Thermoplastic composite solid propellant and preparation method thereof

A technology of solid propellants and thermoplastic elastomers, applied in offensive equipment, explosives processing equipment, explosives, etc., can solve the problems of thermoplastic propellant additive manufacturing cost control, unfavorable control of grain performance stability, etc., and achieve molten slurry viscosity Low cost, low manufacturing cost, and simplified preparation process

Active Publication Date: 2019-04-16
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing solid propellant additive manufacturing method involves the continuous mixing and plasticizing process of solid propellant raw materials and solvents. Although the addition of solvents in the manufacturing process can effectively improve the processing characteristics of thermoplastic propellants, there are problems with solvent waste treatment, efficient solvent recovery, A series of problems such as effective solvent removal are unfavorable to the cost control of thermoplastic propellant additive manufacturing and the control of grain performance stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A thermoplastic composite solid propellant, the composition of the solid propellant includes oxidant, metal fuel, thermoplastic binder, thermoplastic elastomer and auxiliary agent;

[0039] Taking the total mass of the solid propellant as 100%, the mass percentage of each component is:

[0040] Oxidant (ammonium perchlorate): 60%;

[0041] Oxidizing agent (modified ammonium nitrate): 4%

[0042] Metal fuel (spherical aluminum powder): 15%;

[0043] Thermoplastic adhesive: 10%;

[0044] Thermoplastic Elastomer: 10%;

[0045] Additives: 1%;

[0046] The thermoplastic binder is one or more than two saturated triglycerides, composed of three elements C, H, and O, with a melting point in the range of 75-85°C and a number-average molecular weight of 700-1000;

[0047] The thermoplastic elastomer is an ethylene-vinyl acetate copolymer with a vinyl acetate content of 15% to 20%;

[0048] The auxiliary agent is a mixture of stearic acid, white carbon black, iron oxide, oct...

Embodiment 2

[0056] A thermoplastic composite solid propellant, the composition of the solid propellant includes oxidant, metal fuel, thermoplastic binder, thermoplastic elastomer and auxiliary agent;

[0057] Taking the total mass of the solid propellant as 100%, the mass percentage of each component is:

[0058] Oxidant (ammonium perchlorate): 60%;

[0059] Oxidizer (RDX): 2%

[0060] Oxidant (HMX): 1%

[0061] Oxidizing agent (TATB): 0.5%

[0062] Metal fuel (PET coated spherical aluminum powder): 15%;

[0063] Thermoplastic adhesive: 15%;

[0064] Thermoplastic elastomer: 5%;

[0065] Additives: 1.5%;

[0066] The thermoplastic binder is one or more than two saturated triglycerides, composed of three elements C, H, and O, with a melting point in the range of 75-85°C and a number-average molecular weight of 700-1000;

[0067] The thermoplastic elastomer is an ethylene-vinyl acetate copolymer with a vinyl acetate content of 15% to 20%;

[0068] The auxiliary agent is a mixture of...

Embodiment 3

[0076] A thermoplastic composite solid propellant, the composition of the solid propellant includes oxidant, metal fuel, thermoplastic binder, thermoplastic elastomer and auxiliary agent;

[0077] Taking the total mass of the solid propellant as 100%, the mass percentage of each component is:

[0078] Oxidant (ammonium perchlorate): 58%;

[0079] Oxidant (NTO): 1%;

[0080] Oxidizing agent (TKX-50): 1%

[0081] Metal fuel (PTFE coated spherical Al 95 Mg 5 Alloy): 20%;

[0082] Thermoplastic adhesive: 8%;

[0083] Thermoplastic Elastomer: 10%;

[0084] Auxiliary: 2%;

[0085] The thermoplastic binder is one or more than two kinds of saturated triglycerides, composed of three elements C, H, and O, with a melting point in the range of 70-80°C and a number-average molecular weight of 500-700;

[0086] The thermoplastic elastomer is an ethylene-vinyl acetate copolymer with a vinyl acetate content of 20% to 30%;

[0087] The auxiliary agent is a mixture of stearic acid, tit...

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Abstract

The invention relates to a thermoplastic composite solid propellant and a preparation method thereof, and belongs to the technical field of composite solid propellant preparation. The invention relates to the thermoplastic composite solid propellant and the preparation method thereof. The melting temperature of the thermoplastic composite solid propellant is lower than 95 DEG C on the premise thata solvent and a liquid plasticizer are not added, the viscosity of molten slurry is low, the safety performance is excellent, and additive manufacturing of the composite solid propellant can be achieved through a fused deposition technology; the energy level of the thermoplastic composite solid propellant is equivalent to that of a medium-energy thermosetting propellant, and the thermoplastic composite solid propellant can be used as a power source of a complex-drug-type solid engine and a layered variable-thrust solid engine in the future.

Description

technical field [0001] The invention relates to a thermoplastic composite solid propellant and a preparation method thereof, belonging to the technical field of composite solid propellant preparation. Background technique [0002] Composite solid propellant is a kind of energetic composite polymer functional material composed of polymer binder, metal combustion agent, oxidant, energetic material and other components, and the content of solid filler exceeds 70%. The traditional composite solid propellant manufacturing process involves multiple processes such as premixing, mixing, mandrel disposal, pouring, curing, demoulding, shaping, etc. Generally, a special mandrel is used to control the propellant drug form, and it is difficult to achieve complex shapes and layers. Fabrication of variable thrust solid propellant grains. [0003] In recent years, with the continuous maturity of additive manufacturing equipment and technology, composite solid propellant additive manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/14C06B33/12C06B21/00
CPCC06B21/0075C06B33/12C06B33/14
Inventor 王伟李伟付晓梦王芳徐国舒赵晓丽庞爱民
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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