A kind of chlorine-free low melting point thermoplastic gas generator and preparation method thereof

Abstract

The invention relates to a chlorine-free low melting point thermoplastic gas generating agent and a preparation method thereof, which specifically comprises the following components in mass percent: oxidant: 60-80%; cooling agent: 1-20%; combustion regulator: 1-3% %; low melting point thermoplastic adhesive: 5-10%; additives: 1-5%; composite plasticizer: 1-10%, composite plasticizer is a mixture of dioctyl sebacate and liquid nitrile rubber , the mass percentage content of dioctyl sebacate is 30% to 70%, the mass content of liquid nitrile rubber is 70% to 30%, and the plasticizer can be plasticized by using a specific component and proportioning compound plasticizer. It has the effect of one agent with multiple functions, and the composite plasticizer realizes the complementary advantages of macromolecular plasticizer and small molecular plasticizer, which is beneficial to improve the mechanical properties of low melting point thermoplastics. And process performance, reduce the melting temperature of thermoplastic gas generating agent, realize the mixing of thermoplastic gas generating agent at a lower temperature, and improve 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