Epoxy-free, heat curable coating system

Details Epoxy-free, heat curable coating system Epoxy-free, heat curable coating system

C - Chemistry, Metallurgy

09

D

C09D 5/03 (2006.01) C08G 18/38 (2006.01) C08G 18/80 (2006.01) C09D 5/46 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2156898

The invention relates to an epoxy-free, heat-curable coating system of binder resin comprising a hydroxyl-terminated polyester resin with a hydroxyl number of from 20 to 200 mg KOH/g and a glass transition temperature of at least 40~C; a carboxyl-group-containing, reversibly blocked polyisocyanate; a .beta.-hydroxyalkylamide having at least two .beta.-hydroxyalkylamide groups per molecule; and optionally further additives. The invention also relates to a process for preparing the coating system and to the use thereof. The so-obtained epoxy-free, heat-curable coating system can be made by melt-extrusion of all its components. This coating system is toxicologically unobjectionable and can be used to produce weather-resistant protective coatings with mat surfaces.

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