RU2721519C1 - Electric ignition composition for cartridge primers to non-lethal weapons - Google Patents

Abstract

FIELD: pyrotechnic production.SUBSTANCE: invention relates to pyrotechnic productions, specifically to production of electric ignition compositions for cartridge primers to non-lethal weapons. Electrically ignitable composition contains colloidal gel-like lead trinitroresorcinate (TNRC) or its mixture with fine-crystal TNRC, as well as methyl cellulose as a water-soluble binder, in the form of water-based methylcellulose lacquer.EFFECT: use of water-containing initiating explosives increases safety of fabrication of components and equipment of articles due to lower sensitivity of wet compositions to all types of possible technological effects.1 cl, 1 tbl

Description

The invention relates to the field of pyrotechnic production, in particular to the production of electric igniter compositions (EMUs) used in the manufacture of electric means of initiation (SI) for non-lethal weapon systems.

Currently, there has been a certain demand for special types of ammunition for non-lethal weapons. This weapon, based on the physical principles of impact on objects, is divided into several groups. The most common group is characterized by the action of a mechanical element (specially designed rubber bullets) with limited kinetic energy, which causes severe pain when applied. The use of traumatic cartridges with electric ignition in this type of weapon requires the development of a special cartridge capsule and EMU optimized for the characteristics of a new weapon (it should provide a minimum delay between voltage supply and ignition). Existing EMU manufacturing technologies do not provide the necessary accuracy, reliability and safety, as well as the constancy of technological characteristics for use in a cartridge capsule for non-lethal weapon systems [GOST R 51611-2000, GOST R 51589-2000]. In the manufacture of EMU and equipment products remains a high risk of production at almost all stages of the process. The manufacturing technologies of domestic EMUs have the first hazard class, since they contain components sensitive to all types of possible technological influences, such as shock, friction, electrostatics, heating, etc. [OST 3-6609, OST B 84-9447].

Known igniter composition containing Berthollet salt, lead thiocyanate, lead minium in the following ratio, wt. %:

bertoletova salt 49.5 lead thiocyanate 49.5 red lead 1,0

[Bubnov P.F., Sukhov I.P. Means of initiation. Oborongiz; 1945, p. 139].

The manufacture of this composition consists in grinding and mixing the above components in a binder, nitrocellulose varnish, which is applied to the bridge of the electric igniter. The process of preparing the starting components and mixing them is fire hazardous (first or second hazard class). The high risk of the production of the composition and equipment of products affects its technical and economic efficiency and additional costs to ensure safety. This composition has lower safe and minimum tripping currents compared to the required level for electric igniters. The composition has a spread in speed of the missile elements from 10 to 15 m / s, which exceeds the range of permissible stability of the kinetic energy levels of the missile element provided by the combustion kinetics of the composition, within the framework of a confident defeat, but without a serious traumatic or fatal outcome at a distance of destruction.

The closest in technical essence is the igniter composition according to patent RU 2422756, F42B 3/12, F42C 19/12, 20.11.2006, containing lead thiocyanate, potassium perchlorate, lead chromate, a polymer binder, in the following ratio of components, wt. %:

lead thiocyanate 40-60 potassium perchlorate 35-55 lead chromate 7-30 polymer binder 1-2 over 100%.

The manufacture of this composition takes place in an aqueous medium in an apparatus with a stirrer, which indicates its reduced fire and explosion safety. The composition is more reliable in safe and minimal current. The igniter composition provides a minimum spread in speed of the missile elements of 5 m / s, which maintains the stability of the kinetic energy of the missile element provided by the combustion kinetics of the composition.

The specified composition is taken as a prototype.

The disadvantage of this composition is the complexity of the stable maintenance and reproducibility of the igniter mixture in terms of component composition. This mixture is the product of the reactions of co-precipitation of the three starting components, and the chemical kinetics of the reactions between them is a complex and multi-stage process, the component composition of which is not always stable at the output.

The technical task of the applicant, the solution of which the alleged invention is directed, is the development of EMU based on water-containing initiating explosives, which can improve the safety of manufacturing the composition and equipment of products due to the lower sensitivity of wet compositions to all types of possible technological influences.

