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Acrylic copolymers are also suitable for formulating pigment concentrates. The broad variety of monomers available allows the development of wetting and dispersing additives which are suitable for all kinds of pigments and compatible with many different binders. Acrylic copolymers can be modified, so that coatings containing them become very water resistant. Hydrophilic polyether chains also provide steric stabilisation of the pigment particles. A-B copolymers or comb-like structures are possible.

CRP (controlled radical polymerisation) can be used to make A-B-A copolymers and a variety of different structural geometries. Additives of these species show outstanding wetting and viscosity reduction, especially in the case of very fine organic pigments.

Figure 2.6c: Structural example of a methacrylic-polyether copolymer