SE460901B - WATER RESISTANT ELASTIC EXPLOSIVE MATERIAL - Google Patents

Abstract

Explosive material consisting of one or several self-detonating explosives, such as PETN, HMX, TNT or RDX, desensitized by wax or water and one or several inert materials. The invention is characterized in that the inert material or a part thereof consists of a rubber of the type silicone rubber or latex rubber, which inert material constitutes matrix or binding agent, and that components comprised after being mixed together constitute a compound, which can be cast, extruded or rolled-out.

Description

460 901 and is characterized in that the inert material or a part thereof consists of a rubber of the type silicone rubber or latex rubber, which inert material constitutes a matrix or binder and in that constituent components after mixing form a castable, extrudable or selectable mass.

Thus, either silicone rubber or latex rubber can be used as matrix and binder. Both materials are environmentally friendly, non-toxic and do not cause dangerous temperature increases during curing. They are completely inert to explosives such as PETN, TNT, HHX or RDX. When casting with silicone rubber or latex, e.g. wax phlegmatized PETN is used.

When casting with latex, water phlegmatized explosives can also be used.

However, latex rubber is limited to the casting of thin layers as evaporation of water must be possible during curing. Thicker layers can, however, be obtained by stacking or wrapping several hardened thin layers on top of each other.

In the case of both silicone and latex rubber, additional additives can be made, e.g. metal powders for regulating the density or microspheres of plastic or glass for regulating the initiability.

Below are a number of examples of explosive material according to the invention.

Example I The following ingredients were weighed and mixed: 37.62 wax phlegmatized PETN (72 wax) 15% iron powder 6.0% microspheres of glass or silicone rubber The mixture was cast in molds into 25 mm layers. The solidified explosive bodies detonated at a speed of 3700 m / s Example 2 The following ingredients were weighed and mixed: 87% wax phlegmatized PETN 13% latex The mixture was cast to the layer thickness Bmm. Strips of l6mm width were initiated with detonator and detonated at a speed of 7800 m / s. a 3 in 460 901 Example gel 3 A mixture according to example 1 was cast in 3 mm layers.

A stack of S strips, 16 mm wide, was detonated at a speed of 3500 m / s.

Example gel Å A mixture of: # 32 water-phlegmated HHX 13.72 iron powder 5.92 microspheres of glass The mixture was cast on gauze to a strip of 3 mm thickness and covered after the casting of another gauze. The gauze was intended as mechanical reinforcement. 5 strips 50 mm wide were stacked on top of each other and initiated. The velocity of the detonation was measured at 3ü00 m / s. When another S0 mm wide strip was wound S superimposed turns around a cardboard tube of 100 mm diameter and detonated, the same detonation rate was obtained.

Thus, with silicone or latex type rubber, explosive materials with different thicknesses and properties can be manufactured in a simple manner. Charges of the type prepared according to the recipe according to Example I above have been shown to detonate readily at a water depth of H50 meters, immersed in a water-filled mine. Charges that had been immersed for a period of one month could also be detonated without any problems.

According to a preferred embodiment, in addition to said rubber, as mentioned, the inner material consists of a metal powder and / or hollow microspheres of glass or plastic.

According to a further preferred embodiment, there is a mechanical reinforcement of a fabric, threads or fibers of textile material or glass fibers embedded in the explosive material.

Through experiments performed, the inventor has found that in the case of explosive material containing latex, a rapid solidification on the surface can take place if the material is brought into contact with acetone, el. alcohol. For example, the strings with a diameter of 7 m have been extruded into a bath of acetone. Due to the surface stiffness, the strings became so manageable that they could be wound on a drying wind. This condition considerably facilitates mass production of the explosive material. 460 901 According to a preferred embodiment, the explosive material is therefore designed in such a way that, in the case where the matrix or binder consists of latex, a surface. rapid solidification of the explosive material occurred by the action of a coagulating liquid such as acetone or alcohol.

Claims (3)

460,901 Patent claims 1. Explosives material consisting of one or more self-detonating wax or water phlegmatized explosives such as PETN, HHX, TNT or RDX and one or more inert materials, characterized in that the inert material or a part thereof consists of a silicone type rubber rubber or latex rubber, which inert material constitutes a matrix or binder, and that the constituent components after mixing together form a castable, extrudable or selectable mass. 2. An explosive material according to claim 1, characterized in that the inert material in addition to said rubber consists of a metal powder and / or hollow microspheres of glass or plastic. 3. Explosive material acc. Claim 1 or 2, characterized in that a mechanical reinforcement of a fabric, threads or fibers of textile material or glass fibers is present embedded in the explosive material. ß Explosive material acc. claim 1, 2 or 3, in which case the matrix or compound consists of latex, characterized in that a superficial rapid solidification of the explosive material has taken place by the action of a coagulating liquid such as acetone or alcohol.