Composition for producing mock-up charges

FIELD: chemistry.

SUBSTANCE: invention relates to rocket engineering and specifically to making imitators of mixed solid propellant used when breaking-in equipment for hazardous facilities for mass production of small-size set-in charges of mixed solid propellant and refinement of mechanical processing of said articles and training maintenance personnel. The imitator contains filler in form of a mixture of potassium chloride and dispersed spherical aluminium, binder in form of divinyl nitrile rubber with terminal carboxyl groups and epoxy resin, transformer oil, curing agent in form of tetramethylthiuram disulphide (thiuram D) and zinc oxide, and a surfactant in form of lecithin or cationat-7.

EFFECT: invention provides reliable imitation of standard composition of mixed solid propellant on viscosity, working life, physical and mechanical properties and adhesion to armour.

2 cl, 3 tbl

 

The invention relates to rocket technology, namely the development of models of composite solid rocket fuel (STRT), designed to model weapons used during the running-in process equipment hazardous industries manufacturing small supplementary charge START mass production, improvement of machining processes of these products and technical personnel training, re-entered the work.

The predominant use in the compositions for obtaining the mock-up charges by method of booking in the process of forming charges in semi-automatic mode when the running-in process equipment hazardous industries. Any other use, for example in compositions for testing regimes machining charges and preparation of cutting tools.

Known inert compounds to obtain the mock-up charges where the fillers are oxides and salts of calcium, materials, rocks, carbonates, metals, aluminum, and as a polymer base polyolefins, waxes, polyvinyl chloride, synthetic rubbers (U.S. patent No. 3936403, CL SC 3/22; No. 4119606, CL SC 5/54; and. C. the USSR №1779684, CL SW 23/00, 1992, and others).

These formulations reproduce the properties of the fuel mass in relation to the charges, firmly bonded to the body is m rocket engine, significantly different from the charges, Deposit type, and may not be used in the manufacture of charge method of booking in the process of filling due to inadequate characteristics of toughness, vitality, physical-mechanical properties and adhesion.

In addition, they are intended for the manufacture of large-sized products, the production of which is not used technological equipment necessary for the production of small charges, such as the machine fills.

Known composition to obtain a mock charges adopted for the prototype, which contains a filler, binder, which includes synthetic rubber and epoxy resin, transformer oil, hardener and surfactant (EN 2091358, IPC6CL SW 23/00, published 27.09.1997).

The main disadvantages of the prototype the following:

not simulates the staff STRT toughness, vitality and physical-mechanical characteristics.

The present invention is the task of creating a composition to obtain a small-sized mock-up charges of mass production, booked in the process of filling with the appropriate START adhesion, physical-mechanical and technological characteristics, while technological properties of inert fuel mass should allow safely make eligability charges in an industrial environment.

The technical result from the use of this invention is the accuracy of the simulation of staff STRT toughness, vitality, physical-mechanical properties and adhesion to the code.

The technical result is achieved in that the composition for obtaining the mock-up charges, including the filler, binder, which contains synthetic rubber and epoxy resin, plasticizer, curing agent, and a surfactant, according to the invention as filler contains: mixture of potassium chloride with aluminum as the base binder - defininitely rubber with terminal carboxyl groups, as hardener - tetramethylthiuramdisulphide and zinc oxide, and as the surfactant is lecithin, the following ratio of components, wt.%:

Aluminum spherical dispersed5,00-17,00
Defininitely rubber with terminal carboxyl15,64-16,70
groups
Epoxy3,80-the ceiling of 5.60
Transformer oil2,20-2,80
Tetramethylthiuramdisulphide0,10-0,20
Zinc oxide0,10-0,40
Lecithin or Catinat-70,19-0,21
Potassium chloriderest

The basis of the model composition is potassium chloride is a material having a wide resource base, the content of which is 51-73%. The use of dispersed powder aluminum in the number of 5-17% prevents structuring the layout of the mixture over time and allows you to save the semi-finished product within 12 hours without changing viscosity. In addition, the use of dispersed powder aluminum can significantly reduce the initial viscosity of the mixture model and improve its flowability.

Use as a binder divinylacetylene rubber with terminal carboxyl groups contributes to the accuracy of the simulation of the technological properties of the composition, its physical and chemical stability, and also provides the required level of adhesion of the composition to the code.

Used as a hardener rubber with terminal carboxyl groups of zinc oxide increases the accuracy of the simulation of the viability of the structure that is necessary to accelerate the process, persons of the NGOs in the manufacture of small charges, the set of physico-mechanical properties of the cured composition.

