SU659523A1 - Method of obtaining sulphated commercial carbon - Google Patents

Description

one

This invention relates to the field of pigment production for printing inks, in particular, to a process for producing sulphated carbon black.

A known method for producing sulfonated carbon black by treating carbon black in an aqueous medium at 20-80 ° C with a sulphating agent. volume, which is used as sulfuric acid or sulfur oxides, followed by separation of the target product by filtration and decantation 1.

However, the printing ink obtained on the basis of sulfonated carbon has a low resistance to solvents, gives considerable dusting and a shallow blue tint. In order to impart a blue tint, blue dyes, dissolved in a binder, are introduced into the inks. After printing on paper, delamination of dyes and carbon occurs, which leads to the appearance of a blue halo around black characters on the front and back of the paper,

In order to increase the color fastness to solvents, reduce the dusting of the paint and deepen its shade, it is proposed as a sulphating agent 30

use acidic bright blue anthraquinone dye in the amount of 0.6-1.2 wt. in relation to carbon.

The method consists in the fact that technical carbon is treated with an acid bright blue anthraquinone dye in an aqueous medium at 20, followed by isolation of the target product by filtration and decantation. At the same time, it is unnecessary to introduce additional dye into the composition of black paints, and this improves the quality of printed impressions.

II p and me R 1. In a horizontal mixer with two shaped blades, 138 parts by weight are placed. 340 part by weight of highly dispersed carbon black PMN-130. 0.5% aqueous solution of acid bright blue anthraquinone dye and stirred at 80 ° C for 30 minutes. Then the suspension is filtered through a paper filter and carbon black is decanted with hot water. The filtrate and decantrate are transparent. The contents of the filter are dried at 2-3 hours in a vacuum 4-oven to a residual moisture content of 0.8-1%.

Example 2. In a horizontal mixer with two 2-shaped lo-pastes, 196 parts by weight are placed. medium carbon black carbon Dag-105 A, add 250 weight.h. A 0.5% aqueous solution of acid bright blue anthraquinone dyes and stirred at 40 ° C for 45 min. The aqueous phase is then separated with a mixture of 60 parts by weight. eophthalic acid, 24 weight.hour bleaching linseed oil and 150 weight. lacquer based on 40% solution of lokauch cycle in paraffin hydrocarbon (fraction 2B-290C). After draining, the colorless aqueous phases separated; parry the residue at 100 ° C to a moisture content of up to 2% for 1.5 hours. Then 210 ppm are added. lacquer on the basis of a 30% aqueous solution of phenol-formal 1-resin in a mixture of paraffin hydrocarbon (fraction 260-290С) and linseed oil in a ratio of 1: 2, 24 weight parts. paraffin hydrocarbon fraction 260-290s, 3 weight.h. naphthenate-cobalt and 3 weight.h. naphthenate-lead driers. After stirring for 30 minutes, the color composition is ground on a three-roll paint-and-brushing machine 2 times and the quality of the paint is monitored. -. Samples of dry black carbon and black paint with a blue tint were tested for resistance to chemical reagents: water, hydrochloric acid, caustic soda, ethyl alcohol. The test results are shown in Table. Table 2 gives the formulations of paints. Table 3 presents the printing-techiological and strength properties of prints with an ink thickness of 2 microns on porous newsprint paper of the Balakhiinsk Pulp and Paper Mill, obtained under standard conditions on an IGT sampler. Thus, the proposed carbon sulphurization process significantly improves the properties of the resulting pigment. The strength characteristics of the separately dyed acid bright blue anthraquinone dye are lower than those of sulphurized carbon, and are 4 points for resistance to solvents. Measurements on a densitometer showed that the average optical density of an imprint produced on Shepel Darbye’s coated paper with an ink thickness of 2.0 μm was based on DMG-105 A carbon black that was not treated with a 0.5% aqueous solution of a bright bright blue anthraquinone dye, equal to 1.45 units of density. The average optical density of the imprint made on coated paper of the Chapelle company with 2.0 µm thick ink layer based on carbon black dag-105 A, treated with 0.5% aqueous ki solution lotnogo bright blue anthraquinone dye, is 1.96 ed.plotn., which confirms the significant deepening black. The introduction of sulfonated carbon black only in newspaper inks for high-speed printing in a high way gives an economic effect of about 1 million rubles. 10 thousand tons of paint. Table

Highly dispersed carbon black PMN-130 treated with a 0.5% aqueous solution of an acid bright blue anthraquinone dye

Paint in example 2

Components

No. 1 on the outcome of carbon carbon paint

Carbon black

Dag-105 A

Technical carbon PM-30 in

Induin oleate

PS-28 mineral oil

MP-12 cylinder oil

Industrial oil IS-45 Note:

Printed and technological properties of prints

Beautiful power,%

The degree of blue color,%

Optical density (optical density)

The degree of dusting paint (units of optical density)

Imprint density to the effects of chemical reagents (points)

Table 2

Paint

No. 3 on carbon modified with a bright blue anthraquinone dye

15.0

15.0

21.0

21.0 54.0 54.0 10.0 10.0

Table Paint

No. 1 JJ 2 No. 3

100.0 105.0 110.0 100.0 103.0 108.0

0.96. 0.98 I, 02, 0.45 0.3.0 0.20 V paint No. 1 PM-30 V technical carbon was introduced to reduce dusting. Sulfonated carbon has a low degree of dusting.