Carbon black is the best black pigment with excellent coloring power and covering power.it is widely used in coating,paint,color paste,color master batch,ink...However color black is the most difficult to disperse compared with other color pigment.For the new users of carbon black,especially for those to produce water based products such as water-based pigment paste,water-based ink ,water-based coating,water based paint, they may run into troubles on how to improve the dispersion of color black .They may find the carbon black powder floating on the liquid or flocculated in the liquid.. Those are some manifestations of color black is unevenly dispersed.
The factors influencing the dispersity of carbon black.
1. The particle size of carbon black.If the color black with smaller particle is easy to disperse,if the particle size is bigger,it will be more difficult to disperse.
2. The surface properties :the chemical properties and hydrophilic properties of the carbon black surface will affect its dispersity, carbon black with better hydrophilic properties on the surface is easy to disperse.
3. The selection of dispersing agent.Different dispersant have different effect on the carbon black.choose the correct dispersing agent could help improving the dispersity.
4. The shearing force during dispersing process.The higher shear force,the higher dispersity of carbon black.
5. The selection of solvents.Different solvents also have different effects on the carbon black,choose the correct solvents could help improving the dispersity.
1. Choose the correct dispersant: Choosing the correct dispersing agent is the key to improve dispersity of carbon black. Commonly used dispersing agents include surfactants, polymers, colloids, and ion exchange resin. Different dispersants have different dispersing effects on carbon black, the users should select the suitable dispersing agent according to specific conditions.
2. Increase the shear force: the higher the shear force, the higher dispersty of carbon black. By selecting high -speed mixer, high -cut mixer and other equipment, the shear force can be increased to improve the dispersity of carbon black.
3. Choose the correct solvent: Different solvents also affect the dispersing effects of carbon black. Choosing suitable solvents can improve the dispersity of carbon black. Generally speaking,if the carbon black hydrophilicity is poor, should choose the solvents with better hydrophilicity .
4. Control the temperature during the dispersing process : temperature also affects the dispersing effect of carbon black. The higher the temperature, the better the dispersing effect. However, too high temperatures can break the black heat of carbon black and affect its performance. Therefore, the temperature should be controlled during the dispersing process, which is generally suitable for 40-50 ° C..
5. Increase the dispersing time: the longer the dispersing time, the higher the dispersity of csrbon black. During the dispersing process, fully stiring could ensure the carbon black is fully dispersed in the solvent.
6. Choose the appropriate carbon black particle size: carbon black with smaller particle size is easy to disperse. The bigger the particle size, the more difficult it is to be dispersed. When choosing carbon black, choose the appropriate particle size according to the specific situation.
Summary
Improving carbon black dispersity is a complex process, and multiple factors need to be comprehensively considered . Choose suitable dispersing agents, increase shear force, choose suitable solvents, control the temperature of the dispersing process, increase the dispersing time, and choose the appropriate carbon black particle size and other methods can effectively increase the carbon black dispersity. In practical applications, the appropriate method should be selected according to the specific conditions to achieve the best dispersing effect.
Weifang Ruiguang Chemical Co.,LTD ,a Chinese chemical company founded in 1999,,specialized in textile auxiliaries,printing & dyeing auxiliaries.water-borne coating,paper-making additives,leather auxiliaries.Dispersing agent is one of our main products,We have a variety of dispersing agent for different products,pigment dispersants are including.We have some dispersant with excellent dispersity for color black pigment.If you need any supports on improve the dispersity of color black,just feel free to contact Email:lily@ruiguangchem.com.
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