Photocurable propellant and preparation method thereof

Abstract

The invention discloses a light-curing propellant and a preparation method thereof. The propellant comprises the following components in mass percentage: 10%-20% of light-curable resin, 5%-15% of active diluent, and 3%-15% of photoinitiator. 5%, oxidant 60%~75%, metal combustion agent 1%~5%, functional additive 2%~5%. When preparing the light-curing propellant of the present invention, first put other raw materials except the oxidizing agent into the container of the acoustic resonance mixing equipment, and mix them; The solidified slurry is transported to the barrel, and after vacuum degassing, the propellant 3D printing is realized by means of pneumatic extrusion, ultraviolet lamp curing, and layer-by-layer superposition. The light-curing propellant has good adaptability to the pneumatic extrusion 3D printing process. It has the characteristics of molding at room temperature, no need for molds, no need for post-heating curing, and high process safety. It can be used to prepare small doses and arbitrary complex drugs. type structure of solid propellant grains.

Description

technical field [0001] The invention belongs to the technical field of composite solid propellants, in particular to a photocurable propellant and a preparation method thereof. Background technique [0002] The manufacturing process of the composite solid propellant at the present stage is as follows: After mixing the raw materials such as liquid hydroxyl-terminated adhesive, metal combustion agent, functional additive, oxidant, and isocyanate curing agent evenly on a vertical mixer, the propellant is vacuum-cast The slurry is poured into the mold (billet box) or the engine casing, and then the propellant sample is obtained through 5d to 7d heat preservation and solidification. For solid propellant grains with complex drug-type structures, it is necessary to consider the process implementation in the design, which is extremely unfavorable for the design of refined and high-quality products, and the utilization rate of the charge chamber is low. The production cycle of the p...

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Problems solved by technology

In the patent CN111559948A "3D printing solid propellant / heat insulation layer formula and its integrated preparation method", in order to improve the interface bonding strength between the propellant and the heat insulation layer, it is proposed to use the same photosensitive resin as the main body bonding of the propellant and heat insulation layer formula agent, the prepared solid propellant sample has low mechanical properties at room temperature

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