RU2561083C1 - Powder phlegmatising agent - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to production of powder for small arms. The powder phlegmatising agent contains, wt %: Dinitrotoluene - 20-40 and α, ω-dimethacryl-(bis-triethylene glycol)phthalate(MGF-9) - the balance. Another version of the powder phlegmatising agent contains, wt %: Centralite 1 - 20-40, MGF-9 - the balance.

EFFECT: phlegmatising agent ensures stability of the phlegmatised layer of powders with high content of nitroglycerine (more than 20 wt %).

2 tbl, 6 ex

Description

The invention relates to the field of obtaining gunpowder for small arms.

To increase the progressivity of combustion, gunpowder is treated from the surface with phlegmatizers. According to the patents [1-5], when producing progressively burning spherical powders (TFP), dinitrotoluene (DNT), centralit 1, dibutyl phthalate (DBP) or their mixtures are used as phlegmatizers, provided that their crystallization temperature is 20-30 ° C below the boiling point water, since phlegmatization of TFP is carried out in an aqueous medium at elevated temperatures by emulsions of components. Each phlegmatizer has its own advantages and disadvantages and none of them is universal. So, centralitis 1 in an individual form is used only for phlegmatization of dibasic TFP (containing nitroglycerin) due to the low plasticizing ability with respect to cellulose nitrates (SC). For monobasic TFP, it is used only in a mixture with DNT or DBP, which perform the function of SC plasticizers.

The closest adopted for the prototype of the invention (according to option I) is a phlegmatizer of gunpowder, including camphor, centralit 1 and dinitrotoluene in the following ratio of components, wt. % [6]:

camphor 25-35 central 1 25-40 dinitrotoluene rest

As the closest analogue of the invention according to option II is a phlegmatizer of gunpowder, consisting of centralite I and 6-ethoxy-2,2,4-trimethyl-1,2,3,4-tetrahydroquinoline in an amount of 3.0 wt. % [2].

The disadvantages of the prototypes is the lack of stability of the phlegmatized zone in dibasic TFP with a high content of nitroglycerin (more than 20 wt.%).

The objective of the invention is to develop a phlegmatizer that ensures the stability of the phlegmatized layer of gunpowder with a high content of nitroglycerin (NGC) (more than 20 wt.%).

The problem is solved due to the fact that:

1 option. Phlegmatizer for dibasic gunpowder, including DNT, additionally contains α, ω-dimethacryl- (bis-triethylene glycol) phthalate (MGF-9) in the following ratio, wt.%:

DNT 20-40 MGF-9 rest

Option 2. Phlegmatizer for dibasic gunpowder, including centralite 1, additionally contains α, ω-dimethacryl- (bis-triethylene glycol) phthalate (MGF-9) in the following ratio, wt.%:

central 1 20-40 MGF-9 rest

The use of a binary phlegmatizer makes it possible to use it for phlegmatization of spherical powders with a high content of NGC, including coarse ones (granule diameter 1.2-3.0 mm), which require a large depth of the phlegmatized zone, for example, up to 120 microns instead of 30-60 microns. When using only the oligomeric compound MGF-9, due to its tendency to polymerize at temperatures of 60-90 ° C, the diffusion process noticeably slows down. An increase in the time of phlegmatization in this case is ineffective. Therefore, the required depth of the phlegmatized layer is ensured by the diffusion of the second component of the mixture — DNT or centralite 1, which are low molecular weight compounds.

The preparation of the phlegmatizing emulsion was carried out as follows. In the reactor emulsifier in an aqueous medium containing an emulsifier in an amount of 0.2-0.5 wt. % with respect to water, at a temperature of 70-90 ° C (depending on the content of nitroglycerin in the powder, which is supposed to be phlegmatized), a phlegmatizer emulsion is prepared, which includes DNT and MGF-9 in predetermined proportions, and with stirring a phlegmatizing emulsion of concentration 3.5 is prepared % At the same time, 1 wt.% Was heated in the phlegmatizer reactor. including powder in 3.5 wt. tsp to a temperature of 70-90 ° C. Upon reaching the required temperature in the reactor-phlegmatizer, the phlegmatizing emulsion was dosed into a suspension of gunpowder and treatment was carried out for a certain time and temperature.

It should be noted right away that the temperature of the phlegmatization of gunpowder below 80 ° C is acceptable only for the first version of the composition due to the higher melting temperature of centralite 1, equal to 76-78 ° C.

The composition of the phlegmatizing emulsion and the characteristics of the phlegmatized zone are shown in tables 1 (I option) and 2 (II option).

In examples 4-5, the phlegmatization of gunpowder was carried out according to parameters outside the boundary conditions. With an equal ratio of the components of the phlegmatizer in the powder (example 4) and with an increase in the content of MGF-9 to 90% (example 5), a sufficient depth of the phlegmatized layer in the granules of the TFP is not provided.

Information sources

1. RF patent No. 1808191, MKI C06B 25/22 (1991.03).

2. RF patent No. 2284981, MKI C06B 21/00 (2006.10).

3. RF patent No. 1814805, IPC С06В 21/00.

4. RF patent No. 2448073, IPC С06В 21/00, 25/00.

5. RF patent №2367639, IPC С06В 21/00 (2006.01).

6. RF patent No. 2425017, IPC С06В 21/00, 25/00.

Claims (2)

1. Phlegmatizer for dibasic gunpowder, including DNT, characterized in that it additionally contains α, ω-dimethacryl- (bis-triethylene glycol) phthalate (MGF-9) in the following ratio, wt.%:
DNT 20-40 MGF-9 rest 2. Phlegmatizer for dibasic gunpowder, comprising centralit 1, characterized in that it further comprises α, ω-dimethacryl- (bis-triethylene glycol) phthalate (MGF-9) in the following ratio of components, wt.%:
central 1 20-40 MGF-9 rest