Slightly smoke type sulfur-free cyclic safety agent propellant

Abstract

The invention discloses a micro-smoke type sulfur-free cycloalkane propellant which is prepared from the following components in parts by weight: 70 parts of an oxidizing agent, 34 parts of a combustible agent, 6 parts of an adhesive, 2 parts of a stabilizing agent, 2 parts of an anti-aging agent, 1 part of a catalyst and 2 parts of a smoke suppressor, the components are uniformly mixed according to a common method, and the oxidizing agent is prepared from potassium perchlorate, ammonium perchlorate and barium nitrate in a weight part ratio of 4: 9: 1; the combustible agent comprises smokeless charcoal, potassium hydrogen phthalate, nitrocellulose, 600-mesh purified terephthalic acid and hemp stalk carbon powder in a weight part ratio of 10: 4: 10: 5: 5; the adhesive adopts high-temperature-resistant phenolic resin; the stabilizing agent adopts calcium stearate; calcium phthalate is adopted as the anti-aging agent; basic cupric carbonate is adopted as the catalyst; the smoke suppressor adopts aluminum hydroxide. On the basis of keeping the advantages of the existing sulfur-free cycloalkane propellant, the smoke transmittance of the sulfur-free cycloalkane propellant is effectively improved.

Description

Technical Field

[0001] This invention relates to a propellant for fireworks. Background Technology

[0002] On September 24, 2014, we developed and published the invention patent document "A Sulfur-Free Cyanoic Propellant"—Patent Publication No. CN104058906A. This invention cites the aforementioned patent document in its entirety. As a substitute for black powder, it has strong working power; excellent safety performance indicators; excellent storage stability; and relatively improved environmental performance. It has been widely used in the industry.

[0003] The drawback of existing sulfur-free cyclic stabilizer propellants is that, although sulfur is removed from the formula, thus avoiding the production of sulfur dioxide which is harmful to human health and pollutes the environment, the smoke concentration generated during ignition is relatively high, which can obscure the fireworks' effect and fails to effectively meet increasingly stringent requirements for ignition and environmental protection. The Analysis and Testing Center of the 204th Research Institute of China Ordnance Industry conducted tests on the "Smoke Transmittance of Propellant at 3MPa" according to Q / AY513-2011. The test results for existing sulfur-free cyclic stabilizer propellants are: infrared smoke transmittance 0%, visible light smoke transmittance 1.0%. See the table below:

[0004] Summary of the Invention

[0005] To address the aforementioned drawbacks, the technical problem to be solved by this invention is to provide an improved sulfur-free pyrotechnic propellant that effectively increases its smoke penetration rate.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a low-smoke, sulfur-free, ring-stabilizing propellant, which is composed of the following components in the indicated weight ratios: 70 parts oxidizer, 34 parts combustible agent, 6 parts binder, 2 parts stabilizer, 2 parts antioxidant, 1 part catalyst, and 2 parts smoke suppressant, mixed evenly according to conventional methods, wherein:

[0007] Oxidizing agent: A mixture of potassium perchlorate, ammonium perchlorate, and barium nitrate is used, which is mixed evenly according to general methods. The weight ratio of potassium perchlorate: ammonium perchlorate: barium nitrate is 4:9:1.

[0008] Combustible agent: A mixture of smokeless charcoal, potassium hydrogen phthalate, nitrocellulose, 600-mesh refined terephthalic acid, and hemp stalk carbon powder is mixed evenly according to general methods. The weight ratio of smokeless charcoal: potassium hydrogen phthalate: nitrocellulose: 600-mesh refined terephthalic acid: hemp stalk carbon powder = 10:4:10:5:5.

[0009] The adhesive is made of high-temperature resistant phenolic resin;

[0010] The stabilizer is calcium stearate; the antioxidant is calcium phthalate; the catalyst is basic copper carbonate; and the smoke suppressant is aluminum hydroxide.

[0011] The propellant is suitable for use in aerial shells, firework displays, beaded tubes, and aerial rocket propellants.

