DE977270C - Process for making fibrous material water repellent - Google Patents

Description

ISSUED SEPTEMBER 9, 1965

Fp2O5lVc / 8k

Patents 976,508 and 977,044 relate to methods of rendering water repellent Fiber material, this being done with solutions of reaction products from ι mol of aluminum alcoholate with 0.2 to 2.5 mol, advantageously 0.3 to 0.8 mol, of higher molecular weight carboxylic acids and from solid to semi-solid paraffin hydrocarbons treated in anhydrous organic solvents and then dries. After drying, the goods are still beneficial to the action of higher temperature, possibly in the presence of moisture.

It has now been found that you also achieve a good water-repellent effect if you instead of the finished reaction products of aluminum alcoholate and the carboxylic acid mixtures of the named components are used. According to the invention, the fiber material is thus with Solutions of 1 mol of aluminum alcoholate and 0.2 to 2.5 mol, advantageously 0.3 to 0.8 mol, higher mol- ao Cular carboxylic acids and from solid to semi-solid paraffinic hydrocarbons in anhydrous organic ones Treated solvents, then dried and advantageously exposed to increased Temperature, possibly in the presence of> 5 moisture.

example 1

Air-dry cotton poplin coats are placed in the liquor for up to 10 minutes at 50 ° C.

509 654/1

Ratio ι: ίο impregnated with a solution which is prepared as follows: 1.4 kg of aluminum ethylate, dissolved in 12 kg of xylene, are diluted with 100 1 of gasoline and in this mixture 1.6 kg of lignite Schwalgatsch, 1.6 kg of ceresin and 2 kg Stearic acid (EP. 55 ⁰ C) dissolved. After impregnation, the liquor is drained off, the goods are spun off and the solvent is distilled off at an elevated temperature. Finally, relative with hot air of 30 ¹ Yo humidity is completed U ¹ hour at 6o ° C and then dried by ironing. In this way, an excellent beading effect is achieved and very good results are also obtained with the well test.

If the stearic acid is replaced by 4 kg of oleic acid or during the preparation of the impregnation liquor 1.5 kg of lauric acid and otherwise works in the same way, excellent ones are also obtained Hydrophobic effects.

If the aluminum ethylate is replaced by 2.1 kg of aluminum isobutylate in the preparation of the impregnation liquor and works in the same way for the rest, you also get an excellent one Beading effect.

Instead of the cotton poplin coats you can also use air-dry rain protection clothing made from polyamide fibers impregnate and finish in the same way.

Example 2

Air-dry wool gabardines are impregnated for 5 to 10 minutes at 20 ^° C. in a liquor ratio of 1:10 with a solution which is produced as follows: 7 kg of a technical solution of halogen-containing! Aluminum ethylate in ethyl acetate (aluminum content = 2.2 V ») is diluted with 100 liters of carbon tetrachloride and dissolved in 2 kg of paraffin (EP. 52 to 54 ° C), 2 kg of ceresin and 1.5 kg of stearic acid (EP. 55 ° C) . After the impregnation, work is carried out in the same way as in Example'i. In this way, an excellent beading effect is achieved.

If the stearic acid is replaced by 2 kg of castor oil fatty acid in the manufacture of the impregnation liquor (SZ. 178, VZ. 197, JZ. 85. 2.30 / 0 OH) or 1.5 kg of rosin and otherwise works in in the same way, an excellent water repellent effect is also obtained.

Example 3

A matte crepe of regenerated cellulose is * Yo moisture predried to 2 and at 65 ⁰ C in a padder with a solution, which is prepared as in Example 2. FIG. After the impregnation, it is squeezed off and dried with air at an elevated temperature. The goods are then heated for 30 minutes in a drying cabinet at 80 ° C. with air at about 20% relative humidity. The treatment gave the fabric a very good beading effect. If acetate rayon satin is treated in the same way, an excellent water-repellent effect is also obtained.

Example 4

Air-dry poplin fabric made of regenerated cellulose or cotton or polyamide is impregnated according to the procedure of Example 3 with a solution which is prepared as follows: 8.34 kg of aluminum isopropoxide and 5 kg of paraffin (EP. 52 to 54 ⁰ C) are in 100 1 Dissolved perchlorethylene and to this the solution of 3V2 kg of technical stearic acid (EP. 55 ⁰ C) in 5 kg of benzene was added with stirring. This treatment gave the fabric a very good beading effect.

If the stearin is partially or completely replaced by rosin and / or aluminum isopropylate by the equivalent amount of aluminum sec-butylate, one arrives at the same result.

Claims (1)

PATENT CLAIM: Modification of the methods for rendering fibrous material water repellent according to the patents 976 508 and 977 044, characterized in that 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 in anhydrous Treated organic solvents, then dried and beneficial to the action exposed to elevated temperature, possibly in the presence of moisture. Considered publications: German Patent No. 496 444; Weber-Martina, "The modern textile finishing process", pp. 547 and 551 (Referate British Patent No. 602 109 and U.S. Patent No. 2,314,135). © 509 629/30 1.56 (509 654/1 9.65)