DE1247261B - Process for dyeing structures made of hydrophobic materials - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .;

D 06p

German class: 8 m-1/01

Number: 1247261

File number: F 36061 IV c / 8 m

Filing date: November 4 , 1960

Opened on: August 17 , 1967

The subject of patent 1139 810 is a process for dyeing structures such as threads, fibers, foils, tapes, etc., made of hydrophobic materials such as aromatic polyesters, in particular polyethylene terephthalates, synthetic polyamides and polyurethanes, polyacrylonitrile and its copolymers, cellulose esters and polyolefins , whereby the structures to be colored are first treated with aromatic compounds containing primary and / or secondary amino groups and then treated with quinones.

In further processing of the inventive concept explained in more detail in the main patent, it has now been found that in many cases particularly favorable results are achieved if the dyebaths or Padding liquors which contain the quinone components, or alkali dichromate in the presence of acid or sodium chlorite. This prevents premature and undesirable consumption of the quinone component, before it is absorbed onto the fiber or developed into a dye with the amine component is avoided, and thus the dye yield and the quality of the dyeing achieved, particularly with regard to it the rubbing fastness improved.

Process for coloring structures
made of hydrophobic materials

Addendum to the patent: 1139 810

Applicant:

Paint factories Bayer Aktiengesellschaft,
Leverkusen

Named as inventor:

Dr. Max Schwarz, Leverkusen;

Dr. Walter Wunder, Cologne-Flittard;

Dr. Winfried Kruckenberg, Leverkusen

Example 1

5 g Polyäthylenglykolterephthalatfaser in the form of hanks are -methoxydiphenylamin in a bath of 200 ml of water with 0.4 g of 4-amino-2 ', with the addition of 0.4 g of a conventional dispersing agent, 2 g / 1 sodium sulfide and 3 g / 1 trichlorobenzene Treated for 1 to 1½ hours at boiling temperature. After an intermediate rinse of the goods, the dye is developed in a bath of 200 ml of water with 0.2 g of 2,5- dichloroquinone, 0.05 g of potassium dichromate and 0.05 g of sulfuric acid for half an hour at boiling temperature.

After a reductive aftertreatment, a black dyeing with excellent fastness properties is obtained. If 0.5 g of phenylbenzoquinone is used instead of 2,5- dichloroquinone, a blue-gray color is obtained.

Example 2

5 g of polyethylene glycol terephthalate fibers are, as described in Example 1 , pretreated. The dye is developed in a bath of 200 ml of water, which contains benzoquinone (0.25 g) made into a paste with 0.5 g of hydrochloric acid and 0.2 g of potassium dichromate, for 30 minutes at boiling temperature.

A black dyeing with good fastness properties is obtained after the customary reductive aftertreatment.

Example 3

g of polyethylene glycol terephthalate fiber are placed in a bath of 200 ml of water with 0.4 g of 4- benzoylammo -2,5 -dimethoxyanüin, 0.4 g of a conventional dispersant, 2 g / 1 sodium sulfite and 3 g / 1 trichlorobenzene for 1 to 1.5 hours at boiling temperature treated. After an intermediate rinse of the goods, the dye is developed in a bath of 200 ml of water with 0.2 g of 2,5- dichloroquinone and .0.2 g of sodium chlorite for half an hour at boiling temperature.

After a reductive aftertreatment, a brown-black dyeing with good fastness properties is obtained.

Claims (1)

Claim: Design of the process for dyeing structures made of hydrophobic materials by treatment with aromatic compounds containing primary and / or secondary amino groups and then with quinone according to Patent 1139810, characterized in that baths or padding liquors are used which, in addition to the quinone component, also contain alkali metal dichromate in the presence of Contain acid or sodium chlorite. Considered publications:
German publication No. 1079 587. When the application was announced, two staining tables were displayed.