SU1341178A1 - Method of producing blue phthalocyaninic pigments of beta-modification - Google Patents

Abstract

The invention relates to the field of aniline dye industry, in particular, to a method for producing blue phthalocyanine pigments of p-modification, which can be used in paint formulations and polygraphic inks without the use of toxic organic solvents. The proposed method allows to improve the color properties of pigments and the degree of their dispersion (from 0.1-0.3 to 0.05-0.07 nm) due to the fact that in the mixture of copper phthalocyanine on copper with sodium chloride in glycol after dispersion Glycol is used in the amount of 30-50% of the initial load and is redispersed at 115-130 ° C. 2 tab. i (L with 4 00

Description

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The invention relates to the aniline dye industry, in particular, to a method for producing blue phthalo cyanine pigments | 3 modifiers, which can be used in paints and in printing inks without the use of toxic solvents.

A known method of producing blue phthalocyanine pigments | E-modification by dispersing copper phthalocyanine with sodium sulfate in a glycol medium at 62-68 ° C, followed by additional introduction of glycol into the mass and carrying out dispersion-n-and at 65-80 ° C for 2 h, further processing with water and the selection of the target product (USSR author's certificate No. 484239, cl. C 09 B 47/04, 1976).

However, the known method is characterized by low color indices of the pigment obtained — insufficient color intensity (94.6-97.6%), low turnover (2-3 mm) and a degree of dispersion, which allows its use in the textile industry, but not in the printing industry. .

The purpose of the invention is to improve the color properties and the degree of dispersion of the pigment.

The goal is achieved by the fact that in the known method of producing blue phthalocyanine pigment 0-modification sodium chloride is used as the inorganic salt, dispersion is carried out at 65-70 ° C, glycol is added in the amount of 30-50% by weight of its initial load , and re-dispersion is carried out at 115-130 ° C.

Example 1. A paddle dispersion mixer (capacity 1 l) is loaded with 8.0 mas. phthalocyanine copper and 320 ma.ch. finely ground cooked salt. Dry components are homogenized for 10 minutes. Then 100.8 parts by weight are added. diethylene glycol and bring the mass to a plastic state. The dispersion process is carried out at 65-70 ° C for 5 hours, after which it is added to the reaction mass. 50.4 wt.h of diethylene glycol in small portions and the temperature in the mixer is raised to 115 ° C, the mass is stirred for 2 hours, 400 liters of water are added to the mixer, stirred, and

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the paste in the form of a suspension is discharged from the mixer, diluted, filtered, washed from chlorine ions with hot water, drained on a filter and dried at 70-80 ° C. A pigment with good color and rheological properties is obtained.

Example 2. Synthesis of pigment is carried out analogously to example 1, the amount of diethylene glycol to reduce the viscosity of the reaction mass is 30% of the initial charge, the conditioning temperature is 130 C. A pigment is obtained with properties similar to those of the pigment obtained in example 1.

Examples 3-9. The process is carried out similarly to Examples 1 and 2, but the following is used as the organic solvent: its glycols and their mixtures.

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Example Glycol

3 Triethylene glycol

4Polyethylene glycol with Mm 300

5 Polyglycol with MM 600

6 Polyglycol with MM 1000

7, Polyglycol with

MM 1500

8 Polyglycol with MM 6.000

9 Mixtures of glycols from examples 4-8 in any ratio

The use of the invention makes it possible to obtain blue phthalocyanine pigments of the j3-modification, with enhanced color and rheological properties, increased dispersion (up to 0.05-0.07 against 0.1-0.3 nm by a known method), reduces economic pigment production costs, improves sanitary and hygienic conditions of production.

In tab. Figure 1 shows a technical and economic comparison of the methods for obtaining the blue phthalocyanine pigments of the 6-modification according to the invention and according to a known method using aniline in the dispersion process.

In tab. Table 2 shows the effects of particle growth on dispersibility, fluidity and intensity.

Claims (1)

Invention Formula The method of obtaining blue phthalocyanine pigments (3-modification by dispersing copper phthalocyanine with an inorganic salt in a glycol medium at a temperature above 65 ° C, followed by the addition of glycol, re-dispersion Use of highly toxic solvents Specific investment,% The relative cost of 1 ton of pigment,% .T.4.b. l l ji.a2. Test Mode Dispersion Fluidity: Intensity mm% n / µm / 400 vol. 1ЛШ 1Л 1 111111111111111111111 5 2841 (1) Without cultivation 20 3 97.6 292 (1) 22 3 97.5 290 (3) 22 2 94.6 7 With rearing temperature for two hours, treatment with water and isolation of the target product, characterized in that sodium chloride is used as an inorganic salt, dispersion is carried out at bs-C, glycol is added in the amount of 30-50% by weight of its initial load, and re-dispersion is carried out at 115-130 ° C. Table 1 Way Proposed Famous Not there is 95 100 95.6 100 100.0 eleven 22 1-82 Editor N.Kishtulinets Compiled by T. Kalinina Tehred A. Kravchuk Proofreader A.Zimokosov Order 4398/29 Circulation 633 Subscription VNIIGSh of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Continuation of table 2 ten 109.6 15 114.6 15 106.7