Application of Metallic Color Powder Dispersants
Metallic color powder dispersants are widely used in many industrial fields. The following is an introduction from
the application and use points of different industries:
1. Application of Metallic Color Powder Dispersants in Different Industries
Electroplating Industry
As a naphthalenesulfonic acid methyl ester compound, the dispersant NNO can evenly disperse metal powders in
the preparation of electroplating solution, improve the conductivity and oxidizability of the electroplating solution,
and thus improve the quality of the electroplating layer. The protective film formed by it can also prevent metal
oxidation and corrosion, and ensure the stability of the electroplating process.
Coating Industry
Iron-titanium anti-rust coating: In view of the problem that composite iron-titanium powder is difficult to disperse, a
dispersant needs to be added for wetting and dispersion. For example, FT dispersant reduces the interfacial free energy,
making the pigment easier to break, thereby shortening the grinding time and improving the weather resistance and
storage stability of the coating.
Automotive repair coating: In metallic flash base paint, dispersants can promote the directional arrangement of effect
pigments (such as aluminum powder and pearl powder), improve construction properties, enhance the flashing effect,
and reduce the tendency of pigment sedimentation.
Pigment and ink industry
Dispersant NNO can evenly disperse pigment and ink particles, improve color saturation and brightness, and improve
printing effects. Its strong dispersibility and adsorption ensure that the pigment exists stably in the medium and avoids
agglomeration.
Dye and textile industry
Dispersant NNO can evenly disperse dye particles in textiles, improve dyeing uniformity and effect, and ensure the
stability and durability of textile color.
Powder coating industry
W-2200 metal pigment dispersant can solve the problems of powder spitting and gun blocking of gold and silver
powder, pearl powder, etc. during spraying. By promoting powdering and preventing agglomeration, the powder fluidity
is improved, and the surface coating of the workpiece is more uniform.
2. Key points for the use of metal color powder dispersant
Dispersion process optimization
The dispersant needs to be added in the grinding stage and fully dispersed by high shear force. For nano-scale metal
color powder, low-speed stirring or special stirring blades are required to avoid destroying the pigment structure.
Addition amount control
The addition amount needs to be adjusted according to the pigment type, particle size and dispersant performance. For
example, the recommended addition amount of inorganic pigments is 0.5%-2%, while nano-pigments may require a higher
proportion. It is recommended to determine the optimal dosage through experiments.
Selection of dispersant type
The matching dispersant needs to be selected according to the medium type (water-based, solvent-based, etc.). For example,
a hydrophilic dispersant needs to be used for a water-based system, and a corresponding product needs to be selected
according to the polarity of the solvent for a solvent-based system.
Compatibility with other additives
Dispersants may interact with other additives (such as leveling agents and defoamers). Their compatibility needs to be
evaluated through small-scale experiments, and the order of addition or dosage needs to be adjusted if necessary.
Storage and safety of use
Dispersants should be stored in a cool and dry place to avoid moisture or volatilization. Protective equipment should be
worn during use to prevent contact with skin or eyes. If contact is accidental, rinse immediately with plenty of water and
seek medical attention.
