Knowledge related to carbon black dispersion
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Dear experts: I would like to ask about the dispersion of carbon black in hot melt adhesives – which types of carbon black are easy to disperse, and are additives necessary?
To achieve good dispersion in the rubber compound, it is necessary that the particle size of carbon black be appropriate; particles that are too fine are difficult to disperse evenly and tend to agglomerate. It seems that carbon black with a secondary structure is easier to disperse evenly.
I also want to learn about this stuff
1. The smaller the particles of carbon black, the greater its cohesive energy, and it is less likely to disperse; therefore, carbon black with excessively small particles should not be used. On the other hand, carbon black with too large particles has poor dyeing properties and limited UV shielding capabilities. Thus, a balance needs to be struck based on specific circumstances, with experimental data used to make the decision. 2. The dispersion of carbon black is also related to its wetting capacity with the rubber compound; to improve this wetting capacity, the carbon black can be treated in advance with coupling agents. 3. Using dispersants in the rubber compound can also achieve a good dispersion effect; polyethylene wax, paraffin wax, etc. can be used as dispersants.
Yes, it is definitely necessary to use a coupling agent, and also the dispersion of carbon black in the melt requires attention to be paid in the processing techniques
I’m working on emulsified wax. I wonder how carbon black can be dispersed in an emulsion system? The main components are water, kerosene, and wax
If a coupling agent is required, a proper processing technique must be designed in order to achieve the desired results……