DE462651C - Process for the manufacture of resinous products - Google Patents

Description

Process for the manufacture of resinous products It is known acetaldehyde, which can be produced in various ways by using condensation agents in condensation or. Polymerization products to be transferred. So far you have been here as far as acetaldehyde was not condensed with phenols, forced from isolated Run out of acetaldehyde. It has now been found that this can be achieved by the action of Acetylene reaction mixture formed on catalysts in the presence of water without isolation of the aldehyde to generate condensation or. Polymerization products can be used by either continued or increased exposure the catalyst liquid used for acetaldehyde formation alone or through With the aid of other condensation agents, the condensation of the aldehyde is brought about.

The formation of the condensation products from the aldehyde can be achieved by adding the most diverse organic compounds favored «-erden, z. B. by addition of carboxylic acids, alcohols, glycols and the like in addition to the condensation of the aldehyde, also its formation, and it is therefore in the generally advantageous, the entire reaction from the absorption of the acetylene on to be carried out in the presence of these additives. Example i.

One part of mercury oxide is dissolved in 100 parts of 5% sulfuric acid and, with thorough stirring, introduces acetylene into the solution at 80 °, which is vigorous is absorbed. As the reaction progresses, oily masses separate first which gradually become tougher in the further course of the process and with sufficient Acid change into solid resins.

The addition of further amounts of sulfuric acid or the addition of other condensing agents, z. B. phosphoric acid, phosphates, at the beginning or in the course of the condensation reaction can be useful as well as the use of positive pressure.

Example e.

It is suspended in 100 parts of amyl alcohol, parts of mercury sulfate and introduces acetylene into the suspension with stirring at 100 °. At the same time lets the amount of water corresponding to the acetylene absorbed in each case is run in. As soon If a viscous oil has formed, 50 parts of 4% sodium hydroxide solution are allowed to flow in and refluxed for several hours with stirring. After all, you drift the amyl alcohol with Water vapor. It leaves behind an ordinary Temperature solid resin.

Instead of caustic soda, other condensing agents can be more alkaline or acidic in nature, e.g. B. basic hydroxides, ammonia, organic Bases, sulfuric acid, phosphoric acid, hydrochloric acid and the like.

Example 3.

One works according to example i, but adds as soon as viscous Form condensation products, add ioo parts of alcohol. In the alcoholic, watery one In the reaction medium, the condensation runs significantly faster than in a purely aqueous medium Liquid.

The addition of alcohol or another organic auxiliary body can be carried out before or at the beginning or only in the course of the condensation.

Example q ..

5 parts of mercury phosphate are suspended in 100 parts of 7 percent strength acetic acid and introduces acetylene into the emulsion at 80 °. There is a strong absorption instead, the solution gradually thickened and initially soft resin masses are formed. By prolonged heating of the reaction mixture to 80 to 100 ° solid resins are obtained.

Leave the condensation products obtainable by this process use themselves for the same purposes as aldehyde resins produced in other ways. But they can also be further improved, e.g. B. by having them for the refinement of aldehyde condensation products possible post-treatment methods subject. You can, for example, an intensive treatment with water, subject to a thermal treatment or a hardening process, their Elasticity properties through the incorporation of hydroxyl or cartonyl containing Improve bodies or bleach them through oxidation or make them soluble in borax. she can also be improved by chlorination, in some cases also by reduction.

Claims (3)

PATENT CLAIMS: i. Process for the manufacture of resinous products from acetaldehyde, with the exception of products made from phenols and acetaldehyde, by the action of acetylene on water in the presence of catalysts, thereby characterized in that the aldehydes formed are in the same process a continued or increased exposure to the catalyst liquid used for aldehyde formation or subject to the action of other condensing agents until they become resinous Products have passed. 2. The method according to claim i, characterized in that that the condensation or polymerization of the aldehyde by adding organic Bodies at the beginning or in the course of the condensation or. Polymerization reaction favored. 3. The method according to claim i and 2, characterized in that one the entire reaction is carried out in order to promote the ald-ehydric formation from acetylene on in the presence of organic bodies. q .. procedure according to Claim i to 3, characterized in that the resulting products are the further treatment processes that can be considered for the refinement of aldehyde condensation products subject