DE977926C - Process for the production of composite propellants using liquid oxygen carriers that are stable at normal temperature - Google Patents

Description

mass of fuel, required. In the production of propellants with additional inorganic Oxygen carriers will proceed as described, except that the carrier substance-liquid-oxygen carrier mixture the inorganic oxygen carriers before the addition of the chloroprene polymer are mixed in.

When using other liquid oxygen carriers than tetranitromethane, such as. B. methyl nitrate or methyl nitrate-ethyl nitrate, the process is not modified.

Three recipe examples are given below:

1. 78.3% tetranitromethane
14% polyacetylene

6.2 ^fl / o chloroprene polymer

(without solvent)
0.3% butyl acetate (solvent content)
1.2% methyl nitrate (swelling agent)

2. 46.5% methyl nitrate
32.5% ammonium nitrate
12.2% activated carbon

6.8 ^fl / o chloroprene polymer

(without solvent) 0.4% butyl acetate (solvent content) 1.6% ethyl nitrate (swelling agent) 5

3. 52.4% methyl nitrate
21.2% ethyl nitrate
7.9 per cent. Ammonium perchlorate
7% polyacetylene
4% activated carbon

5.7% chloroprene polymer

(without solvent) 0.3% butyl acetate (solvent content) 0.8% methyl nitrate (swelling agent) 0.70 / 0 ethyl nitrate (swelling agent)

When using solid chloroprene polymers are these first with commercially available solvents, which may be methyl nitrate or ethyl nitrate can be added to bring into solution and the low-boiling solvent components, as described above, to be removed by spray drying or evaporation.

Claims (1)

1 2 ρ,, In further development of the method was * "now found that you can get the required share Process for the production of composites can greatly reduce binding agents without influencing the propellant charges using liquid oxygen, which is less than normal temperature stable with mechanical properties of the sets, if chloroprene polymers are used as carriers, with liquid oxygen carriers of the binder type being used come. The use of nitroparaffins and / or paraffin nitrates prior to such polymers, as well as other inconvenient incorporation of chuk-like substances into a synthetic resin binder as binders, is known in and of itself as organic substances with a high level of active knowledge (see British patent specification 864 749 and surface are absorbed, according to Patent 977 925 ¹⁰ German Auslegeschrift 1 109 578). The in the pending (patent application Sch 28937 VIb / 78 α.), And drawn patents for the use of polychloroprene as a binding winnung solid propellants with the use of chlorine, characterized in that the absorbate roprene polymers can be used in the invention liquid oxygen carrier / absorption agent provided according to the intended, colored adsorbents, if necessary after mixing with other liquid organic oxygen, non-organic oxidizing agents, with one. It has been found that in the presence of chloroprene polymer which contains 2 to 9% of a unit of low-boiling solvents such as hexane, high-boiling solvents such as butyl acetate, benzene, acetone and the like, a partial displacement and that with methyl and / or ethyl des organic oxygen carrier is swollen from the Absornitrat, blended and formge- ²⁰ bens takes place, further, that the gezogepreßt is considered. ■ a solvent with the predominantly acidic Substance carriers used TNM detonable Form mixtures. On the other hand, the chloroprene polymers are in solvent-free form of 25 the intended as swelling agent with TNM In the main patent 977 925 (patent application for acceptable substances such as methyl nitrate and ethyl-Sch 28937 VIb / 78d) a process for nitrate is not swollen in the form required for the further processing of composite propellants. Such a swelling of liquid, but stable at normal temperature, is possible if the polymer still contains 2-diger oxygen carriers with and without compensation of 30 to 9 ^fl / o of a high-boiling solvent compor oxygen balance due to additional inorganic components. It has been shown that oxygen carriers in particular have been described, the main characteristics of which, butyl acetate, form the adsorption of oxygen carriers which are liquid at normal temperatures with TNM and which cannot be detonated at normal quantities. In the following, the idea of the invention is explained in more detail using an example of niche substances with a large active surface with 35, subsequent incorporation of the adsorbate adsorber. bens mixture in binder. As a binder example are in the main patent Polysiloxane, Poly- As in the main patent 977 925 (patent application urethanes, polycarbonates, epoxy resins and gelati- Sch 28937 VIb / 78d) described, is pulverinbaren organic nitro bodies listed. 4 ° sized and sieved activated carbon or polyacetylene What these binders have in common is tetranitromethane with cooling and stirring the technology of meddling the with which is added to saturation. Oxygen carrier saturated adsorbent. In man- Commercially available chloroprene polymer solution Chen cases are syrupy to doughy conditions. B. spraying or evaporation plastics, which after the addition of a catalyst 45 fen of the low-boiling solvent components or crosslinking agent or hardener in the solid components such. B. acetone, exempt. That at ZerForm polymerize or vulcanize. Dust drying of solid powder The binder content of the solid film obtained after the shielded or the evaporation The propellant charges produced by the th process are between 2 and 9% of the high-boiling solutions about 15 to 25%. With the exception of nitrating 5 ° middle component, such as. B. butyl acetate, contain, th binders pollute the binders the oxygen powder or film are with methyl nitrate or unfavorable balance sheet, d. i.e., the swollen to burn the ethyl nitrate and with the mixture out The oxygen required for the binder must be a carrier substance in the propellant and an oxygen carrier in the kneader be included. If the propellant is mixed with the or mixer. The worked through Binder other fuel components, such as. B. 55 mass of crumbly consistency is added to the organic carrier substances, so it is given accordingly in the case of the desired sentence geometry Binder proportions not filled or only th form and pressed. Immediately after It is difficult to achieve an approximately balanced compression, which at normal temperature is due to the oxygen balance to obtain. Since the receptacle is guided, the compacts become incapable of being removed from the mold of the carriers for the liquid 60 took. The binding effect of the chloroprene oxygen carrier is limited, a compensation polymer agglomerates when pressed is on in the oxygen balance only by adding to the existence of active surface centers of organic back solid oxygen carrier. The led. This principle of bonding by Anim Formulation examples cited in the main patent, press pressure is generalized as a »contact adhesive process« clearly how big the known to offset the 65 mine. Oxygen balance required inorganic additives To achieve propellants of good mechanical A chloroprene polymer is capable of achieving high-performance strength and to obtain non-sooty propellants. Share of only 4 to 7%, based on the total