SU35370A1 - The method of obtaining condensation products from technical anthracene and aldehydes - Google Patents

Description

Recently, the plastics industry has experienced a great lack of phenol, cresol and other products of this kind. The aforementioned served as an incentive for finding new products that could at least partially replace phenol In condensation products, and which are cheap non-scarce materials.

We have found that by sulfonation, the so-called technical anthracene, both at normal temperature and when heated, a product is formed that can be condensed with aldehydes and ketones into a resinous product, under suitable conditions, transformed into plastic mass by polymerization during pressing and heating up.

As is well known, technical anthracene, which is obtained in the form of garbage in the production of anthracene oil and consisting of a mixture of anthracene, phenanthrone and carbazole, does not find application in any industry. Its quantity is estimated at 10,000 tons per year of ncf throughout the Union. Thus, the plastics industry will be fully provided with this type of raw material.

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The essence of the invention is as follows. A certain amount of technical anthracene is subjected to sulfonation with concentrated sulfuric acid at ordinary temperature or when heated to completely remove the smell of sulfuric and sulfuric anhydrides. Upon termination of the sulfonation, a viscous, gummy black product, well soluble, is formed in water and solvents, which itself does not polymerize. Upon further condensation with aldehydes and ketones, this product forms a water-soluble resin, which, at ordinary temperature, is easily crushed and dried to remove moisture at a temperature not higher than 65 °, during pressing, it becomes non-melting and insoluble, giving plastic mass In the form required product.

Example. 100 3 technical anthracene is sulfurized 150 cc. cm of concentrated sulfuric acid, 100 g of the product obtained undergoes condensation with 200 g of furfural by heating to 100 ° C for 20-30 minutes, after which a solid gummy product is formed which is soluble in water.

The entire amount or part of the product obtained is ground into a fine powder, which, if desired, can be mixed with both mineral fillers (infusorna earth, gypsum), and wood flour or asbestos. The resulting powder, by itself, and in a mixture with fillers, can be pressed into the desired product at a known temperature and pressure.

Example 2. 100 g of technical anthracene sulfated by the above method undergoes condensation with 50 g of 30% formaldehyde for one hour. The resulting product is a black elastic resin that is not soluble in water or in solvents, but only swells in them. This mass is dried at a temperature not higher than 60 ° C, is easily ground into powder and can be pressed either by itself or mixed with fillers into the desired product.

In addition to these aldehydes, other aldehydes, such as acetaldehyde, as well as ketones (anthroquinone and phenanthronquinone) are taken for condensation.

acetone, etc.).

qualities obtained

Phenol can be added to plastic mass to simultaneously condense

in different proportions and a mixture of different aldehydes and ketones in various combinations and ratios.

The sulfonated technical anthracene condensation with aldehydes and ketones can be produced in a mixture with sulfonaphthalene, taken in different ratios.

In addition to sulfo-anthracene, other derivatives of anthracene and fenangron can be condensed as their corresponding hydroxy compounds obtained by treating sulfo-anthracene with various alkalis and generally calcium oxide hydrates, since it is immediately converted into gypsum upon sulfo-anthracene oxidation, thus giving a suitable filler.

The subject matter of the invention.

1. A method for the preparation of condensation products from such-derivative anthracene and aldehydes, characterized in that the condensation with aldehydes and ketones is carried out with the addition of phenol and is subjected to heating for polymerization by pressing. 2. Change the method specified in claim 1, characterized in that condensations take hydroxy compounds of anthracene obtained by treating sulfo-anthracene with alkali, for example, calcium hydroxide.