Gap-based thermoplastic propellant and preparation method thereof

A thermoplastic and propellant technology, used in offensive equipment, non-explosive/non-thermal agent components, explosives, etc., can solve the problems of limited space size, complex production process and high production cost in manufacturing mode, shortening the preparation cycle, mechanical Excellent performance and the effect of saving energy consumption in production

Active Publication Date: 2022-01-18
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of its manufacturing process are: (1) The solid propellant is formed by chemical cross-linking, and the propellant performance is easily affected by the environment; (2) There are problems such as the manufacturing mode is limited by the space size, and the expired grain is difficult to recycle; (3) The production process is complicated, the heat preservation and curing cycle is long, and the production cost is high
Compared with inert thermoplastic elastomers (TPE), energetic thermoplastic elastomers (ETPE) have the advantages of high oxygen content, high density, and high enthalpy of formation, but there are currently no mature products for ETPE

Method used

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  • Gap-based thermoplastic propellant and preparation method thereof
  • Gap-based thermoplastic propellant and preparation method thereof
  • Gap-based thermoplastic propellant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The specific formulation and performance of the GAP-based thermoplastic propellant are shown in Table 1 below.

[0031] Table 1

[0032]

[0033]

[0034] The specific preparation method of the GAP-based thermoplastic propellant is:

[0035] Put the GAP-ETPE adhesive and plasticizer (A3 and A6) into the container, heat up to 70±2°C to melt, use a high-speed mixer to mix it evenly, add metal fuel (Al) and functional additives (N , N-diphenyl-p-phenylenediamine, ottoxin, tetraethylenepentamineacrylonitrile glycidol and methyl stearate), premix them, and then convey the premixed materials to the double In the screw, add a certain amount of oxidant (AP) to the twin-screw mixing equipment through the powder feeder for mixing. The mixing temperature is 80°C to 85°C. Extrude into strips at the end of the twin-screw mixing equipment, and then use granulation It is made into uniform-sized granules, and the granules are transported into the next-stage twin-screw mixing ex...

Embodiment 2

[0037] The specific formulation and performance of the GAP-based thermoplastic propellant are shown in Table 2 below. Concrete preparation method is with embodiment 1.

[0038] Table 2

[0039]

[0040]

Embodiment 3

[0042] The specific formulation and performance of the GAP-based thermoplastic propellant are shown in Table 3 below. Concrete preparation method is with embodiment 1.

[0043] table 3

[0044]

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Abstract

The invention discloses a GAP-based thermoplastic propellant and a preparation method thereof. The propellant comprises the following components by weight: GAP-ETPE thermoplastic adhesive: 7.5%-15%; plasticizer: 10%-25% %; Oxidant: 50%~65%; Metal Fuel: 5%~18%; Functional Auxiliary: 1%~5%. The propellant uses GAP-ETPE material containing GAP diol and low-molecular-weight polyester diol as double soft segments as the binder, adopts the preparation process of twin-screw mixing granulation and twin-screw mixing casting, and the molding temperature is ≤85°C , by adjusting the temperature to realize the physical cross-linking of the propellant, breaking the time and space constraints of the traditional thermosetting propellant preparation process, its unique characteristics of recyclability, reuse, and repeated processing make flexible production possible, shortening the The preparation cycle and the reduction of production and development costs have good application prospects in the field of rapid manufacturing of launch vehicles and the field of low-cost production.

Description

technical field [0001] The invention relates to the technical field of solid propellants, in particular to a GAP-based thermoplastic propellant and a preparation method thereof. Background technique [0002] Composite solid propellants are mainly composed of liquid binders, solid oxidizers, metal fuels, functional additives and curing agents. At this stage, vertical mixers are mainly used to mix them, and the finished solid propellants are obtained through long-term heat preservation. The main disadvantages of its manufacturing process are: (1) The solid propellant is formed by chemical cross-linking, and the propellant performance is easily affected by the environment; (2) There are problems such as the manufacturing mode is limited by the space size, and the expired grain is difficult to recycle; (3) The production process is complicated, the heat preservation and curing cycle is longer, and the production cost is higher. [0003] Thermoplastic propellants can break the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B45/10C06B33/06C06B33/12C06B23/00C06D5/06
CPCC06B33/06C06B45/10C06D5/06C06B23/00C06B33/12
Inventor 张习龙刘超牛草坪刘苗娥张明权王晓东朱自强胡晓亮喻尧张华燕
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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