SU887587A1 - Composition for colouring chemical fibers in bulk - Google Patents

Description

one

This invention relates to the field of the chemical industry, in particular, to a composition for dyeing chemical fibers in bulk.

A known composition for dyeing fibers in bulk, comprising carbon black with a specific surface of 130, dispersing agent and solvent having a high molecular weight of 1.

The disadvantage of this composition is poor dispersibility and insufficient stability of the slurry due to poor wettability of the carbon black binder, low dye concentration and narrow range of application.

The closest technical solution to the invention is a composition for dyeing chemical fibers in bulk, containing the following components, wt. %: carbon black gas channel 8-20, triethanolamia 0.1-0.4 nigrosine 1-3 soluble, caprolactan 10-60 and the rest water

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The disadvantage of this composition is to obtain a fiber with a non-intense color.

The purpose of the invention is to increase the color intensity of the fiber.

This goal is achieved due to the fact that the composition is known as carbon black.

contains oxidized furnace soot with a specific geometric surface of 135-170 and an oxygen content of 4-16 weight. % in the following ratio of 5 components, weight. %

Furnace oxidized carbon black 10-25

Nigrosine water-soluble 1-5 Triethanolamine 0.1-0.5

WaterEverything

Furnace soot with a specific geometric surface of more than 135 is obtained by thermal-oxidative decomposition of raw materials in the products of complete combustion of fuel at 1580-1680 ° C.

The use of furnace oxidized soot makes it possible to prepare more concentrated suspensions for dyeing, which is very important due to the remoteness of the plants preparing the compositions from chemical plants. In addition, the use of furnace black with a surface of 135 increases the dye concentration and color intensity of the fibers.

Soot production with a specific surface of more than 170 is difficult (an increase in the process temperature is necessary), and an increase in temperature in the reaction zone to 1700-1750 ° C on the one hand leads to a decrease in the process efficiency (decreases soot yield), and on the other is limited by the refractory strength of the material reactor. The modification to increase the oxygen content and improve its dispersibility is carried out under the conditions of soot production and processing it with various oxidizing agents, in particular, 10-20% nitric acid solution. The content of ki-oxygen on the soot surface is determined by thermochemical analysis method. Carbon blacks with an oxygen content of more than 4% are well wetted by the binder, easily dispersed, they are stable during storage. However, an increase in oxygen on the surface of soot by more than 16% is associated with certain difficulties: first, it is necessary to increase the concentration of the oxidizing agent during the secondary treatment up to 50-60%, and second, the installation of additional devices for the purification of harmful emissions is required, which significantly increases the cost of soot and at the same time the composition for dyeing. The physicochemical parameters of carbon black and the concentration of oxidizing agent for its treatment are given in table. 1. Table 1

Soot samples were obtained with a specific geometric surface of 90 to 170 and an oxygen content of 1.1 to 16%. The increase in the oxygen content is due to the formation on the surface of soot of various oxygen-containing groups as a result of the oxidation of the soot surface layer.

Example 1. 10 wt. % oxidized furnace soot with a specific surface area of 170 and an oxygen content of 8 wt. %, 0.1 weight. % triethanolamine, 1.4 wt. % nigrosine is water-soluble, the rest is water (up to 100), is loaded into a laboratory sand mill and dispersed as in example 1. The highly dispersed suspension is painted with viscose in a concentration of 2% (for a-cellulose). The color intensity of the resulting suspension is 102%.

PRI mme R 2. 9.7 wt. % oxidized furnace black with a specific surface area of 150 and an oxygen content of 16%, 0.2 weight. % triethanolamine, 1.5 wt. % nigrosin soluble, the rest is water (up to 100) is loaded into a laboratory sand mill and dispersed in example 1. The dispersion of the particles of the resulting suspension to 1 micron. The resulting suspension is stained viscose fiber.

The dyed thread has a deep black color. The color intensity of the resulting suspension 103%.

Example 3. 10 wt. % oxidized furnace soot with a specific surface area of 150, 1.5 weight. % nigrosine water soluble.

0.2 weight. % triethanolamine, 59 wt. % caprolactam, the rest is water (up to 100 wt.%) is loaded into a laboratory mill and dispersed as in example 1. The resulting suspension is dyed polyamide fiber during polymerization in a concentration of 1%. The color intensity of the suspension obtained is 104%. The quality of the compositions are given in table 2.

Table 2

As follows from the table. 2 compositions based on oxidized carbon black have a color intensity of more than 100%, have a deeper black color. The color intensity of the fiber is higher than with DG-100 gas channel soot.

Claims (2)

1.Patent of France No. 1560661, cl. From 09С, published. 1967. 2. USSR author's certificate number 532612, cl. C 08J 3 (20), 1976 (prototype).