THERMOSETTING POWDER COMPOSITIONS FOR PRIMER COATINGS SUITABLE FOR PVdF-BASED TOP COATINGS

摘要

Powder compositions comprising 5-15 wt% of a thermosetting binder system based on a resin compatible with PVdF, 50-90 wt % of a thermosetting binder system based on a resin incompatible with PVdF, 0-35 wt % of pigments and 0-3 wt % of levelling agent are suitable for later application of a pigmented PVdF-based top coating. Preferred compositions are based on an epoxy system comprising about 8 wt % of fluorinated or acrylic resin, 5-25 wt % of pigments and 0.7-1 wt % of levelling agent.