High-dispersity 48:2 pigment and preparation method thereof
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A high dispersibility, pigment technology, applied in the field of pigments, can solve problems such as poor pigment dispersibility
Inactive Publication Date: 2017-03-08
WUJIANG TUNCUN PIGMENT PLANT
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Problems solved by technology
[0004] Technical problem to be solved: The traditional 48:2 pigment is obtained by coupling a coupling agent component 2.3 acid (2-hydroxy-3-naphthoic acid) and a diazo component 2B acid (4-amino-2-chlorotoluene- 5-sulfonic acid) add rosin soap before or after coupling, adjust the temperature of different pH values, add calcium chloride lake and other post-treatment preparation processes, the pigment particles formed under one process condition have the same or similar characteristics, and the pigment dispersibility is poor
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Embodiment 1
[0018] (1) Take 20 parts by weight of 4-amino-2-chlorotoluene-5-sulfonic acid and add 12 parts by weight of 30wt% liquid caustic soda, add water to heat up and dissolve transparently, add 25.3 parts by weight of 30wt% hydrochloric acid for acid analysis, add ice to cool down to 0°C, add 6.4 parts by weight of sodium nitrite solution, stir with diazo for 50 minutes, add 13.7 parts by weight of 95% calcium chloride aqueous solution and stir for 10 minutes, set aside;
[0019] (2) Add 29 parts by weight of 30wt% liquid caustic soda to the aqueous solution of 17.5 parts by weight of 2-hydroxyl-3-naphthoic acid, dissolve transparently, add the liquid caustic soda of 4.0 parts by weight of rosin and 2.0 parts by weight of 30wt% to prepare rosin soap, condition The temperature is 15°C, add the above 87.5wt% diazo solution, after the color change, add the remaining 12.5wt% diazo solution, after the color change, stir for 60 minutes, raise the temperature to 80°C, keep it warm for 30 mi...
Embodiment 2
[0021] (1) Get 20 parts by weight of 4-amino-2-chlorotoluene-5-sulfonic acid and add 12 parts by weight of 30wt% liquid caustic soda, add water to heat up and dissolve transparently, add 25.3 parts by weight of 30wt% hydrochloric acid for acid analysis, add ice and cool to 0°C, add 6.4 parts by weight of sodium nitrite solution, stir with diazo for 50 minutes, add 13.7 parts by weight of 95 wt% calcium chloride aqueous solution and stir for 10 minutes, set aside;
[0022] (2) Add 29 parts by weight of 30wt% liquid caustic soda to the aqueous solution of 17.5 parts by weight of 2-hydroxyl-3-naphthoic acid, dissolve transparently, add 4.0 parts by weight of rosin and 2.0 parts by weight of 30wt% liquid caustic soda to prepare rosin soap, condition temperature 15°C, add the above 85wt% diazo solution, after the color change, add the remaining 15wt% diazo solution, after the color change, stir for 60 minutes, raise the temperature to 80°C, keep it warm for 30 minutes, cool down to ...
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Abstract
The invention discloses a high-dispersity 48:2 pigment and a preparation method thereof. The preparation method includes the following steps that firstly, 4-chloro-3-methylbenzenesulfonic acid is obtained, 30 wt% liquid caustic soda is added, water is added, the temperature is increased till the mixture is dissolved to be transparent, hydrochloric acid is added for acidification, ice is added to cool the mixture to 0 DEG C, a sodium nitrite solution is added, diazonium stirring is conducted, a calcium chloride aqueous solution is added, and the mixture is stirred for 10 min for use; secondly, 30 wt% liquid caustic soda is added to a 3-hydroxy-2-naphthalenecarboxylic acid aqueous solution and dissolved to be transparent, rosin and 30 wt% liquid caustic soda are added to prepare rosin soap, the condition temperature is 15 DEG C, the diazonium liquid is added, the remaining diazonium liquid is added after coloring, stirring is conducted for 60 min after coloring, the temperature is increased to 80 DEG C, heat preservation is conducted for 30 min, the temperature is reduced to 65 DEG C, the pH is adjusted to 6.5, stirring is conducted for 5 min, and the product is filtered and dried at 80 DEG C. The prepared pigment has good dispersity.
Description
technical field [0001] The invention belongs to the field of pigments, and relates to a high-dispersibility 48:2 pigment and a preparation method thereof. Background technique [0002] Pigment is a kind of colored fine particle powder substance, which is generally insoluble in water, oil, solvent and resin, and can be dispersed in various media. It has hiding power, tinting power, and is relatively stable to light. It is often used to prepare paints, inks, and colored plastics and rubbers, so it can also be called a colorant. From the chemical composition, pigments can be divided into two categories: inorganic pigments and organic pigments, and can be divided into natural pigments and synthetic pigments in terms of their sources. Natural pigments are derived from minerals, such as: cinnabar, red clay, realgar, malachite green, heavy calcium carbonate, wollastonite, barite powder, talcum powder, mica powder, kaolin and so on. Biological sources, such as those from animals: ...
Claims
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Application Information
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