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A kind of composite plasticizer and preparation method for htpb-based explosives and propellants

A composite plasticizer and propellant technology, which is applied to non-explosive/non-thermal agent components, explosives, offensive equipment, etc., can solve the problems of dissent, large energy consumption and time consumption, and achieve short time consumption and solid content of explosives High, high-purity effect

Active Publication Date: 2019-07-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method not only consumes a lot of energy and time, but also has objections on whether the small molecular impurities and water in the treated materials can be completely removed.

Method used

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  • A kind of composite plasticizer and preparation method for htpb-based explosives and propellants
  • A kind of composite plasticizer and preparation method for htpb-based explosives and propellants

Examples

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preparation example Construction

[0019] According to a second aspect of the present invention, the present invention provides a method for preparing a composite plasticizer for HTPB-based explosives and propellants, the method comprising: dioctyl adipate and liquid paraffin are heated and rotated under reduced pressure Steam processing, obtain described composite plasticizer;

[0020] Wherein, based on the total weight of the composite plasticizer, the content of the dioctyl adipate is 1-99% by weight, and the content of the liquid paraffin is 1-99% by weight.

[0021] Preferably, based on the total weight of the composite plasticizer, the content of the dioctyl adipate is 20-80% by weight, and the content of the liquid paraffin is 20-80% by weight.

[0022] In addition, the specific elaboration and preferred conditions of the liquid paraffin are the same as those described above, and will not be repeated here.

[0023] In the present invention, the decompressed heating and rotary evaporation treatment can b...

Embodiment approach

[0024] According to a preferred embodiment, the preparation method of the present invention specifically includes the following steps:

[0025] 1) vacuuming: sealing dioctyl adipate and liquid paraffin in a rotary steamer, and vacuuming;

[0026] 2) Rotary evaporation treatment: the dioctyl adipate and liquid paraffin are subjected to rotary evaporation at 50-100°C.

[0027] 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.

[0028] In step 2), the temperature of the rotary steaming treatment is preferably 75-95°C.

[0029] In step 2), the rotational speed of the rotary steaming treatment may be 10-100 rpm, preferably 30-70 rpm.

[0030] In step 2), the time for the rotary steaming treatment may be 1-4 hours, preferably 2-3 hours.

[0031] According to the third aspect of the present invention, the present invention provides a composite plasticizer pr...

Embodiment 1

[0043] This example is used to illustrate the composite plasticizer and preparation method for HTPB-based explosives and propellants of the present invention.

[0044] The composite plasticizer contains dioctyl adipate and liquid paraffin; based on the total weight of the composite plasticizer, the content of dioctyl adipate is 33% by weight, and the content of liquid paraffin is 67% by weight .

[0045] The above-mentioned composite plasticizer is prepared through the following specific operations:

[0046] Step 1: Seal dioctyl adipate and liquid paraffin in a rotary evaporator, and use a vacuum pump to depressurize the rotary evaporator to -0.1MPa;

[0047] Step 2: Heating the temperature to 90° C., adjusting the rotary steaming speed to 50 rpm, and rotary steaming for 2 hours, so as to obtain the composite plasticizer A.

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Abstract

The invention provides a composite plasticizer used for HTPB-based explosives and propellants, and a preparation method thereof. The composite plasticizer contains, by weight, 1-99% and preferably 20-80% of dioctyl adipate and 1-99% and preferably 20-80% of liquid paraffin. The preparation method is characterized in that the composite plasticizer is obtained through reduced-pressure heating rotaryevaporation treatment of the dioctyl adipate and the liquid paraffin. The composite plasticizer has the advantages of good intersolubility with HTPB, low water content, high purity, high combustion heat and good vacuum stability, and the explosives have the advantages of high solid content, adjustable mechanical performances, good usability, short preparation time and low energy consumption whenthe composite plasticizer is applied to the HTPB-based explosives and the propellants.

Description

technical field [0001] The invention belongs to the field of HTPB-based pouring explosives, in particular to a composite plasticizer for HTPB-based explosives and propellants, a preparation method for a composite plasticizer for HTPB-based explosives and propellants, and the preparation method Composite plasticizer prepared by the method. Background technique [0002] Hydroxy-terminated polybutadiene (HTPB)-based cast explosives and propellants have become the most widely used charges due to their excellent mechanical properties and low sensitivity. For the purpose of adjusting the mechanical properties, technological properties and solid content of the charge, it is necessary to add plasticizers to the HTPB-based cast explosives and propellants. Most of the plasticizers currently used in HTPB-based charges are single esters, such as dioctyl adipate, etc. Due to the low calorific value of esters, the use of a single ester plasticizer has the disadvantage of low energy; mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/00C06B23/00C06B45/00
CPCC06B23/00C06B45/00C06D5/00
Inventor 焦清介欧亚鹏朱艳丽闫石郭学永
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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