A kind of launching material for fireworks and preparation method thereof

Abstract

The invention discloses a launching material for fireworks and a preparation method thereof. The weight of each component in the launching material is: 90-95 parts of an adhesive, 1.2-5 parts of a stabilizer, 0-5 parts of a plasticizer, and 1.5-8 parts of a protective glue. The preparation method comprises the following steps: fully dissolving the stabilizer in ethanol, and dissolving the protective glue and the dehydrating agent in an aqueous medium respectively; adding water to a reaction device, heating the temperature to 45-60°C, adding an adhesive, and then adding an ethanol solution of a stabilizer and a plasticizer; adding a process solvent to the reaction device for stirring and dispersing, and then adding a protective glue solution, and stirring until the material is dispersed into small particles; heating the temperature in the reaction device to 60-75°C, then adding a dehydrating agent solution, stirring at 60-75°C and a speed of 200-800r / min for 60-150min, and then heating the temperature to 90-99°C to drive off the solvent, washing the obtained dense particles with 30-50°C water, sieving with a sieve, and then filtering and drying to obtain a final product.

Description

Technical Field

[0001] The invention relates to the field of production and manufacturing of fireworks materials, and in particular to a launching material for fireworks and a preparation method thereof. Background Art

[0002] The agents involved in fireworks mainly include black powder, single-base powder, oxidizer, metal powder, luminescent agent, binder, etc. Among them, black powder, single-base powder, potassium perchlorate, etc. are used in larger quantities. At present, the materials that are widely used in fireworks for launching are mainly black powder and single-base powder. Single-base powder is a powdered propellant obtained by crushing retired single-base propellants, which is mainly used in cold light fireworks. Black powder-based propellants have shortcomings in environmental protection, and combustion will produce a lot of smoke, affecting the viewing effect; single-base powder comes from retired single-base propellants. Although the application effect is better, the performance of retired propellants of different product numbers and batches varies greatly. Summary of the invention

[0003] The purpose of the present invention is to provide a low-cost, pollution-free, and simple-to-prepare launching material for fireworks.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] The present invention discloses a launching material for fireworks. The components in the launching material include, based on 100 parts by total weight, 90 to 95 parts of an adhesive, 1.2 to 5 parts of a stabilizer, 0 to 5 parts of a plasticizer, and 1.5 to 8 parts of a protective glue.

[0006] The adhesive is nitrocellulose, and the nitrogen content is greater than or equal to 11.7%;

[0007] The stabilizer is diphenylamine;

[0008] The plasticizer is dibutyl phthalate or N-butyl nitroxyethyl nitramine;

[0009] The protective glue is bone glue or gelatin.

[0010] The present invention provides a method for preparing a launching material for fireworks, and the specific preparation steps are as follows:

[0011] 1) Prepare ingredients according to the above formula ratio;

[0012] 2) mixing the stabilizer with ethanol to fully dissolve the stabilizer in the ethanol; dissolving the protective glue and the dehydrating agent in an aqueous medium to form corresponding aqueous solutions;

[0013] 3) adding water to the reaction device in a ratio of (5-25):1 by mass of water to binder, heating to 45-60° C., adding binder, and then adding the stabilizer ethanol solution and plasticizer obtained in step 2);

[0014] 4) adding the process solvent to the reaction device in a ratio of 2.5-12:1 by mass of the process solvent to the adhesive, stirring and dispersing, then adding the protective adhesive solution obtained in step 2), and stirring until the material is dispersed into small particles;

[0015] 5) raising the temperature in the reaction device to 60-75° C., adding the dehydrating agent aqueous solution obtained in step 2) into the reaction device in a ratio of the mass ratio of the dehydrating agent to water of (2-8):100, stirring at 60-75° C. and 200-800 r / min for 60-150 min, and then raising the temperature to 90-99° C. to drive off the solvent, thereby obtaining dense particles;

[0016] 6) washing the dense particles obtained in step 5) with 30-50° C. water, sieving with a sieve, filtering with suction, and drying to obtain the final product;

[0017] The process solvent is ethyl acetate;

[0018] The dehydrating agent is one of sodium sulfate, potassium nitrate or barium nitrate.

[0019] Beneficial effects:

[0020] 1. The present invention provides a launching material for fireworks and a preparation method thereof. The raw materials used for the launching material are from a wide range of sources. The granulation, drying and other processes are adopted, the preparation process is simple, and the granulation process is completed in the water phase, which has high safety, no special process requirements, low cost, and is easy to promote mass production.

[0021] 2. The present invention provides a propelling material for fireworks and a preparation method thereof. Compared with black powder and retired single-base powder, the propelling material has the advantages of low hygroscopicity, stable performance, good quality consistency, etc. In addition, the material does not contain sulfur, does not produce residue during combustion, has good environmental protection effects, and can be widely used in propellants for fireworks and firecrackers. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with specific embodiments, but the specific embodiments do not limit the present invention in any form.

[0023] Example 1

[0024] (1) Molding preparation

[0025] Solution preparation: add 1.5 parts of diphenylamine to 50 parts of ethanol and stir to form a diphenylamine solution; add 7.5 parts of bone glue to 50 parts of 60°C water and stir to form a bone glue solution; add 21 parts of sodium sulfate to 50 parts of water to form a sodium sulfate solution.