[0012] The beneficial effects of this invention are that the low-smoke sulfur-free cyclosulfide propellant prepared according to the formula of this invention, while maintaining the advantages of existing sulfur-free cyclosulfide propellants, effectively improves its smoke transmittance. According to the "Smoke Transmittance of Propellant at 3MPa" test conducted according to Q / AY513-2011, the test results of the low-smoke sulfur-free cyclosulfide propellant provided by this invention are: infrared smoke transmittance 5%, visible light smoke transmittance 15%. The new formula product produces less smoke during combustion, greatly improving the effect and visual appeal of fireworks displays. It also reduces PM2.5 particles and smoke in the air, making my country's fireworks industry more competitive in the international market.

[0013] The present invention will be further described below through specific embodiments. Detailed Implementation

[0014] The preparation of the low-smoke, sulfur-free cyclosporine propellant includes the following steps:

[0015] 1. Preparation of oxidizing agent: Weigh 20 parts potassium perchlorate, 45 parts ammonium perchlorate, and 5 parts barium nitrate by weight, mix them thoroughly through a three-sieve method, and set aside.

[0016] 2. Combustible agent preparation: Weigh out 10 parts smokeless charcoal, 4 parts potassium hydrogen phthalate, 10 parts nitrocellulose, 5 parts 600-mesh refined terephthalic acid, and 5 parts hemp stalk carbon powder by weight, mix them evenly through three sieves, and set aside.

[0017] 3. Weigh out 6 parts of phenolic resin, 2 parts of calcium stearate, 2 parts of calcium phthalate, 1 part of basic copper carbonate, and 2 parts of aluminum hydroxide by weight, and mix them with the above-mentioned oxidant and combustible agent to obtain a low-smoke sulfur-free cyclosporine propellant.

[0018] 4. For products requiring granulation, spray in an appropriate amount of ethanol, granulate, dry, sieve (through a 2-0.8 mesh sieve), and package to complete the production process.

[0019] To verify the product's smoke performance, the product samples prepared in the above examples were tested for "smoke transmittance of propellant at 3 MPa" according to Q / AY513-2011. The test results for existing sulfur-free cyclosporine propellants were: infrared smoke transmittance 5%, visible light smoke transmittance 15%. See the table below:

[0020]

[0021] In this invention, the combustible agent component only replaces potassium hydrogen terephthalate with smokeless charcoal; the catalyst replaces copper oxide with basic copper carbonate; the particle size of purified terephthalic acid is optimized to 600 mesh; and the binder is preferably high-temperature resistant phenolic resin; other components remain unchanged; and the ratio of oxidizer and combustible agent is adjusted. These fine-tunings effectively maintain the advantages of existing sulfur-free environmentally friendly propellants in terms of working performance, safety performance, storage performance, environmental friendliness, and stability.

[0022] Meanwhile, the test results above show that, compared with existing sulfur-free cyclosulfide propellants, the smoke transmission rate of the propellant of this invention, obtained after only minor adjustments to the formulation, has been unexpectedly greatly improved.

[0023] The above-described implementation methods are merely for clearly illustrating the technical solutions of this invention and should not be construed as limiting the invention in any way. This invention has many well-known alternatives or modifications in this technical field, all of which fall within the protection scope of this invention without departing from its essential meaning.

Claims

1. A low-smoke, sulfur-free cyclosporine propellant, comprising the following components in the indicated weight ratios: 70 parts oxidant, 34 parts combustible agent, 6 parts binder, 2 parts stabilizer, 2 parts antioxidant, 1 part catalyst, and 2 parts smoke suppressant are mixed evenly using general methods, wherein: Oxidizing agent: A mixture of potassium perchlorate, ammonium perchlorate, and barium nitrate is used, which is mixed evenly according to general methods. The weight ratio of potassium perchlorate: ammonium perchlorate: barium nitrate is 4:9:

1. Combustible agent: A mixture of smokeless charcoal, potassium hydrogen phthalate, nitrocellulose, 600-mesh refined terephthalic acid, and hemp stalk carbon powder is mixed evenly according to general methods. The weight ratio of smokeless charcoal: potassium hydrogen phthalate: nitrocellulose: 600-mesh refined terephthalic acid: hemp stalk carbon powder = 10:4:10:5:

5. The adhesive is made of high-temperature resistant phenolic resin; The stabilizer is calcium stearate; the antioxidant is calcium phthalate; the catalyst is basic copper carbonate; and the smoke suppressant is aluminum hydroxide.

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