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A green slow-burning pyrotechnic agent binder and preparation method thereof

A technology of pyrotechnics and binders, which is applied in the direction of explosives processing equipment, non-explosive/non-thermal agent components, non-explosive fillers/gelling agents/thickeners, etc. and other problems, to achieve the effects of reducing reaction energy consumption and difficulty of separation and purification, good compatibility, and improving combustion performance

Active Publication Date: 2022-04-26
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few research reports on green slow-burning adhesives at home and abroad.

Method used

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  • A green slow-burning pyrotechnic agent binder and preparation method thereof
  • A green slow-burning pyrotechnic agent binder and preparation method thereof
  • A green slow-burning pyrotechnic agent binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mix n-butanol and itaconic acid at a molar ratio of 13:1 to obtain a mixed solution, then add lipase Novozym435 to the mixed solution, the amount of lipase Novozym435 added is 20% of the mass of itaconic acid, and stir at 80°C Carry out atmospheric pressure esterification reaction 12h, obtain the mixture of dibutyl itaconate and monobutyl itaconate, filter and remove lipase Novozym435 after dissolving the mixture in tetrahydrofuran, then add dibutyl itaconate and monobutyl itaconate Water was added to the mixture of butyl esters and allowed to stand for stratification, and the water and monobutyl itaconate in the upper layer were removed to obtain pure dibutyl itaconate. Add initiator benzoyl peroxide (BPO) in the pure product of dibutyl itaconate, the addition of BPO is 1% of the pure product quality of dibutyl itaconate, carry out homopolymerization reaction 40min under 65 ℃ of conditions , to obtain poly(dibutyl itaconate) (PDIB), the pyrotechnics binder.

[0044] T...

Embodiment 2

[0048] Same as Example 1, the only difference is that the homopolymerization time is 80min.

[0049] The same detection as in Example 1 was carried out.

[0050] Results: The number-average molecular weight Mn=10178g / mol, the weight-average molecular weight Mw=19052g / mol, and the dispersion index PDI=1.57 of the poly(dibutyl itaconate) prepared in this example; the conversion rate of dibasic acid reached 98.5%.

[0051] Carry out to the polybutylene itaconate that embodiment 1,2 make 13 C NMR spectrum and 1 HNMR detection, the results are as follows figure 2 Shown; Wherein, (a) is carbon spectrogram, (b) is hydrogen spectrogram. Depend on figure 2 (a) It can be seen that the peaks at 134.10ppm and 127.70ppm gradually disappear with time, representing two olefinic carbons that gradually disappear after polymerization; two (C=O) groups (167.70ppm and 171.80ppm) and ( -OCH 2 The signal of -) units (64.60 ppm) indicated the presence of dibutyl itaconate units in the polyme...

Embodiment 3

[0055] Same as Example 1, the only difference is that itaconic acid is replaced by fumaric acid, and the mol ratio of fumaric acid and n-butanol is 15:1; lipase is porcine pancreatin; Adding water to the mixture with monobutyl fumarate is replaced by adding NaOH to remove monobutyl fumarate; the amount of initiator added is 1%; the temperature of homopolymerization is 50° C. and the time is 100 min.

[0056] The same detection as in Example 1 was carried out.

[0057] Results: The polydibutyl fumarate prepared in this example has a number average molecular weight Mn=5389g / mol, a weight average molecular weight Mw=7899g / mol, and a dispersibility index PDI=1.35. The conversion rate of dibasic acid reaches 98.8%.

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Abstract

The invention discloses a green slow-burning pyrotechnic agent binder and a preparation method thereof, belonging to the fields of biocatalysis and binders. The green slow-burning pyrotechnic agent binder is an ester-based homopolymer; the ester-based homopolymer is obtained through homopolymerization using dibasic acid homopolymer dibutyl ester as a monomer. The invention can synthesize the ester monomer which is difficult to synthesize through the biological enzyme catalysis, and the reaction process is mild, and no acid waste water is generated. Afterwards, the ester-based homopolymer is prepared by low-temperature self-homopolymerization, the process is environmentally friendly, the reaction progress is accelerated, the output is increased, and the product has good thermal stability. The pyrotechnic composition binder prepared by the invention has good compatibility with the pyrotechnic composition, can improve the combustion performance of the pyrotechnic composition, reduce the burning speed of the pyrotechnic composition, and simultaneously reduce solid particles and toxic and harmful gases produced by combustion.

Description

technical field [0001] The invention relates to the fields of biocatalysis and binders, in particular to a green slow-burning pyrotechnics binder and a preparation method thereof. Background technique [0002] Pyrotechnics produce special effects through chemical reactions such as combustion or explosion, also known as pyrotechnics or pyrotechnics, and are widely used in civil and military fields such as fireworks viewing, signal flares, smoke bombs, incendiary bombs, bait bombs, and rapid inflation rescue. Pyrotechnics mainly include oxidizers, combustibles, binders and other additives. Adhesive is a substance that can bind the components of pyrotechnic powder together, and has the functions of maintaining the uniformity and mechanical strength of the drug, reducing the mechanical sensitivity of the drug, and improving the chemical stability and safety. Common binders for pyrotechnics mainly include resin, polyether, nitrocellulose, polyvinyl alcohol, shellac, etc. Studie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00C06B21/00
CPCC06B23/001C06B21/0008
Inventor 于跃韩志跃邓利王芳佟文超朱维熠李志禧连旭刘一桂雨音段雨萱
Owner BEIJING UNIV OF CHEM TECH
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