In tables 1 and 2 shows examples of formulations of the mock-up charges, from which it follows that the lecithin and Catinat-7 are technical equivalents.

In an advantageous embodiment, the composition for obtaining a mock charge contains two fractions of potassium chloride: granulated in the form of pressed pellets of irregular shape or large crystals and small in the form of small crystals, the ratio of these fractions in the range from 73/27 to 70/30, inclusive.

Table 3 summarizes the characteristics of the composition to obtain a mock charges at various ratios of large and small fractions of potassium chloride.

Table 1
Examples of formulations of the mock-up charges
Name of the components and characteristicsThe content of the components in the formulations of inert composition, wt.%
12345678Protot the p
Aluminum spherical dispersedof 17.016,015,014,0to 12.010,05,05,01,0-15,0
Epoxy20,320,320,320,320,320,320,320,30,2-1,0
Defininitely rubber with terminal carboxyl groups-
Polybutadiene or polyisopropene oil-filled rubber--------10,0-20,0
Catinat-7 (diamentional)0,190,20 0,200,210,200,200,200,210,15-0,40
Transformer oil2,402,402,402,402,402,802,102,20of 0.9 to 10.7
Henology ether--------0,2-0,5
Chalk natural--------63,0-79,5
Potassium chloride60,061,062,063,065,0 67,072,072,0-
Zinc oxide0,150,150,150,150,150,200,300,40-
Tetramethylthiuramdisulphide (thiuram D)0,150,150,150,150,150,200,100,10-
The viscosity of the mass at a process temperature of 60°C, poise61006400680070007200750079008200-
Time suitability for mass processing at 60°C (viability), h121212 121288712

Table 2
Examples of formulations of the mock-up charges
Name of the components and characteristicsThe content of the components in the formulations of inert composition, wt.%
12345678The placeholder
Aluminum spherical dispersedof 17.016,015,014,0to 12.010,05,05,01,0-15,0
Epoxy20,320,320,320,3 20,320,320,320,30,2-1,0
Defininitely rubber with terminal carboxyl groups-
Polybutadiene or polyisopropene oil-filled rubber--------10,0-20,0
Lecithin0,190,200,200,210,200,200,200,21-
Catinat-7 (diamentional)--------0,15-0,40
Transformer oil 2,402,402,402,402,402,802,102,20of 0.9 to 10.7
Henology ether--------0,2-0,5
Chalk natural--------63,0-79,5
Potassium chloride60,061,062,063,065,067,072,072,0-
Zinc oxide0,150,150,15 0,150,150,200,300,40-
Tetramethylthiuramdisulphide (thiuram D)0,150,150,150,150,150,200,100,10-
The viscosity of the mass at a process temperature of 60°C, poise61006400680070007200750079008200-
Time suitability for mass processing at 60°C (viability), h121212121288712

Table 3
Characteristics of the composition to obtain a mock charges at various ratios of large and small fractions of potassium chloride
Name of indicatorExamples of fractional composition of potassium chloride
12345
The contents of a large fraction of potassium chloride, %6567707375
The content of the fine fraction of potassium chloride, %3533302725
Adhesive strength, MPa1,120,920,840,810,73
The viscosity of the mixture when the processing temperature of 60°C, poise80007500690067006100
Note:
1. In accordance with the technical documentation on compact charge START, the value of the adhesion strength shall be not less than 0.8 MPa.
2. In accordance with the technical documentation on compact charge START, the value of viscosity at the processing temperature of 60°C must be within 6700-6900 poise.

1. The composition to obtain a model of the charges containing the filler, binder, which includes synthetic rubber and epoxy resin, transformer oil, curing agent and a surfactant, wherein the filler contains a mixture of potassium chloride with aluminum spherical dispersion, as a basis spanning - defininitely rubber with terminal carboxyl groups, as hardener - tetramethylthiuramdisulphide and zinc oxide, and as the surfactant is lecithin or Catinat-7 in the following ratio, wt.%:

aluminum spherical dispersed5,00-17,00
defininitely rubber with integral
carboxyl groups15,64-16,70
epoxy3,80-the ceiling of 5.60
transformer oil2,20-2,80
tetramethylthiuramdisulphide (thiuram D)0,10-0,20
zinc oxide0,10-0,40
lecithin or Catinat-70,19-0,21
potassium chloriderest

2. The composition according to claim 1, characterized in that the potassium chloride consists of two fractions: granulated in the form of pressed pellets of irregular shape or large crystals and small - in the form of small crystals at the ratio of these fractions in the range from 73/27 to 70/30 inclusive.



 

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