JP2869734B2 - Method for producing high explosive charge composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to a composition of a high explosive charge that can be manufactured safely.

<Conventional technology> Trimethylene trinitroamine (R) based on trinitrotoluene (TNT) as a high explosive
Compositions comprising DX) or cyclotetramethylenetetranitroamine (HMX) and a wax are known.

An explosive composition is also known in which RDX is a main component and bisdinitroacetal / formal, polyethylene glycol (PEG), trimethylolpropane (TMP) and tolylene diisocyanate (TDI) are binders.

<Problem to be Solved by the Invention> In the above-mentioned known composition, the former is manufactured by a filling method.
Since the explosive performance of the explosive is higher as the density of the explosive is closer to the theoretical density, the explosive is cooled gradually while warming it in order to obtain a high detonation speed.

However, during cooling, the volume of the explosive is reduced, and heat is concentrated at the center to form a cavity, which makes it difficult to obtain an explosive with a high charge density.

On the other hand, the latter composition is PBX (Plastic Bonded Explosive), which can be cast and has high safety, but its explosion performance was limited to a detonation speed of 7900 m / s.

Therefore, there has been a demand for the development of a method for producing an explosive that can be formed into an arbitrary shape with a high explosion speed exceeding 7900 m / s and high safety during production.

<Means for Solving the Problems> The present inventors have studied over a long period of time a method for producing an explosive composition that satisfies the above-mentioned needs, and as a result, completed the present invention.

That is, the present invention provides cyclotetramethylene nitramine as a main component,
Or 50-90% by weight of one or more nitro plasticizers selected from the group consisting of trimethylenetrinitroamine, trimethylolethanetrinitrate, triethylene glycol dinitrate and diethylene glycol dinitrate, and polyethylene A binder comprising 10 to 50% by weight of a polyurethane resin comprising glycol, trimethylolpropane, and a curing agent is mixed so that the binder becomes 10 to 30% by weight of the total amount of the main component and the binder to form an explosive slurry. A high explosive charge composition comprising: a mixing step for obtaining, a casting step for injecting and casting the explosive slurry obtained in the mixing step into a container, and a curing step for heating the container after the casting step to cure the explosive slurry. The present invention relates to a method for manufacturing a product.

HMX and RDX used as the main components used in the present invention may be used alone or as a mixture.

Further, the particle size of HMX and RDX and the compounding ratio thereof can be appropriately selected from manufacturability, explosive performance and the like. Usually, for example, those having an average particle size of 200 μm, 15 μm, 3 μm or less are used in combination.

For example, when using HMX, the average particle size 200μm / 15μ
m is 6/4 to 8/2 (the same applies to the weight ratio or less), when RDX is used, the average particle diameter is 200 μm / 15 μm is 6/4 to 8/2, or the average particle diameter is 15 μm
6/4 to 9/1 or the like for / 3 μm or less.

The binder used in the method of the present invention is characterized by containing a specific nitro plasticizer and a polyurethane resin.

Specific nitro plasticizers include TMETN, TEGDN,
DEGDN. These nitro plasticizers are used as one kind or as a mixture of two or more kinds.

The polyurethane resin includes, for example, polyethylene glycol (PEG), trimethylolpropane (TMP) and a curing agent.

Examples of the curing agent include isocyanate compounds such as tolylene diisocyanate (TDI), diphenylmethane diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate.

The ratio of the curing agent to PEG or the like is usually the molar ratio of each isocyanate group and hydroxyl group, and isocyanate group / hydroxyl group =
0.8 to 1.2.

If it does not reach 0.8 or exceeds 1.2, the explosive after curing becomes soft, and it becomes difficult to mold it into an arbitrary shape.

In the present invention, a resin compatible with a nitro plasticizer other than the polyurethane resin may be used.

The mixing ratio of nitro plasticizer and polyurethane resin is usually by weight ratio, nitro plasticizer / polyurethane resin = 9/1
Must be ~ 5/5.

If there is more nitro plasticizer than 9/1, the nitro plasticizer will separate after curing.

