Powder coatings

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C - Chemistry, Metallurgy

09

D

400/5106

C09D 5/03 (2006.01) C09D 5/46 (2006.01)

Patent

CA 2006930

The invention concerns powder coatings comprising thermoplastic or thermosetting type resin powder particles, each particle carrying at least on the surface thereof, a number of microparticles having an average diameter of 0.001 to 10µ of such resin as having a glass transition temperature of 50° to 150°C and a SP value of 9 to 15, said microparticle optionally containing UV absorber or antioxidant or hardening catalyst, the weight ratio of said microparticles to the total weight of the powder coatings being 0.05 to 30% by weight. The present powder coatings are excellent in blocking resistance and capable of forming a coating with excellent stain resistance, coating appearance and other desired properties.

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