BYK-3938 P: a highly innovative, post-add additive for matting powder coatings – label-free
The matting of powder coatings constitutes a particular
challenge for the coating industry. In contrast to liquid coatings, only minimum
shrinkage occurs during the baking process, meaning that conventional matting is
not possible with powder coatings.
In order to achieve a matt finish, it is possible to reduce the gloss by mixing various
binders that are incompatible with each other; alternatively, the incompatibility of
binders and special hardeners is used for matting. However, some hardeners are
subject to labeling. This ultimately results in labeling of the powder coatings.