JP2002284595A - High-performance bursting charge composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-performance bursting charge that is a bursting charge prepared by a casting process and exhibits a high detonation characteristic of about 9,000 m/s. SOLUTION: A polymer binder that comprises a prepolymer of polyether having a terminal hydroxyl group and containing a kind or more of a nitrato group and/or azido group, a nitro-plasticizer containing a nitro group as the plasticizer for the prepolymer, and a curing agent is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a high explosive composition.

[0002]

2. Description of the Related Art PBX (Plastic Bond) obtained by mixing and solidifying cyclotrimethylenetrinitramine (also called RDX) or cyclotetramethylenetetranitramine (also called HMX) with a polymer binder is known as an explosive composition.
ed Explosive), and hexanitrohexaazaisosoultitanium, which has been developed as a higher-performance, higher-energy material, has been attracting attention. It is being actively promoted in each country.

[0003] The explosive composition explosive method is a method applied mainly when the explosive component is 90% by weight or more. The explosive component is granulated with the explosive component and a binder, and is press-molded by pressing with a press or the like. Or a method mainly applied when the explosive component is 90% by weight or less, such as a casting method in which the explosive component is mixed with a binder and a plasticizer, and then poured into a mold or pressed into the mold at a low pressure and then solidified. And used as appropriate according to the shape and use of the medicine container.

[0004]

In general, it is preferable to use the casting method for explosive containers having a complicated structure, but on the other hand, since the content of the explosive component, which is the main component, is low, the purpose and There was a problem that the detonation performance could not be obtained and the performance was degraded. As a method for solving these problems, a method using a binder containing an energy component is disclosed in Japanese Patent Publication No. 2770018. As its contents, a polyether containing a nitrate group and / or an azide group at a terminal hydroxyl group is described, and a copolymer compound of bisazidemethyloxetane and nitratomethylmethyloxetane as an example thereof, and dioctyl adipate as a plasticizer Examples of use are disclosed.

[0005] Plasticizers are added mainly for the purpose of increasing the fluidity during mixing to facilitate casting and to obtain a high density explosive with a low porosity. As a result of hard work, by choosing the right plasticizer,
The present inventors have found that an explosive composition exhibiting extremely high detonation performance can be obtained, and have accomplished the present invention.

[0006]

That is, the present invention provides an explosive composition comprising at least an explosive component as a main component, at least a terminal hydroxyl group as a polymer binder, and a nitrate group and / or an azido group. A high explosive composition comprising a prepolymer of one kind of polyether and a nitro plasticizer containing a nitro group as a plasticizer of the prepolymer. The explosive component used as a main component in the present invention is the above-mentioned cyclotrimethylenetrinitramine, cyclotetramethylenetetranitramine, hexanitrohexaazaisowurtzitanium, etc., and one or more of them are selected. Can be used. Hexanitrohexaazaisosoul titanium in particular has the highest density, detonation wave pressure and energy density among them,
Preferred as an excellent explosive component. Further, in the case of the explosive composition for increasing the bubble energy, ammonium perchlorate, metal aluminum powder and the like are used as a main component or an additive as an explosive component, and these are also applied to the explosive composition of the present invention. it can.

[0007] The prepolymer used in the present invention includes 3-azidomethyl-3-methyloxetane, glycidyl azide polymer,
3-bis (azidomethyl) oxetane, etc., which contains many azide groups, has a large energy and is liquid 3,3
Most preferred is a compound obtained by copolymerizing -bis (azidomethyl) oxetane and 3-nitratomethyl-3-methyloxetane. As the plasticizer, those not containing a nitro group such as dioctyl adipate, diethyl phthalate, di (butyl diglycol) adipate and the like are not preferable.
Bisdinitropropyl acetal, bisdinitropropyl formal, nitratoethylnitramine, 1,5-diazide-3,3-nitroazapentane, and the like are preferable, and more preferable are bisdinitropropyl formal and acetal in view of oxygen balance. It is a mixture.

It is preferable to use a curing agent in the high explosive composition of the present invention. As the curing agent, since the prepolymer has a terminal hydroxyl group, isocyanate compounds which react with this hydroxyl group, such as tolylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate diphenylmethane diisocyanate, triphenyldimethylene triisocyanate, and triphenylmethane triisocyanate are preferred. .

In addition, as a curing catalyst, an organic tin compound such as butyltin trichloride, dibutyltin diacetate and dibutyltin dilaurate, and an organic iron compound such as ferric acetylacetone and ferric diphenylacetylacetone are appropriately used. Further, as the crosslinking agent, a compound having a polyfunctional hydroxyl group, for example, trimethylolethane, trimethylolpropane, glycerin, hexatriol, diglycerin and the like, and a polyfunctional isocyanate are appropriately used.

In the present invention, the mixing ratio of the prepolymer and the nitro plasticizer is preferably in the range of prepolymer / nitro plasticizer = 0.3 to 4.0 by weight in terms of the fluidity in the casting method. Is preferred. In the present invention, it is most preferable that the ratio of the explosive component is 70 to 90% by weight and the polymer binder is 30 to 10% by weight based on the total amount of the explosive component and the polymer binder. If the amount of the polymer binder is less than 10% by weight, it becomes difficult to perform the casting method, and if it exceeds 30% by weight, the detonation performance is reduced.

