Dispersion and Stabilisation of Matting Agents Using Hyperdispersants in UV Wood Coatings

The ability to create a matt effect in traditional water and solvent based coatings using available matting agents is well understood. In contrast, when the coating is UV (100% solid), more matting agent is required to compensate for the lack of film shrinkage (solvent evaporation). This can lead to problems such as:
o Adverse rheological effects e.g. increasing viscosity with time.
o Inconsistent gloss levels.
With the aid of a Hyperdispersant to stabilise the matting agents, these negative effects, generated by insufficient wetting can be overcome to give a coating with consistent: gloss, surface finish, cure and resistance properties.