If the amount of nitro plasticizer is less than 5/5, the viscosity of the explosive slurry becomes high and casting becomes difficult.

Further, in the composition of the present invention, besides the above-mentioned components, as a stabilizer, for example, ethylcentralit or resorcinol can also be added, and as a curing catalyst, for example, ferric acetylacetonate, copper acetylacetonate, or the like is added. You can also. Their addition amount is 0.3% by weight or less of the total amount of the main component and the binder.

In the method of the present invention, the components are mixed so as to have a ratio of 70 to 90% by weight of the main component and 30 to 10% by weight of the binder based on the total amount of the main component and the binder. If the binder content is less than 10% by weight, high explosive charges cannot be produced because casting is impossible. If it exceeds 30% by weight, high explosive charges cannot be obtained.

In the mixing step, the nitro plasticizer, PEG and TMP are mixed,
If necessary, a stabilizer and a curing catalyst are added and mixed.
Next, HMX and / or RDX are mixed, and then a curing agent is mixed.

The mixing is performed at a pressure of 10 torr or less at a temperature of 60 ± 5 ° C. The mixing time is, for example, 30 minutes or more for the first mixing, 60 minutes or more for mixing with HMX or the like, and mixing after adding a curing agent. Is more than 30 minutes.

Next, in the casting process, set the casting container in the casting tank warmed to about 60 ° C, put the explosive slurry obtained in the mixing step from the casting hopper, and cast the casting tank to a pressure of 10 torr or less. Perform

In the curing step, the casting container after casting is transferred to a carrying tank, and the temperature in the tank is usually set to about 60 ° C., and the curing is performed for 6 days or more.

<Effect of the Invention> In the method for producing a high explosive explosive composition of the present invention, safe casting is possible, and the composition is produced safely, and the obtained composition has a high explosive speed exceeding 7900 m / s. Have.

Further, since the explosive composition obtained by the method of the present invention has a high explosive speed, the explosive composition is characterized in that a small amount of the drug is required to obtain the same power as a conventional explosive.

In addition, when the explosive obtained by the method of the present invention is stored in a metal case and detonated, it has a high explosion speed, so that high-speed fragments are formed and damage to a target is large.

<Examples> Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

Example 1 An explosive having the composition shown in the table of Example 1 was produced as follows.

 First, the mixing step will be described.

That is, trimethylolethanetrinitrate (TMET
N) 10.5 parts by weight, triethylene glycol dinitrate (TEGDN) 1 part by weight, diethylene glycol dinitrate (DEGDN) 1 part by weight, polyethylene glycol (P
EG) 3 parts by weight and trimethylolpropane (TMP) 0.5 part by weight were mixed at a temperature of 60 ° C. under a pressure of 8 torr for 4 minutes.

Subsequently, 83 parts by weight of trimethylenetrinitroamine (RDX) (200 μm / 15 μm = 7/3 weight ratio) was added and mixed at the same pressure and the same temperature for 60 minutes.

Next, 1 part by weight of tolylene diisocyanate (TDI) was added, and mixed at the same pressure and the same temperature for 30 minutes.

Next, the mixture was transferred to a casting hopper warmed to 58 ° C., and the casting vessel was cast at a pressure of 6 torr and a temperature of 60 ° C. At that time, after completion of the casting, the mixture was left at the same pressure and the same temperature for 30 minutes to sufficiently remove bubbles.

After that, transfer the casting container to the carrying tank,
For 7 days.

The following test was performed on the explosive obtained by the method of the present invention in this manner. The manufacturability and the results of each test for the examples and comparative examples are shown in the table.

Dropping sensitivity test: A dropping weight of 2.5 kg is dropped on a sample having a thickness of about 0.2 mm (30 to 35 mg), and the drop height at which the sample ignites 50% is determined. that time,
Conditions with sandpaper under sample (Method 12)
And the condition without sandpaper (Method 12B).

