DE926813C - Process for the production of hard, elastic waxes with low shrinkage - Google Patents

Description

The subject of patent 895 834 is a process for the production of 'hard, elastic waxes with little shrinkage, in which one Esters of high molecular weight fatty acids with tri-5 or polyhydric alcohols that still have a hydroxyl number have, and natural or synthetic resins having a hydroxyl or saturation number have, in a well-known manner, e.g. B. by melting together, mixes and the Then mixed with polyfunctional compounds, which react with hydroxyl or carboxyl groups, crosslinked by heating.

It has now been found that the properties of the waxes obtainable in this way are still essential improve, in particular their hardness and elasticity are more favorable and their shrinkage when The transition from the liquid to the solid state can be reduced even further if you give them amides from higher molecular fatty acids and aliphatic, cycloaliiphatic or aromatic mono-, di- or polyamines incorporated.

Suitable amides are, for example, those of lauric acid, stearic acid, behenic acid and above especially oleic acid, linoleic acid, rapeseed oil fatty acid, ricinoleic acid and other higher molecular weight fatty acids with one or more double bonds and / or hydroxyl groups. Ali's amine components the amides come e.g. B. Consider: aniline,

Cyclohexylamine, hexamethyleneimine, further propylamine, Manopropanolamin, dibutylamine, styrylamine, Palmityläthanolamin, oleylamine, ethylenediamine, diethylenetriamine, triethylenetetramine, Diaminocycldhexan, phenylenediamines, 4, 4'-Dianiinodiphenylmethan, 4, 4-diamino-bis-cyclohexylmethane and benzidine, as well as mixtures of such amines .

The amides can be added to the mixtures before, during or after crosslinking. The applicable Amides of amide can vary within wide limits; appropriately one uses about 3 corresponds to 30%, advantageously 5 to 25% amide on the total amount of finished waxes. The simultaneous application of the same is very good different amides, in particular mono- and diamides, are also tried and tested.

The parts listed in the examples below are parts by weight.

Beispttiel-i

82 parts of a crosslinking pyramid made from 85 parts of morntan wax sarare-pentaerythiril ester (OH-ZaM 100), 12 parts of colophony glycerol ester (OH number 75) and 3 parts of toluyiemdililsöcyanat are mixed with 13 parts of the amide from a trailing-amide hexylamine and di-amide-diiamide from paraffin oxydiamide auisi linoleic acid and 4,4'-diamino-bis-cyclohexylmethane ^{heated to about 150 0} , until a homogeneous mass is formed. A thick, amorphous, hard, very elastic wax is obtained that shows very little shrinkage and is therefore suitable for use with all precision casting wax. By adding dyes, the desired coloration of the product can easily be achieved.

Example 2

85 parts of a networking product made up of 75 parts of Trimeithylolproparuasters der Waichsisäuren from the bleaching of montan wax with chronic acid sulfuric acid (OH number 80 to 100), 20 parts of rosin and 5 parts of hexamethylene diisocyanate are fused with 15 parts of Rubokauirieanii'lid, until the mass has become homogeneous'. The wax obtained in this way di & t bart'umd very ellaisitic; it shows only very little shrinkage.

Claims (1)

PATENT CLAIM: Further development of the process for the production of hard, elastic waxes with little Shrinkage according to patent 89S 834, characterized in that the waxes in addition nor amides from higher molecular weight fatty acids and primary or secondary aliphatic, cycloaliiphatic 'o ^ the airomatic mono-, Di- or polyamines can be used. © 9617 4.55