CN111019723A - Clean gas generating agent - Google Patents

Abstract

According to the invention, chlorine-free 1, 1-diamino-2, 2-dinitroethylene is introduced into the formula of the gas generator and used as a clean oxidant to replace ammonium perchlorate, so that the problems of large combustion smoke and more residues of the gas generator are solved. The clean gas generating agent disclosed by the invention has the characteristics of clean gas, low residue, low characteristic signal, safety, passivity and the like. The gas generating agent is applied to the power source of the aircraft, greatly improves the combat efficiency and the wartime viability of the aircraft, and has extremely wide application prospect.

Description

Clean gas generating agent

Technical Field

The invention belongs to the field of gas generating agents, and relates to a gas generating agent formula which takes 1, 1-diamino-2, 2-dinitroethylene as an oxidant and has the characteristics of low sensitivity, no chlorine, cleanness and the like.

Background

The gas generating agent is a special composite solid propellant, and has high application value in the fields of aviation, aerospace, missiles and the like as an auxiliary power system. The research on the gas generating agent has been carried out in 60 s as early as 20 th century abroad, and the research and development work of the gas generating agent begins in 80 s in China, Ammonium Perchlorate (AP) is mostly adopted as an oxidant in the current domestic and foreign traditional gas generating agent formula, but AP is easy to absorb moisture and agglomerate to influence the service performance of the AP, and has higher requirements on storage, transportation and the like, and in addition, the Cl element is contained in the AP, so that the gas generating agent taking AP as the oxidant generates HCl gas in the combustion process, the gas smoke is white, the low characteristic signal requirements cannot be met, and meanwhile, the emission into the atmosphere causes air pollution, and the damage to the atmosphere, the acid rain hazard and the like are caused.

With the continuous improvement of the war demand of the new century, the requirement on a tactical weapon system is higher and higher, and the gas generating agent as an auxiliary power system has higher and higher requirements on the cleanliness, the safety performance and the low characteristic signal of a product while pursuing high performance.

1, 1-diamino-2, 2-dinitroethylene (FOX-7) is used as a clean chlorine-free energetic compound, has the characteristics of good heat resistance, high energy, low sensitivity and the like, has higher thermal stability in a wider temperature range, and is insensitive to impact, friction and electrostatic sparks. FOX-7 is adopted to replace AP as an oxidant, so that the harm to the natural environment can be reduced, and the requirement of the prior tactical weapons on high safety performance can be met, therefore, the gas generating agent using 1, 1-diamino-2, 2-dinitroethylene as the oxidant has a wide application prospect, and is worthy of deep research.

Disclosure of Invention

The invention aims to overcome the defects of the background art and provide a clean gas generating agent which has low sensitivity, no chlorine and cleanness, improves the ignition performance and realizes adjustable burning speed.

The technical solution of the invention is as follows: a clean type gas generating agent comprises the following components in percentage by mass:

oxidizing agent: 70 to 85 percent

Adhesive system: 8 to 25 percent

Plasticizer: 3 to 8 percent of

Combustion regulator: 0 to 5 percent

An anti-aging agent: 0.3 to 0.7 percent

The oxidant is 1, 1-diamino-2, 2-dinitroethylene (FOX-7).

Further, the above adhesive system comprises an adhesive and a curing agent: wherein the adhesive is one or a combination of hydroxyl-terminated polybutadiene (HTPB), ethylene oxide-tetrahydrofuran copolyether (PET) and poly (3, 3-bis-azidomethyloxetane-tetrahydrofuran (PBT); the curing agent is one or a combination of isophorone diisocyanate (IPDI), Toluene Diisocyanate (TDI), Hexamethylene Diisocyanate (HDI), diphenylmethane-4, 4' -diisocyanate (MDI) and modified hexamethylene polyisocyanate (N100).

Further, the plasticizer is one or a combination of dioctyl sebacate (DOS), Acetyl Triethyl Citrate (ATC), Nitroglycerin (NG), triethylene glycol dinitrate (TEGDN), and the like;

further, the combustion regulator is ferric oxide (Fe)₂O₃) And/or 2, 2-bis (ethyl ferrocene) propane (GFP), the two combustion regulators are obtained through experimental screening, the problems of low combustion speed and difficult ignition of the gas generating agent are solved, and a technical way for adjusting the combustion speed is provided for the novel chlorine-free clean gas generating agent.

Further, the anti-aging agent is one or more of methylene 4426-s (6201) and N-methyl paranitroaniline (MNA).