Next, the casting method is most preferably used as the method for producing the high-performance explosive composition of the present invention. The casting method includes a mixing step of mixing an explosive component, which is a main component, with a polymer binder, a casting step of casting the explosive composition into a explosive container by casting, and a curing step of curing the explosive composition. In the mixing step, the explosive component is mixed with the prepolymer, nitro plasticizer, curing agent, and, if necessary, a stabilizer and a curing catalyst in a mixing tank under a pressure of 1.33 kPa or less and a temperature of about 50 ° C to 60 ° C. Is done. The mixing time is usually 30 minutes to 60 minutes, and the properties of the obtained explosive composition become slurry or colloid.

In the casting step, after the mixing step, about 60 ° C.
The explosive composition is cast by setting a medicine container in a warmed casting tank. At this time, the pressure of the casting tank may be 1.33 kPa or less, and the explosive composition may be pressurized in order to improve the castability of the explosive composition. In the curing step, the potion container after casting is transferred to a curing tank, and the temperature in the tank is usually set to about 60 ° C., and the curing is performed over several days.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

[0014]

EXAMPLES The polymer binder components were 3,3-bis (azidomethyl) oxetane and 3-nitratomethyl-3-.
48% by weight of a 7: 3 weight ratio of a copolymer of methyl oxetane, 48% by weight of a formal and acetal mixture of bisdinitropropyl containing a nitro group as a plasticizer, a curing agent isophorone diisocyanate, a crosslinking agent hexa Methylene diisocyanate polycyanate,
The curing catalyst dibutyltin dilaurate was added to 100.

After mixing the explosive component hexanitrohexaazaisosoultitanium, which is the main component, with the polymer binder of 85% by weight to 15% by weight in a kneader at 50 ° C. for about 30 minutes, an outer diameter of 42.7 mm, meat 3.6mm thick, 200m long
The solution was cured with three steel pipes having a length of m and cured. As an evaluation test of the detonation performance, for example, as a result of obtaining the detonation speed using the ion gap method described in the explosives handbook, 8,
969 m / s, 9,009 m / s and 9,010 m / s.

[0016]

COMPARATIVE EXAMPLE Dioctyl adipate, which does not contain a nitro group as a plasticizer, was used as the polymer binder component in the above Examples. The composition is 3,3-bis (azidomethy
7) 77% by weight of oxetane and 3-nitrothmethyl-3-methyloxetane in a 7 to 3 weight ratio of a copolymer compound, 15% by weight of a plasticizer dioctyl adipate, a curing agent isophorone diisocyanate, a crosslinking agent hexamethylene diisocyanate polycyanate, and curing. The catalyst dibutyltin dilaurate was added to 100.

The explosive component hexanitrohexaazaisosoultitanium, which is the main component, is mixed with a polymer binder of 85% by weight to 15% by weight at 50 ° C. for about 30 minutes in a kneader, and then the outer diameter is 42.7 mm, and the meat is 3.6mm thick, 200m long
The solution was cured with three steel pipes having a length of m and cured. As an evaluation test of the detonation performance, as a result of obtaining the detonation speed as in the example,
8,815m / s, 8,795m / s, 8,850m
/ S.

[0018]

EFFECTS OF THE INVENTION The explosive composition of the present invention has an effect of significantly improving the detonation performance as compared with the conventional explosive composition. In particular, hexanitrohexaazaisowurtzitane as an explosive component, 3,3-bis (azidomethyl) oxetane and 3-nitratomethyl- as a prepolymer
A high-performance explosive composition comprising a mixture of a formal and acetal mixture of a copolymer of 3-methyloxetane and a bisdinitropropyl containing a nitro group as a plasticizer has a detonation performance at a detonation speed of about 9,000 m / s. It is possible. Further, the explosive composition according to the present invention has a high detonation performance, and thus has a feature that the amount of the drug is small to obtain the same power as the conventional explosive. Furthermore, when stored in a metal container and detonated, it has a feature that high-speed debris is formed due to high detonation performance, and damage to a target is large.

Claims (4)

[Claims] 1. An explosive composition comprising: an explosive component as a main component; and a prepolymer of at least one polyether having a terminal hydroxyl group as a polymer binder and containing a nitrate group and / or an azido group. A high explosive composition comprising a nitro group-containing nitro plasticizer as a plasticizer for the prepolymer. 2. The high explosive composition according to claim 1, wherein the explosive component as a main component is hexanitrohexaazaisowurtzitane. 3. A polyether having a terminal hydroxyl group and containing a nitrato group and / or an azido group is a copolymer compound of 3,3-bis (azidomethyl) oxetane and 3-nitratomethyl-3-methyloxetane. The high-performance explosive composition according to claim 1 or 2, characterized in that: 4. A high explosive composition according to claim 1, wherein the nitro group-containing nitro plasticizer comprises a mixture of formal bisacylnitropropyl and acetal.