EMU was developed on the basis of colloidal gel trinitroresorcinate of lead [Patent RU 2554649, C06B 41/02, 06/27/2015]. This product is the basis for the creation and application of wet SI equipment technology, which significantly exceeds the technology of equipment for dry igniters in terms of reliability and safety.

The problem is solved due to the fact that the EMU contains colloidal gel-like trinitroresorcinol of lead (TNRS) and methyl cellulose as a water-soluble binder, in the form of a water-based methyl cellulose varnish of 4% concentration, in the following ratio of components, wt. %:

TNRS colloidal gel or mixture 47-49 TNRS colloidal gel 28-30 and TNRS fine crystalline 18-20 Cellulose 0.5-1.5 Water (the sum of the water TNRS colloidal gel-like and varnish 4% methyl cellulose water-based) 50-52 Ratio: dry components / water 48-50 / 50-52.

During the development of EMUs, the optimal ratios of the content of components in the composition were worked out, allowing stable ignition of SR with electric ignition. With the declared parameters, a composition is obtained that retains its properties for at least six months.

Thus, to solve the technical problem, it is proposed to use in EMU:

- the basic component of TNRS colloidal gel, corresponding to the patent RU 2554649, C06B 41/02, 06/27/2015;

- methyl cellulose as a water-soluble binder, in the form of a water-based methyl cellulose varnish of 4% concentration;

- a small crystalline TNRS filler that complies with the requirements of GOST B 1944-78 with a particle size of less than 40 microns (only for an alternative variant for introducing TNRS).

The characteristics of the claimed EMU and the composition of the prototype are shown in table 1.

The use of this EMU, with a moisture content of 51 ± 1%, reduces its sensitivity to class 16 low hazard level (with impact energy from 45 to 49 J), which sharply increases to class 1 very high hazard level (with impact energy up to 2.5 J) when it is dried to moisture not more than 0.1% [OST B 84-9447] and turns into a xerogel with a density of 70 to 90% of the maximum density of the composition. A composition based on colloidal gel-like TNRS, which is in a water-suspension gel state of low sensitivity to authorized or random unauthorized technological influences, is optimal in terms of functional and energy characteristics of ignition, it allows to improve product characteristics - to increase the accuracy, reliability and safety of cartridge cartridge operation.

The use of this composition for equipping SI with electric ignition allows eliminating especially dangerous operations, reducing technological complexity, increasing technological and environmental safety by eliminating dust generation, and also improving the characteristics of electric SI.

EMU after drying in the product has a minimum spread in speed of the missile elements of 5 m / s with a standard deviation of the speed of the missile element of not more than 1.5 m / s, which maintains the stability of the kinetic energy of the missile element provided by the combustion kinetics of the composition, with a sure defeat without severe traumatic the outcome.

The characteristics of the cartridge capsule with EMU data correspond to the requirements of the technical documentation for the applied electric SI to non-lethal weapon systems.

The proposed EMU passed industrial tests and was used in electric SI for non-lethal weapon systems, which confirms the solution of the technical task and allows us to consider the proposed technical solution as meeting the criteria of the invention “industrial applicability” and “novelty”.

Sources of information:

1. Bubnov P.F., Sukhov I.P. Means of initiation, Oborongiz, 1945, p. 139

2. GOST R 51589-2000. Self-defense weapon barrelless firearms (OSA complex). General technical requirements and test methods

3. OST 3-6609-90 “Pyrotechnic compositions. Methods for determining hazardous conditions under friction

4. OST B 84-9447-90 “Pyrotechnic compositions. Methods for determining the hazard under impact. "

5. Patent RU 2422756, F42B 3/12, F42C 19/12, 11.20.2006.

6. Patent RU 2554649, C06B 41/02, 06.27.2015.

Claims (2)

Electro-ignition composition for cartridge capsules for non-lethal weapons, containing lead trinitroresorcinol (THRS), characterized in that it contains colloidal gel-like THRS or a mixture of colloidal gel-like and THRS fine crystalline and methylcellulose as a water-soluble binder, in the form of 4% methylcellulose in the following ratio of components, wt. %: TNRS colloidal gel or mixture 47-49 TNRS colloidal gel 28-30 and TNRS fine crystalline 18-20 Cellulose 0.5-1.5 Water (the sum of the water TNRS colloidal gel-like and varnish 4% methyl cellulose water-based) 50-52 Ratio: dry components / water 48-50 / 50-52