Chlorine-free low-melting-point thermoplastic gas generating agent and preparation method thereof

Abstract

The invention relates to a chlorine-free low-melting-point thermoplastic fuel gas generating agent and a preparation method thereof. The chlorine-free low-melting-point thermoplastic fuel gas generating agent specifically comprises the following components in percentage by mass: 60-80% of an oxidizing agent; 1-20% of a cooling agent; 1-3% of a combustion regulator; 5-10% of a low melting point thermoplastic adhesive; 1-5% of an auxiliary agent; and 1-10% of a composite plasticizer. The composite plasticizer is a mixture of dioctyl sebacate and liquid nitrile rubber, the mass percent content of the dioctyl sebacate is 30-70%, the mass percent content of the liquid nitrile rubber is 70-30%, and the composite plasticizer with specific components and proportions not only plays a role of a plasticizer, but also plays a role of a bonding agent. The composite plasticizer has multiple effects, realizes the advantage complementation of a macromolecular plasticizer and a micromolecular plasticizer, is beneficial to improving the mechanical and technological properties of low-melting-point thermoplasticity, reduces the melting temperature of the thermoplastic gas generating agent, realizes the mixing of the thermoplastic gas generating agent at a lower temperature, and improves the intrinsic safety of the production process.

Description

technical field [0001] The invention relates to a chlorine-free low-melting-point thermoplastic gas generating agent for gas generators and other gas generators and a preparation method thereof, belonging to the technical field of composite solid propellants. Background technique [0002] Ammonium perchlorate (AP) is widely used in fields such as gas generating agent because of its raw material is easy to get, cheap, etc., and its content (mass fraction) can reach about 70% in gas generators. Due to its composition characteristics, AP will produce a large amount of HCl gas during the combustion process of the gas generating agent, which greatly reduces the stealth of the weapon system and reduces the penetration capability of the weapon. At the same time, a large amount of HCl is discharged into the atmosphere, which will cause the destruction of the ozone layer. At the same time, it will combine with the water vapor in the air to form acid mist or acid rain, which will seri...

AI Technical Summary

Problems solved by technology

[0003] The currently used composite solid gas generating agent is mainly a thermosetting gas generating agent (that is, a thermosetting adhesive is used as a matrix material). After decades of development, it has excellent comprehensive performance, but its thermosetting characteristics make this type The gas generating agent does not have the disadvantages of reprocessing and recyclability, which makes the thermosetting gas generating agent products that are expired or have quality defects can only be burned, causing great pollution to the environment and a great increase in cost