DE256922C - - Google Patents

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- JV * 256922 - CLASS 22 h. GROUP

The surprising observation was made that one can easily alcoholic solutions of acetyl celluloses can be obtained by using the latter at Presence of zinc chloride or rhodan salts, such as rhodanammonium, rhodanic potassium, in alcohols dissolves.

Such solutions, which also remain liquid at room temperature, have before the

ίο previously known technical advantages. she allow multiple uses; because on the one hand, as a result of the relative (at least low volatility of the solvent compared to acetone, vinegar ether, chloroform) are spread with a brush, * like ordinary lacquers, then they give the layer obtainable therefrom does not have any adhering odor. The rhodan salts and that Chlorine zinc, which has a hygroscopic effect in the layer, can be easily washed out with water; the solution is particularly suitable for spinning, and water can be used as a precipitation bath, from which subsequently the alcohol and salts can be easily recovered.

Depending on the intended use, the solutions can also contain additives such as Camphor or its substitute products, as well as paints, pigments, bronzes, fillers, etc.

or liquids which in and of themselves do not dissolve the acetyl celluloses, mixed in will.

The zinc chloride and the rhodan salts also exercise when using such acetylcelluloses, which are already soluble in alcohols alone have a beneficial effect insofar as they prevent the solutions produced in the heat from gelatinizing on cooling.

Example 1.

40

100 parts of acetone-soluble acetyl cellulose are combined with 300 parts of anhydrous Zinc chloride and 600 parts of ethyl alcohol brought to solution.

A completely clear solution is obtained in this way.

Example 2.

100 parts of acetone-soluble acetyl cellulose are combined with 300 parts of anhydrous Zinc chloride, 600 parts of ethyl alcohol and 500 parts of benzene, 25 parts Camphor and then 50 parts of gold bronze were added.

One thus obtains a solution which can be used for bronzing objects of the most varied Kind of very suitable.

Example 3.

100 parts of acetone-soluble acetyl cellulose are in a solution of 300 parts of zinc chloride Dissolved in 600 parts of methyl alcohol, then 200 parts of carbon tetrachloride were added and well mixed.

Example 4.

50 parts of chloroform-soluble acetyl cellulose are used together with 600 parts of zinc chloride dissolved in 600 parts of methyl alcohol.

Claims (1)

. '' The amounts given in the above examples are üeispiei 5., not bound and can do the same 40 parts of chloroform-soluble acetyl cellulose can be varied within wide limits. be ', in a solution of 400 parts of chlorine ■■ -.,. zinc in 400 parts of ethyl alcohol and 120 parts of the patent claim len water dissolved. ■ i . j method of making alcoholic .Example 0. < Solutions of acetyl celluloses, thereby , 100 parts of acetone-soluble Acetylcellolose advertising ... in that the latter at Geden in a solution of 200 parts of thiocyanate \ genwart of zinc chloride or ammonium thiocyanate salts in 600 parts of ethyl alcohol dissolved. with or without the addition of other suitable ones It goes without saying that one is to dissolve in the substances in alcohols. EERUN. PRINTED IN THE REICHSDRUCKEREI.