DE1696381C - Process for the production of powder masses - Google Patents

Description

1 S96381

The invention relates to a method of manufacture of powder masses based on nitrocellulose, liquid nitric acid esters mJuvvertiger alcohols and optionally inorganic or organic oxygen-containing salts by kneading the components according to the LoMingsmitteltechnik, in which a part of the nitrocellulose and the Gelatinized, pre-ripened precursor containing nitric acid ester together with a mixture from the remaining nitrocellulose, solvents, additives, gelatinizers and, if necessary, inorganic ones or organic salts containing oxygen is subjected to a kneading process.

In a known method of this type, the procedure is that in a first mixing stage the > 5 alcohol-dampened nitrocellulose, if necessary after intimate mixing with other solid explosive components and / or usual surcharges, for the purpose of achieving a thoroughly gelatinized, preUable mass · ",: an organic solvent is added »<» and that this premix in a / wide mixing stage the Sprengol in the form of a means of collodion wool produced blasting gelatin is added. This makes a propellant powder with relatively only get low ballistic properties.

The invention is based on the object of the known Avoid disadvantage and also achieve further advantages. It concerns a procedure for the production of powder masses based on 3 » Nitrocellulose, liquid nitric acid esters, polyhydric alcohols and possibly inorganic ones or organic salts containing oxygen by kneading the components according to the solvent technology, in which a part of the nitrocellulose unJ Gelatinized and pre-ripened precursor containing the nitric acid ester together with a mixture from the remaining nitrocellulose, solvents, additives, gelatinizing agents and optionally inorganic or organic oxygen-containing salts are subjected to a kneading process.

The method is characterized in that a nitrocellulose containing about 25% alcohol with about 13.15 · / · nitrogen content, the amount of which is at least 15 · / · (based on dry nitrocellulose) «3 of the total required solvent-containing Nitrocellulose amount », gelated with the nitric acid conductor to the preliminary product and this with the mixture from the remaining nitrocellulose with the same nitrogen content, solvents, additives, etc. is kneaded.

The production of a pre-concentrate from at least 15 · / · the nitrocellulose, all of the Sprengol and part of the solvent, which after a short time leads to a homogeneous, translucent, gelatinized product, has the consequence that after a short waiting time a very well prepared Product is obtained, the further processing of which leads to a very well homogenized powder after a relatively short kneading time, on the other hand the dangers that arise during the transport and addition of the brave nitroglycerin to the kneading material are considerably reduced, since the explosive oil within a short time is converted into a relatively less sensitive form. Due to its solvent content, the ⁶ S pre-concentrate mentioned has the advantage of being even less sensitive than when using a known blasting gelatin. In addition, the ballistic properties are significantly improved

In and of itself it was not to be expected that a nitrocellulose with a nitrogen content of about 13 15 · / »is to be gelatinized. since in the opinion of t'cr Experts (see F Miles. »Nitrocellulose *, S 1) gelatinizing wool with more than 12.8% N is not possible. Only by the fact that the invention an alcohol-dampened nitrocellulose is used, a nitrocellulose with a nitrogen content of about 13.15Vo can be gelatinized.

The selection of the according to the present invention The components used are made according to the usual powder formulas, whereby as liquid Nitric acid esters, for example nitroglycerin, nitroglycol, Diglycol dinitrate; as a solvent in particular Acetone, acetone-alcohol or ether-alcohol mixtures; as gelling agents, compounds such as Centralii, Akardit, Dibutylphthalat, Dioctylphthalat or the like; as additives, for example, lead salts, cryolite, titanium dioxide and others. and as oxygen content Salts, for example nitroguanidine, perchlorate, ammonium nitrate and the like, come into consideration.

example

In 100 parts of nitroglycerin there are 20 parts of a 25% alcohol-moist nitrocellulose with a nitrogen content of 13.15 · / · entered with stirring and allowed to mature for about 6 hours. It creates a almost translucent cuttable gelatin, which together with UO Teüen further nitrocellulose (13.15 · / · N) and 120 parts of nitroguanidine with the addition of 40 parts of acetone and 30 parts of alcohol is subjected to a kneading process which takes about 4 hours after completion a powder was obtained that was chemically good; Stability and ballistic properties showed.

Is the powder production by simultaneous kneading of the entire powder according to conventional methods Nitrocellulose, nitroglycerin and the other components made, so is up to A kneading time of about 6 to 8 hours is required to achieve a similarly good homogenization, with there is also a significantly increased risk of danger.

Claims (1)

Claim: Process for the production of powder masses on the basis of nitrocellulose, liquid saline acid esters polyhydric alcohols and optionally inorganic or organic oxygen-containing salts by kneading the components according to the solvent technique d ^ m a part of the nitrocellulose and the Gelatinized and pre-ripened precursor containing nitric acid ester together with a Mixture of the remaining nitrocellulose, solvents, additives, gelatinizing agents and optionally inorganic or organic oxygen-containing salts in a Kr-M process un! er * cifen is characterized by that a nitrocellulose containing about 257 alcohol with about 13.15 / nitrogen content, their amount at least 15 * / · (based on dry nitrocellulose) of the total required solvent-containing nitrocellulose is, with the nitric acid ester gelatinized to the intermediate and this with the mixture of the remaining Nitrocellulose of the same nitrogen content, Solvents, additives, etc. is kneaded.