DE980038C - Process for making fibrous material water repellent - Google Patents

Description

ISSUED JUNE 26, 1960

P ο So 038.8-43 (F 18338)

have been named as inventors

Addition to additional patent 977

Subject of the German patent 977270 is a further modification of the method for making fibrous material water-repellent according to German Patent 976 508 and its first additional patent 977 044, whereby the fiber material with solutions of ι mol of aluminum alcoholate and 0.2 to 2.5 mol, advantageously 0.3 to 0.8 mol, higher molecular weight aliphatic or cycloaliphatic monocarboxylic acids and from solid to semi-solid paraffinic hydrocarbons Treat in anhydrous organic solvents, then dry and beneficial expose to the action of elevated temperatures, possibly in the presence of moisture target.

In the further modification of the method according to German patent 977 270 it has now been found that you also get a good water-repellent effect if you use solid to semi-solid instead Paraffinic hydrocarbons, thick oily to solid, high molecular weight polychlorinated hydrocarbons and / or natural and / or synthetic waxes and where appropriate, higher molecular weight paraffin hydrocarbons are used.

According to the invention, the fiber material with solutions of 1 mol of aluminum alcoholate and 0.2 up to 2.5 mol, advantageously 0.3 to 0.8 mol, of higher molecular weight aliphatic or cycloaliphatic monocarboxylic acids as well as thick oily to solid, higher molecular weight polychlorinated hydrocarbons and / or from natural or synthetic waxes and optionally from higher molecular weight paraffin hydrocarbons in anhydrous organic

909 626/401

Treated solvents, then dried and advantageously exposed to the action of elevated temperature, optionally in the presence of moisture.
5

example

Air-dry, optionally chemically cleaned rainwear made of cotton, regenerated cellulose, wool or synthetic fiber material is ^{impregnated with the following solution for 10 to 15 minutes at about 20 °} C. in an impregnation machine customary in chemical cleaning in a liquor ratio of 1:15.

8.34 kg of aluminum isopropylate, 3 kg of paraffin, 3.5 kg of stearin, 8 kg of chlorinated paraffin (produced by chlorinating a paraffin from EP 52 to 54 ⁰ C up to a chlorine content of 60%) are each dissolved in 30 l of carbon tetrachloride or perchlorethylene ao ' and the solutions united. After the impregnation, the liquor is drained off, the goods are spun off and the solvent is distilled off. ^{The goods are heated to 90 °} C. for 30 minutes with air at about 30% relative humidity and then finished by ironing. In this way, an excellent beading effect and considerable flame resistance are achieved.

Part or all of the stearin is replaced by the equivalent amount of olein or rosin and / or the aluminum isopropylate by 10 kg of aluminum sec-butylate, one arrives at the same result.

Claims (1)

PATENT CLAIM: Further modification of the process for rendering fibrous material water repellent German patent 977 270 by treating the same with solutions of 1 mol of aluminum alcoholate and 0.2 to 2.5 mol, advantageously 0.3 to 0.8 mol, higher molecular weight aliphatic or of cycloaliphatic monocarboxylic acids and of solid to semi-solid paraffinic hydrocarbons in anhydrous organic solvents and subsequent drying, characterized in that that instead of solid to semi-solid paraffinic hydrocarbons, thick oily to solid higher molecular weight polychlorinated hydrocarbons and / or natural and synthetic Waxes and possibly higher molecular weight. Paraffinic hydrocarbons used. Q 609 578/461 7.56 (909 626/401 6.69)