Priming mix

a technology of priming mix and priming compound, which is applied in the direction of looms, explosives, textiles and papermaking, etc., can solve the problems of increasing the reactivity of the priming mix that is neither sufficient nor desirable, and the incidence of accidental firing of the cartridge or shell increases, so as to improve the balance sensitivity, stability, and other desirable properties

Inactive Publication Date: 2011-01-20
OLIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]There is a continuing search for improved priming mixes with an improved balance sensitivity, stability, and other desirable properties.

Problems solved by technology

This mechanical energy deforms the cup, compressing the priming mix and generating heat, causing the priming mix to ignite.
Merely increasing the reactivity of the priming mix is neither sufficient nor desirable, because it could increase the incidence of accidental firing of the cartridge or shell.
This primary explosive in almost all cases must be modified because it is too powerful or its velocity of detonation is too high.

Method used

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Examples

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example 1

[0027]In a first preferred embodiment, a priming mix is made with from 30% to 40% lead styphenate, 2% to 6% tetrazene, 0% to 6% PETN, 3% to 8% superfines; 2% to 5% aluminum, and 35% to 55% Ba(NO3)2. More specifically, an exemplary priming mix was made with about 35% lead styphenate, about 5% tetrazene, about 3% PETN, about 5% propellant superfines, about 3% aluminum, and about 50% Ba(NO3)2.

[0028]More specifically, an exemplary composition of a priming mix and a control of the compositions shown in Table 1 were prepared, and tested in three sets of steel die drop tests. The results of which are reported in Table 2.

[0029]As shown in Table 2, the performance of the exemplary composition is superior at 5″, where there was at least one misfire out of fifty for the control in each set compared to no misfire for the exemplary composition; at 4″, where there was at least eight and as many as eighteen misfires out of fifty for the control in each set, compared to a maximum of four misfires o...

example 2

[0030]A primer composition was prepared with the following composition:[0031]35% KDNBF[0032]4% Tetrazene[0033]5% superfines[0034]15% iron sulfide (ferrous sulfide) FeS[0035]41% Potassium Nitrate KNO3

example 3

[0036]A primer composition was prepared with the following composition:[0037]42% KDNBF[0038]6% Tetrazene[0039]8% superfines[0040]7% Boron[0041]37% Potassium Nitrate KNO3

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PUM

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Abstract

An improved priming mix of the type including an initiator, fuel, and oxidizer, and pyrotechnic component. The improvement being the inclusion of between about 3% and about 20% propellant superfines, the superfines comprising particles less than 100 μm.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority to prior provisional application Ser. No. 61 / 226,496, filed Jul. 17, 2009, the entire contents of which are incorporated herein by reference.FIELD[0002]The present disclosure relates to priming mixes or priming compounds, and in particular to priming mixes with improved sensitivity.BACKGROUND[0003]The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.[0004]Priming mixes or priming compositions are used in ammunition cartridges, including both center fire and rim fire, shot shells, and loads for power tools and power actuated devices to initiate the combustion of the propellant in the cartridge or shell. The priming mix is disposed in a priming cup at the back of the cartridge or shell. Ignition of the primer is initiated by the impact of a weapon's firing pin on the cup. This mechanical energy deforms the cup, compressing the ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C06B41/06C06B47/10C06B47/08
CPCC06C7/00C06B45/02
Inventor MEI, GEORGE C.LOWE, DUANE E.
Owner OLIN CORP
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