Pigment Dispersion perparation

12/1/2016 Steric stabilization
To ensure an effective stabilization, the additive envelope around the pigment particles should be as thick as possible –
a thickness in excess of around 10 nm is generally considered sufficient. This means that the polymer segments of the
additive must be as highly solvated as possible, i.e. they must have a good compatibility with the surrounding binder
solution. If there is a poor compatibility, the polymer segments will fold together and then will not lie closely on the
pigment surface: the stabilization against flocculation is then marginal. When selecting an additive for a specific
system it is necessary to consider the compatibility between the additive and the binder.
The mechanism of steric stabilization can be applied both to aqueous as well as non-aqueous systems; of course, the
additives must have the appropriate compatibility. While the electrostatic stabilization functions virtually only in
aqueous systems, this restriction does not apply to steric stabilization.
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