RU2633920C1 - BALL POWDER FOR 5,6 mm SPORTS HUNTING CARTRIDGE OF RING IGNITION - Google Patents

Abstract

FIELD: weapon and ammunition.

SUBSTANCE: invention relates to spherical powder for 5.6 mm sports-hunting cartridges of circular ignition. Spherical powder for 5.6 mm sports and hunting cartridge for annular ignition contains cellulose nitrate with a nitrogen oxide content of at least 210.5 ml NO/g, diphenylamine, moisture, ethyl acetate, graphite, as well as an LD-70 composition consisting of diethylene glycol dinitrate and triethylene glycol dinitrate.

EFFECT: preparation of spherical powder for 5,6 mm sports-hunting cartridge of annular ignition without the stage of phlegmatization by introducing a volume inhibitor of combustion in the formation phase.

1 tbl, 5 ex

Description

The invention relates to the field of production of spherical powders (TFP) for sports and hunting cartridges of annular ignition.

Spherical gunpowder is known that contains, as its main energy components, cellulose nitrate (SC) and nitroglycerin, as well as a chemical stability stabilizer, processing aids (ethyl acetate, water), combustion catalysts or phlegmatizers [1-5]. These powders do not meet the requirements of ballistic characteristics for 5.6 mm sporting and hunting cartridges due to excess pressure of the powder gases, and in order to ensure the corresponding progressiveness of combustion, they must be phlegmatized, and this leads to additional labor costs.

The closest technical solution (prototype) [6] is a spherical pyroxylin powder for 5.6 mm sporting rifle cartridge, including cellulose nitrate, diphenylamine, carbon black, graphite, ethyl acetate, moisture, dinitrotoluene in the following ratios of components, wt.%:

total carbon black and graphite 0.3 ... 0.8 diphenylamine 0.4 ... 0.8 ethyl acetate 0.3 ... 0.9 moisture 0.3 ... 0.6 dinitrotoluene 0.2 ... 1.0 nitric oxide cellulose nitrate not less than 213.0 ml NO / g rest

The disadvantage of the prototype is phlegmatization with dinitrotoluene.

The objective of the invention is the development of TFP for 5.6 mm hunting and hunting cartridges of annular ignition without a stage of phlegmatization by introducing a volumetric combustion inhibitor at the formation phase.

The problem is solved due to the fact that the spherical powder for 5.6 mm of a sports and hunting cartridge of ring ignition, including cellulose nitrate, diphenylamine, moisture, ethyl acetate, graphite, additionally contains a two-component composition LD-70, consisting of 30% diethylene glycol dinitrate and 70% triethylene glycol dinitrate [7] in the following ratio of components, wt.%:

LD-70 25.0 ... 41.0 diphenylamine 0.5 ... 1.1 moisture 0,1 ... 0,3 ethyl acetate, no more 0.3 graphite 0,1 ... 0,2 nitric oxide cellulose nitrate no less than 210.5 ml NO / g rest

LD-70 allows you to adjust the nature of combustion due to the compaction of the structure of the granules.

Due to the slowly burning volumetric structure of the powder elements, the effect of increasing the progressiveness of combustion is achieved. Traditional phlegmatizers (centralitis I, DNT, DBP, etc.) are energetically ballast substances, the introduction of which into the outer layers of the powder elements reduces the burning rate of the latter by reducing calorie content. LD-70 acts as an energy plasticizer and a volumetric combustion inhibitor, and as a result, the need for phlegmatization with dinitrotoluene is eliminated.

The developed gunpowder is made according to standard water dispersion technology - by mixing cellulose nitrates, diphenylamine, two-component composition LD-70 in water, dissolving these components in ethyl acetate with the formation of powder varnish, followed by dispersion of the varnish onto particles, distilling off the solvent, drying and graphitizing the particles.

The complexity of manufacturing is reduced by 8.6%.

The increase in the content of LD-70 more than 41.0 wt.% Leads to the exudation of LD-70. The decrease in LD-70 less than 25.0 wt.% Does not provide the necessary density of the granules.

An increase in the content of diphenylamine (DPA) of more than 1.1 wt.% Is impractical, since this leads to a decrease in the energy characteristics of the powder. A decrease in DPA of less than 0.5 wt.% Reduces the chemical resistance of the powder.

Ethyl acetate and water are the technological components remaining in the powder after its manufacture. Their content is determined by the conditions for the formation of granules. The mass fraction of moisture depends on the conditions of dehydration and drying, but should not be higher than 0.3 wt.%, So as not to reduce the energy characteristics of the powder. A decrease in moisture of less than 0.1 wt.% Lengthens the drying process.

Graphite is used as an antistatic additive to reduce the electrified powder granules and improve flowability.

The table shows the compositions of the TFP within the boundary conditions and beyond.

These gunpowder compositions were tested in a 5.6 mm Hunting 370 annular sporting and hunting cartridge with a bullet weight of 2.43 ± 0.01 g.

From the data of the table it can be seen that the gunpowder made according to the claimed composition provides a bullet speed at a distance of 10 m from the muzzle end of 353-360 m / s with a pressure of powder gases of 109.47-107.8 MPa (examples 1-3), which in turn, is the optimal ballistic characteristics.

Gunpowder made outside the boundary conditions burn more degradingly (examples 4, 5) and an increase in charge mass is observed.

Information sources

1. RF patent No. 2268869 (2006), IPC С06В 25/24. Spherical gunpowder.

2. RF patent No. 1784117 (1992), MKI C06B 25/18. Spherical pyroxylin powder for 5.6 mm sports rifle cartridge.

3. RF patent No. 1808191 (1992), MKI C06B 25/22. Spherical pyroxylin powder for 5.6 mm sports rifle cartridge.

4. RF patent No. 2421433 (2011), IPC С06В 25/24. Spherical gunpowder.

5. RF patent No. 2456258 (2012), MKI C06B 25/18. Spherical pyroxylin gunpowder for 5.6 mm rifle ring sport ignition cartridge.

6. RF patent No. 1808191 (2003), IPC С06В 25/22. Spherical pyroxylin powder for 5.6 mm sports rifle cartridge.

7. Malkov G.V. et al. “Study of the properties and prospects of the use of hyperbranched poly (1,3,5-triazine-1,2,3-triazoles)”, Electronic Journal, Structure and Dynamics of Molecular Systems (theses of conferences and seminars). Kazan, KFU, 2008, 3, part A, section 2, p. 146-149.

Claims (2)

Spherical gunpowder for 5.6 mm annular sports and hunting cartridge, including cellulose nitrate with a nitric oxide content of at least 210.5 ml NO / g, diphenylamine, moisture, ethyl acetate, graphite, characterized in that as an energy plasticizer and volume inhibitor the combustion contains a two-component composition LD-70, consisting of diethylene glycol dinitrate and triethylene glycol dinitrate in the following ratio of components, wt.%: LD-70 25.0-41.0 diphenylamine 0.5-1.1 moisture 0.1-0.3 ethyl acetate, no more 0.3 graphite 0.1-0.2 nitric oxide cellulose nitrate no less than 210.5 ml NO / g rest