Friction sensitivity test: According to JIS K4810-79. Approximately 0.2mm in thickness (30-35mg)
Using a BAM type friction tester, the sample of
Find f).

Weak tube sensitivity test: A sample was loaded into a 50 mm long 32A iron tube, adjusted to 20 ° C, detonated on an explosion judgment lead plate (thickness: 5 mm), and the explosion was judged by the lead plate explosion marks. Find the number of the detonator.

Hot-ball drop test: A heated thermo-ball (JIS B1501 ball bearing nominal diameter 1/4 inch) is dropped on a sample of about 4 g, and the boundary temperature between ignition, partial ignition and unignition is determined.

Explosion velocity test: A sample is loaded into a 200 mm long 32A steel pipe, and the explosion velocity is measured using the ion gap method.

Examples 2 to 6 Explosives having the compounding compositions of Examples 2 to 6 shown in the table were produced according to Example 1. However, cyclotetramethylenetetranitroamine (HMX) is 200μm / 15μm = 6/4 (weight ratio)
Was used.

The same test as in Example 1 was performed for each explosive. The results are shown in the table.

Comparative Example 1 The composition of Comparative Example 1 shown in Table except that 19 parts by weight of conventionally used bisdinitropropyl acetal / formal (BDNPA / F) was used instead of the nitro plasticizer used in the present invention. An explosive was manufactured according to Example 1 in composition.

The same test as in Example 1 was performed on the obtained explosive. The results are shown in the table.

Comparative Examples 2 and 3 Explosives were produced according to Example 1 except that the amount of the binder was changed to 7 parts by weight (Comparative Example 2) and 60 parts by weight (Comparative Example 3).

However, in Comparative Example 2, production was interrupted halfway because the slurry viscosity was too high to cast.

In Comparative Example 3, after the mixing was completed, the main component and the binder component were separated into two layers, and a uniform explosive could not be obtained.

Furthermore, the abbreviations in the table indicate the following compounds, respectively.

HMX: cyclotetramethylenetetranitroamine RDX: trimethylenetrinitroamine TMETN: trimethylolethanetrinitrate TEGDN: triethylene glycol dinitrate DEGDN: diethylene glycol dinitrate BDNPA / F: bisdinitropropyl acetal / formal PEG: Polyethylene glycol TMP: Trimethylolpropane TDI: Tolylene diisocyanate
It is higher than 8000m / s, and shows high safety. On the other hand, in Comparative Example 1, the productivity and safety are not particularly problematic, but the explosion speed is slow. Furthermore, the comparative rows 2 and 3 did not obtain any samples that could be tested.

The examples and comparative examples show that the explosive exceeds 7900 m / s only when produced by the method of the present invention, and that a highly safe explosive can be obtained.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kazushi Tokita 2-34 Rokukanyama, Taketoyo-cho, Chita-gun, Aichi (56) References JP-A-2-157177 (JP, A) JP-A-63-40790 (JP) JP, A) JP-A-62-41791 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C06B 21/00 C06B 25/34 C06B 45/00 CA (STN) REGISTRY (STN ) WPIDS (STN)

Claims (2)

(57) [Claims] 1. The method according to claim 1, wherein the main component is cyclotetramethylene nitramine and / or trimethylene trinitroamine, and trimethylolethanetrinitrate, triethylene glycol dinitrate and diethylene glycol dinitrate. One or two or more nitro plasticizers, 50 to 90% by weight, a polyethylene-based resin comprising polyethylene glycol, trimethylolpropane, and a curing agent, and a binder comprising 10 to 50% by weight. A mixing step of mixing the powder so as to have a concentration of 10 to 30% by weight to obtain an explosive slurry, a casting step of injecting and pouring the explosive slurry obtained in the mixing step into a container, and heating the container after the casting step. And a curing step of curing the explosive slurry by heating. 2. The composition according to claim 1, wherein the ratio of the average particle size of the main component cyclotetramethylenetetranitroamine and / or trimethylenetrinitroamine to 200 μm and 15 μm is 6/4 to 8/2 by weight. How to make explosive charges.