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Compound plasticizer for cast explosive and preparation method of compound plasticizer

A composite plasticizer and explosive technology, which is applied in the direction of non-explosive/non-thermal agent components, explosives, offensive equipment, etc., can solve the problems of air holes and affect the quality of charge, and achieve low oil permeability and high solid content of explosives , the effect of low acidity

Active Publication Date: 2017-05-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, moisture will react with the isocyanate curing agent to generate carbon dioxide gas, resulting in pores in the charge, which seriously affects the quality of the charge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] According to the second aspect of the present invention, the present invention provides a method for preparing a composite plasticizer for pouring explosives, the method comprising: performing decompression, heating, and rotary evaporation on the first ester compound and the second ester compound , obtaining the composite plasticizer;

[0021] Wherein, the first ester compound is dioctyl adipate, and the second ester compound is selected from at least one of isodecyl ester and lauryl ester; based on the total weight of the composite plasticizer, The content of the first ester compound is 1-99% by weight, and the content of the second ester compound is 1-99% by weight.

[0022] Preferably, based on the total weight of the composite plasticizer, the content of the first ester compound is 20-80% by weight, and the content of the second ester compound is 20-80% by weight.

[0023] In addition, the specific elaboration and preferred conditions of the first ester compound an...

Embodiment approach

[0026] According to a preferred embodiment, the preparation method of the present invention specifically includes the following steps:

[0027] 1) Vacuumizing: sealing the first ester compound and the second ester compound in a rotary evaporator, and vacuumizing;

[0028] 2) Revolving steaming treatment: at 50-100° C., the first ester compound and the second ester compound are revolving evaporated.

[0029] In step 1), the vacuum is such that the vacuum degree of the rotary evaporator can be -0.1 to 0 MPa, and the purpose is to completely remove the air in the rotary evaporator.

[0030] In step 2), the temperature of the rotary steaming treatment is preferably 75-95°C.

[0031] In step 2), the rotational speed of the rotary steaming treatment may be 10-100 rpm, preferably 20-60 rpm.

[0032] In step 2), the time for the rotary steaming treatment may be 1-4 hours, preferably 2-3 hours.

[0033] According to the third aspect of the present invention, the present invention pr...

Embodiment 1

[0049] This example is used to illustrate the composite plasticizer for pouring explosives of the present invention and its preparation method.

[0050] The composite plasticizer contains dioctyl adipate and isodecyl nonanoate; based on the total weight of the composite plasticizer, the content of dioctyl adipate is 65% by weight, and isodecyl nonanoate The content is 35% by weight.

[0051] Above-mentioned composite plasticizer is prepared by following specific operations:

[0052] Step 1: Seal dioctyl adipate and isodecyl nonanoate in a rotary evaporator, and use a vacuum pump to depressurize the rotary evaporator to -0.09MPa;

[0053] Step 2: Heating the temperature to 90° C., adjusting the rotation speed of the rotary steamer to 30 rpm, and rotary steaming for 2 hours, so as to obtain the composite plasticizer A.

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Abstract

The invention provides a compound plasticizer for cast explosive and a preparation method of the compound plasticizer. The compound plasticizer contains first ester compounds and second ester compounds, wherein the first ester compounds are dioctyl adipate, and the second ester compounds are selected from at least one of isodecyl ester and glycerol trilaurate; in terms of total weight of the compound plasticizer, the content of the first ester compounds is 1%-99% by weight, preferably, 20%-80% by weight, and the content of the second ester compounds is 1%-99% by weight, and preferably, 20%-80% by weight. The preparation method comprises steps as follows: the first ester compounds and the second ester compounds are subjected to reduced-pressure heating and rotary evaporation treatment, and the compound plasticizer is obtained. The compound plasticizer is low in water content, high in purity, low in acidity and good in vacuum stability, and the compound plasticizer has the advantages of high explosive solid content, good processing property, low oil permeability, short preparation time and low energy consumption when applied to the cast explosive.

Description

technical field [0001] The invention belongs to the field of pouring explosives, in particular to a composite plasticizer for pouring explosives, a method for preparing the composite plasticizer for pouring explosives, and the composite plasticizer prepared by the preparation method. Background technique [0002] Cast explosives and propellants have become the most widely used charges due to their excellent mechanical properties and low sensitivity. In order to adjust the mechanical properties of the charge, process performance and increase the solid content, it is necessary to add plasticizers to the cast explosives and propellants. The plasticizers currently used in castable explosives are mostly single esters, such as dioctyl adipate and dioctyl sebacate. Due to the disadvantages of poor wettability and high viscosity of the currently used plasticizers, the solid content of cast explosives using such plasticizers is low, resulting in unsatisfactory energy levels of cast ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00
CPCC06B23/009
Inventor 焦清介欧亚鹏郭学永朱艳丽闫石
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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