DE410758C - Process for the production of washable and lightfast colors on the fiber - Google Patents

Description

Process for producing washable and lightfast dyeings on the fiber. It is known that by re-coppering certain cotton dyes on the fiber, a better wash and light fastness of the dyeing is achieved (see, for example, BG Schultz, dye tables, 5th edition, p. 1 32 No. 410, 4.12; p. 1 33 No. 4.16, 417; p. 135 No. 424 etc.).

However, the dyeings obtained in this way meet practical requirements not, since the increase in wash fastness is only slight and it increases with repeated use Washing goes down; since this is based on a leaching of the copper, so is also possible the lightfastness back.

It has now been found that on fibers, like cotton and silk, permanent, very light and washfast colorations can be obtained by Azo dyes from the q..q .'-diaminodiphenyl-3.3'-dicarb, onic acid re-coppered on the fiber. The colorations obtained in this way have the high lightfastness of the vat colors and a washfastness that is increased beyond the usual level, which in many cases goes so far goes that it comes close to the washing fastness of the developing and ice colors. Example i.

The disazo dye from i mol. Tetrazo- 'tated 4 # q.' - diaminodiphenyl - 3 # 3 '- dicarboxylic acid, 1 mol. Aoetoacetic - o - chloranilide and 1 mol. I-amino-8-oxynaphthalene-4-sulfonic acid is made in a known way with 2 percent soda and 2o percent Glauber's salt on cotton colored, the color then, as usual, on a fresh bath with 2 to 3 percent Copper sulfate and 3 percent acetic acid aftertreated hot for 20 minutes, then cold rinsed and dried.

The color, a Corinth, turns into a dark green after copper plating above. Example 2.

The 4. #. 1'-diaminodiphenyl-3.3'-dicarboxylic acid, tetrazotized from 1 mol. one mole of phenylβ-naphthylamine and one mole of i-amino-8-oxynaphthalene-4-sulfoic acid Dye produces a purple color on cotton. If it is given, as in example i, post-treated, a blue is obtained.

Example 3.

The product of 2 mol. Tetrazotized 4. # ¢ '-diaminodiphenyl - 3-3'- dicarboxylic acid, 2 mol. Phenyl - (3 - naphthylamine and 1 mol. 5 '5'-Dioxy - 2.2'- dinaphthylamine-7 # 7 '- disulfonic acid, colored in the same way, gives a violet, post-treated a blue.

Example q ..

The dye from 1 mole of tetrazotized q. # 4'-diaminodiphenyl-3 # 3'-dica.rboxylic acid, i mole. Phenyl- (3-naphthylamine and z mol. I-oxynaphthalene-5-sulfonic acid directly produces a violet color on cotton, which is somewhat blue due to re-coppering is moved.

Example 5.

The 4..q .'-diamnodiphenyl-3.3'-dicarboxylic acid, tetrazotized from i mol, i M o1. Phenyl / 3-naphthylamine and 1 mole of resorcinol gives the dye Cotton is a bluish red that turns into a Bordeaux when re-coppering.

Example 6.

The dye from one mole of the same tetrazo compound with one mole of acetoacetic-o-chloroanilide and i mole of i-phenyl-5-pyrazolone-3-carboxylic acid gives an orange directly to cotton, which turns into a yellow-brown through re-coppering.

Example 7.

The dye from one mole of the same tetrazo compound with one mole of acetoacetanilide and 1 mole. Acetoacetanilide-p-carboxylic acid gives a reddish cast on cotton directly Yellow, which changes to a brownish yellow after treatment.

Claims (1)

PATENT CLAIM: Process. for the creation of wash and lightfast dyeings on the fiber, characterized in that azo color. Substances from q. # Q .'-diaminodiphenyl-3 # 3'-dicarboxylic acid re-coppered on the fiber.