[0026] Granulation: Add 70 parts of nitrocellulose to 50℃ water, stir and disperse, add the prepared diphenylamine solution, stir and disperse evenly, then add ethyl acetate, continue to stir and disperse until the nitrocellulose is dissolved, then add the gelatin solution and stir until it is completely spherical. Add sodium sulfate solution, heat to 95℃ while stirring, and form particles with a certain density.

[0027] (2) Post-processing

[0028] The particles obtained above were washed with 40°C warm water, and sieved with sieves of different mesh sizes, and then filtered to remove most of the water, and the obtained particles were dried at a drying temperature of 80°C to obtain the final product.

[0029] Example 2

[0030] (1) Molding preparation

[0031] Solution preparation: add 1.5 parts of diphenylamine to 50 parts of ethanol and stir to form a diphenylamine solution; add 5.5 parts of bone glue to 50 parts of 60°C water and stir to form a bone glue solution; add 18 parts of sodium sulfate to 50 parts of water to form a sodium sulfate solution.

[0032] Granulation: Add 75 parts of nitrocellulose to 50℃ water, stir and disperse, add the prepared diphenylamine solution, stir and disperse evenly, then add ethyl acetate, continue to stir and disperse until the nitrocellulose is dissolved, then add the gelatin solution and stir until it is completely spherical. Add sodium sulfate solution, heat to 95℃ while stirring, and form particles with a certain density.

[0033] (2) Post-processing

[0034] The particles obtained above were washed with 40°C warm water, and sieved with sieves of different mesh sizes, and then filtered to remove most of the water, and the obtained particles were dried at a drying temperature of 80°C to obtain the final product.

[0035] Example 3

[0036] (1) Molding preparation

[0037] Solution preparation: add 1.5 parts of diphenylamine to 50 parts of ethanol and stir to form a diphenylamine solution; add 6.5 parts of bone glue to 50 parts of 60°C water and stir to form a bone glue solution; add 20 parts of sodium sulfate to 50 parts of water to form a sodium sulfate solution.

[0038] Granulation: Add 70 parts of nitrocellulose to 50℃ water, stir and disperse, add the prepared diphenylamine solution and 2 parts of dibutyl phthalate in turn, stir and disperse evenly, then add ethyl acetate, continue to stir and disperse until the nitrocellulose is dissolved, then add the gelatin solution and stir until it is completely spherical. Add sodium sulfate solution, heat to 95℃ while stirring, and form particles with a certain density.

[0039] (2) Post-processing

[0040] The particles obtained above were washed with 40°C warm water, and sieved with sieves of different mesh sizes, and then filtered to remove most of the water, and the obtained particles were dried at a drying temperature of 80°C to obtain the final product.

[0041] According to the national military standard 770B density test method, the national military standard 770B hygroscopicity test method, the national military standard 770B explosion heat test method, and the GJB772A mechanical sensitivity test method, the fireworks launching materials prepared in the above Examples 1-3 were tested and the results are shown in Table 1.

[0042] Table 1 Test results of Examples 1-3

[0043]

Claims

1. A launching material for fireworks, characterized in that: The components in the emission material include, based on 100 parts by total weight, 90 to 95 parts of adhesive, 1.2 to 5 parts of stabilizer, 0 to 5 parts of plasticizer, and 1.5 to 8 parts of protective glue; The adhesive is nitrocellulose, and the nitrogen content is greater than or equal to 11.7%; The stabilizer is diphenylamine; The plasticizer is dibutyl phthalate or N-butyl nitroxyethyl nitramine; The protective glue is bone glue or gelatin.

2. A method for preparing a launching material for fireworks, characterized in that: The specific preparation steps are as follows: 1) Prepare ingredients according to the above formula ratio; 2) mixing the stabilizer with ethanol to fully dissolve the stabilizer in the ethanol; dissolving the protective glue and the dehydrating agent in an aqueous medium to form corresponding aqueous solutions; 3) adding water to the reaction device in a ratio of (5-25):1 by mass of water to binder, heating to 45-60° C., adding binder, and then adding the stabilizer ethanol solution and plasticizer obtained in step 2); 4) adding the process solvent to the reaction device in a ratio of 2.5-12:1 by mass of the process solvent to the adhesive, stirring and dispersing, then adding the protective adhesive solution obtained in step 2), and stirring until the material is dispersed into small particles; 5) raising the temperature in the reaction device to 60-75° C., adding the dehydrating agent aqueous solution obtained in step 2) into the reaction device in a ratio of the mass ratio of the dehydrating agent to water of (2-8):100, stirring at 60-75° C. and 200-800 r / min for 60-150 min, and then raising the temperature to 90-99° C. to drive off the solvent, thereby obtaining dense particles; 6) washing the dense particles obtained in step 5) with 30-50° C. water, sieving with a sieve, filtering with suction, and drying to obtain the final product; The process solvent is ethyl acetate; The dehydrating agent is one of sodium sulfate, potassium nitrate or barium nitrate.

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