The performance parameters of the gas generating agent taking 1, 1-diamino-2, 2-dinitroethylene as an oxidant and the traditional gas generating agent taking AP as an oxidant are compared as follows:

the preparation method of the clean type gas generating agent comprises the following steps:

(1) accurately weighing the components such as the adhesive, the curing agent, the plasticizer, the oxidant, the combustion regulator, the anti-aging agent and the like according to the proportion;

(2) sequentially adding the components in the step (1) into a vertical mixer for mixing, controlling the mixing temperature to be 50-70 ℃, and mixing for 45-100 min to obtain slurry;

(3) and (3) carrying out vacuum pouring on the slurry in a dry environment, and then curing for 5-10 days in the dry environment at the temperature of about 50-70 ℃ to obtain the gas generating agent product.

The invention introduces a chlorine-free, safe and insensitive oxidant into the formula of the gas generating agent, thereby avoiding the generation of harmful gas HCl, reducing the content of residues and improving the safety performance of the formula.

The invention has the following advantages:

1. the gas generating agent of the invention is a chlorine-free gas generating agent, and harmful gas HCl is not contained in combustion products.

2. The gas generating agent of the invention has low sensitivity and higher safety performance.

3. The gas generating agent of the invention has clean product and low residue content which is below 3 percent.

4. The invention solves the problems of low burning speed and difficult ignition of the gas generating agent and realizes adjustable burning speed.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments in order to make the present invention better understood by those skilled in the art.

Example 1

The compositions of the gas generating agents using 1, 1-diamino-2, 2-dinitroethylene as the oxidizing agent are shown in Table 1, and the properties corresponding to the compositions in Table 1 are shown in Table 2.

TABLE 1 gas generant composition

TABLE 2 gas generant Performance

Example 2

The composition of the gas generating agent using 1, 1-diamino-2, 2-dinitroethylene as an oxidizing agent is shown in Table 3, and the properties corresponding to the composition of Table 3 are shown in Table 4.

TABLE 3 composition of gas generators

TABLE 4 gas generant Performance

Example 3

The compositions of the gas generating agents using 1, 1-diamino-2, 2-dinitroethylene as the oxidizing agent are shown in Table 5, and the properties corresponding to the compositions in Table 5 are shown in Table 6.

TABLE 5 gas generant composition

TABLE 6 gas generant Performance

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A clean type gas generating agent is characterized in that: comprises the following components in percentage by mass:

oxidizing agent: 70 to 85 percent

Adhesive system: 8 to 25 percent

Plasticizer: 3 to 8 percent of

Combustion regulator: 0 to 5 percent

An anti-aging agent: 0.3 to 0.7 percent;

the oxidant is 1, 1-diamino-2, 2-dinitroethylene.

2. The clean type gas generating agent as claimed in claim 1, wherein: the adhesive system includes an adhesive and a curing agent: wherein the adhesive is one or a combination of hydroxyl-terminated polybutadiene, ethylene oxide-tetrahydrofuran copolyether and poly 3, 3-bis-azidomethyloxetane-tetrahydrofuran; the curing agent is one or a combination of isophorone diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, diphenylmethane-4, 4' -diisocyanate and modified hexamethylene polyisocyanate.

3. The clean type gas generating agent as claimed in claim 1, wherein: the plasticizer is one or a combination of dioctyl sebacate, acetyl triethyl citrate, nitroglycerin and triethylene glycol dinitrate.

4. The clean type gas generating agent as claimed in claim 1, wherein: the combustion regulator is ferric oxide and/or 2, 2-bis (ethyl ferrocene) propane.

5. The clean type gas generating agent as claimed in claim 1, wherein: the anti-aging agent is methylene 4426-s and/or N-methyl paranitroaniline.

6. A method for producing a clean type gas generating agent as claimed in any one of claims 1 to 5, characterized in that: the method comprises the following steps:

(1) accurately weighing the adhesive, the curing agent, the plasticizer, the oxidant, the combustion regulator and the anti-aging agent in proportion;

(2) sequentially adding the components weighed in the step (1) into a vertical mixer for mixing, controlling the mixing temperature to be 50-70 ℃ and the mixing time to be 45-100 min, and preparing slurry;

(3) and (3) carrying out vacuum pouring on the slurry in a dry environment, and then curing for 5-10 days in the dry environment at the temperature of about 50-70 ℃ to obtain the gas generating agent product.