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High-solid-content NEPE solid propellant slurry, propellant and preparation method

A solid propellant, high solid content technology, applied in offensive equipment, explosive processing equipment, production of compressed gas, etc., can solve the problems of changes in propellant mechanical properties, prolong mixing time, and difficulty in screening additives, and reduce Viscosity and yield value, obvious process improvement, the effect of meeting the casting requirements

Active Publication Date: 2018-09-14
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technical means, such as reducing the content of bonding agents, reduce the mechanical properties of the propellant finished drug; while adjusting the gradation of solid fillers is generally to adjust the gradation of the oxidant, which changes the combustion performance and mechanical properties of the propellant; seeking process additives The only way is that it is difficult to screen effective process additives, different additives need to be used for different systems, and additives may cause changes in the mechanical properties of the propellant; prolonging the mixing time (up to more than ten hours) is not conducive to large-scale production

Method used

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  • High-solid-content NEPE solid propellant slurry, propellant and preparation method

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preparation example Construction

[0037] The embodiment of the present invention also provides a preparation method of high solid content NEPE solid propellant slurry, comprising the following steps:

[0038] Step 1. Weigh the raw materials, wherein the raw materials include ammonium perchlorate, ammonium nitrate explosive, aluminum powder, adhesive system, curing agent and functional auxiliary agent, and the aluminum powder is ultrafine aluminum powder or ultrafine aluminum Powder and FLTQ1 aluminum powder mixture, the particle size of the ultra-fine aluminum powder d 50 2.5μm-13μm;

[0039] Specifically, the raw materials used in this embodiment are provided by the above-mentioned examples. For specific description, please refer to the above-mentioned examples of raw materials, and details are not repeated here.

[0040] Step 2. Mix part of the binder system with the weighed aluminum powder, ammonium nitrate explosive and functional auxiliary agent to obtain a mixture. The quality of the binder system in th...

Embodiment 1

[0050] The present embodiment provides a kind of high solid content NEPE propellant slurry and propellant, and the preparation method comprises the following steps:

[0051] Step 1, weigh raw materials according to the formula in Table 1;

[0052] Step 2, mix the weighed PET, NG and TEGDN to obtain a binder system, and combine 10.8 parts by mass of the binder system with the weighed aluminum powder, ammonium nitrate explosive and functional additives at a telecentric pulp linear velocity of 1m / s, mixing temperature of 65 ° C under the condition of mixing for 25 minutes to obtain a mixture,

[0053] Step 3. Add the weighed AP into the obtained mixture, mix for 45 minutes at a telecentric slurry line speed of 1m / s, and a mixing temperature of 60°C, then add a curing agent and the remaining binder system, and The telecentric slurry linear velocity is 1m / s, mixed at a mixing temperature of 45°C for 20 minutes to obtain a propellant slurry;

[0054] Step 4, curing the obtained pr...

Embodiment 2

[0061] The present embodiment provides a kind of high solid content NEPE propellant slurry and propellant, and the preparation method comprises the following steps:

[0062] Step 1, weigh raw materials according to the formula in Table 2;

[0063] Step 2. Mix the weighed PET, NG and TEGDN to obtain a binder system, and combine 12 parts by mass of the binder system with the weighed aluminum powder, ammonium nitrate explosive and functional additives at a telecentric pulp line speed of 1.2 m / s and mixing temperature of 65°C for 20 minutes to obtain a mixture,

[0064] Step 3. Add the weighed AP into the obtained mixture, mix for 50 minutes at a telecentric pulp line speed of 1.2m / s, and a mixing temperature of 65°C, then add the curing agent and the remaining binder system, and The telecentric slurry linear velocity is 1.2m / s, and the mixing temperature is 50°C and mixed for 20 minutes to obtain the propellant slurry;

[0065] Step 4, curing the obtained propellant slurry at 5...

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Abstract

The invention provides high-solid-content NEPE solid propellant slurry, propellant and a preparation method, and belongs to the technical field of solid propellant. The preparation method of the slurry comprises the following steps that raw materials are weighed, wherein the raw materials comprise ammonium perchlorate, ammonium nitrate explosives, aluminum powder, an adhesive system, a curing agent and a functional agent, the aluminum powder is superfine aluminum powder or a mixture of the superfine aluminum powder and FLTQ1 aluminum powder, and the particle size d50 of the superfine aluminumpowder ranges from 2.5 micrometers to 13 micrometers; part of the adhesive system and the weighed aluminum powder, ammonium nitrate explosives and functional agent are mixed, a mixture is obtained, and the mass of part of the adhesive system accounts for 9.5% to 12% of the total mass of the raw materials; the weighed ammonium perchlorate and ammonium nitrate explosives are added into the obtainedmixture, mixing is carried out, then the curing agent and the remaining adhesive system are added, mixing is carried out, and the propellant slurry is obtained. According to the high-solid-content NEPE solid propellant slurry, propellant and the preparation method, the process performance of the propellant slurry can be obviously improved on the premise of not influencing the energy, mechanical property and mixing time of the propellant.

Description

technical field [0001] The invention relates to a NEPE propellant and a preparation method thereof, belonging to the technical field of solid propellants. Background technique [0002] With the application of tactical missiles, the requirements for propellants with high energy, low burning rate and high mechanical properties are getting higher and higher. In order to meet the use performance, NEPE high-energy solid propellant with PET as the binder is generally used, in which the content of Al powder is less than or equal to 18%, and the specification specified in GJB 1738-93 is FLTQ1 aluminum powder. Due to the requirement of high energy, the solid content of the propellant generally needs to be as high as 77%-81%, which brings great difficulties to the process performance of NEPE propellant. At the same time, in order to meet the requirements of low burning rate, the propellant oxidizer and reducing agent are both made of coarse-grained components, the propellant formulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/14C06B21/00C06D5/06
CPCC06B21/0025C06B33/14C06D5/06
Inventor 王小英张林燕为光唐泉张艳潘新洲李伟
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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