DE157424C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The previous phosphorus-free matches suffer from the evils that they either Burn off explosively or that they either act as a substitute for the phosphorus toxic additions, such as copper sulfocyanide (patent specification 119010, class 78), lead hyposulfite (Patent specification 126807, class 78 and Swiss patent specification 19228) require, or to dipping required little

ίο are durable (Swiss patent specification 20539 and Patent 105061, "Kl. 78).

According to the patent specification 105061, Class 78, the method described possessed matches produced, apart from "the minor Durability of your dip, too little firm heads, which rubbed off on rough surfaces were without igniting, so that they were technically unusable; They also required expensive gelatine as a binding agent.

All of the above inconveniences are avoided in the method according to the present invention been.

The procedure is as follows:

First, by partial oxidation of hyposulfuric acid salts with copper oxide salts, Iron chloride, iodine, etc. and precipitations with barium salts or other salts suitable for precipitation that are already described in the patent 105061, class 78, described salts (for example cuprobarium polythionate) prepared; These are then after intimate mixing with sulfur using pressure, dry or moist heat converted into the sulfur compounds, which briefly z. B. as sulfocuprobarium polythionate should be designated. These salts are produced, for. B. such, that the sulfur is intimately mixed with the cuprobarium polythionate, warmed dry or ground on a mill. The same thing is achieved if the two ingredients are rubbed under pressure or intimately mingled with compressive pressure or other suitable measures, in which the finest Parts of both components under pressure respectively. the heat generated by the pressure on each other can act. Complete implementation is also achieved by warming the intimately mixed parts brought about in water. The proportions of the two components the effects are within wide limits. So were both when acting of 3 parts of sulfur to 10 parts of cuprobarium polythionate as well as on exposure Almost equal amounts of usable ignition masses were achieved.

With the specified treatment, the yellow color of the mixture turns into a reddish one over, and the volume of the moist mixture swells significantly when heated, Evidence that you can do it not with a mere mechanical mixture, but with a new chemical compound of sulfur has to do with cuprobarium polythionate or corresponding salts. A further evidence of this is also that when using the sulfocuprobarium polythionate for the production of the dip no precipitation of the glue when heated and thus a: the dip becomes unusable

follows. This is always the case if the cuprobarium polythionate is used according to the previous method first mixes in the glue and only then adds the sulfur (see »Austro-Hungarian ignition goods manufacturer«, ii. Year, 1902, pp. 139 and 140). When the sulfur is mixed with cuprobarium polythionate without pressure, the sulfo compound is not formed; but it arises in only a small part of the finished dip when heated, so the glue gets through the chemical conversion precipitated and thus made the dip unusable.

These sulfo compounds, e.g. B. the Cuprobariumpolythionats are used for production the dip used in the usual way.

When using these sulfo compounds, the sauce can be kept for days and is insensitive against warming, it gives very firm heads, easily flammable on the stuff and on the roughest friction surfaces, needs a binding agent not the expensive gelatine and also no poisonous lead compounds for production a good dip; in addition, a slow, calm burning off of the head is achieved.

In the following, the composition of a usable ignition compound is given as an example, it is emphasized that while retaining the sulfo compounds, e.g. B. des Sulfocuprobarium polythionate as the main ingredient, many variations possible are:

20 percent sulfocuprobarium polythionate,

27.2 percent pumice stone, quartz flour, etc., 44.8 percent potassium chlorate,

8.0 percent glue.

Instead of the polythionates already described in patent specification 105061 can also the salts of acids which are formed by oxidation of these polythionates or of thiosulfuric acid and their salts arise, treatment with sulfur under pressure or the action of dry or moist Subjected to heat and the reaction products thus obtained are mixed with an oxygen-releasing substance.

Claims (1)

Patent claim: Process for the preparation of a phosphorus-free ignition material for matches, characterized in that substances which easily give off oxygen are the ones obtained by pressure, dry or moist heat Reaction products of sulfur with one or more salts of polythionic acids (di-, tri-, tetra-, Pentathionic acid) or with salts of the acids, which by oxidation from the acids mentioned or thiosulfuric acid or from their salts are added.