POWDER COATING COMPOSITION

摘要

A powder coating composition includes fluoro-modified polyurethane (meth)acrylate. The fluoro-modified polyurethane (meth)acrylate is prepared from an isocyanate component, a hydroxy-C2-C4-alkyl (meth)acrylate and an alcohol component comprising a perfluoroalkyl alcohol that are reacted stoichiometrically with one another, providing the powder coating composition a fluorine content (calculated as elementary fluorine with molecular mass 19) in a range of about 0.1 to about 3 wt %, the wt % based on the total weight of the powder coating composition The powder coating composition based on the fluoromodified polyurethane (meth)acrylate provides a highly improved flow, chemical resistance and particularly an improved and sustainable self-cleaning effect of the coatings.

主权项

1. A powder coating composition comprising a fluoro-modified polyurethane (meth)acrylate prepared from an isocyanate component, a hydroxy-C2-C4-alkyl (meth)acrylate and an alcohol component comprising a perfluoroalkyl alcohol reacted stoichiometrically with one another, wherein the powder coating composition has a fluorine content (calculated as elementary fluorine with molecular mass 19) in a range of about 0.1 to about 3 wt %, the wt % based on the total weight of the powder coating composition, and wherein the perfluoroalkyl alcohol comprises a perfluoralkyl-containing polymeric polyol being an aliphatic and/or cycloaliphatic polyether polyol having —OCH2F2n+1 groups with n=1 or 2.