.

[0082] Composition (mass percentage) of low-melting thermoplastic solid propellant: EVA420 (10%), composite plasticizer B (10%), ammonium perchlorate (54%), ammonium ...

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Abstract

The invention relates to a low-melting-point thermoplastic solid propellant and a preparation method thereof, and belongs to the technical field of composite solid propellants. The propellant is prepared from the following components by mass percent: 55%-70% of oxidant, 10%-20% of thermoplastic elastomer binder, 10%-20% of plasticizer, 5%-20% of metal fuels and 3%-8% of auxiliaries. The prepared low-melting-point thermoplastic solid propellant has the advantages that melting mixing and forming of the thermoplastic propellant at a relatively low temperature lower than 95 DEG C can be realized,process safety of thermoplastic propellant preparation is greatly improved, a curing and cross-linking process in comparison with a thermoplastic propellant is cut out, process flow is shortened, production efficiency is improved, production cost is reduced and repeated processing of waste products can be realized.

Description

technical field [0001] The invention relates to a low-melting-point thermoplastic solid propellant and a preparation method thereof, belonging to the technical field of composite solid propellants. The low-melting point means that the melting point of the propellant is lower than 95°C. Background technique [0002] Composite solid propellants widely used at present are all thermosetting propellants. Although this type of propellant has high energy and mature production technology, the disposal of waste products and expired products can only be carried out through combustion, which has caused extremely serious problems. Big waste, but also push up the production cost of propellant. Contents of the invention [0003] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to propose a low melting point thermoplastic solid propellant and its preparation method. [0004] Technical solution of the present invention is: [0005] A low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/12C06B23/00C06D5/06
CPCC06B23/009C06B33/12C06D5/06
Inventor 刘轩王文博乔应克孙晓飞王亚易清丰鲁国林
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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