Low gloss free radical powder coatings

Details Low gloss free radical powder coatings Low gloss free radical powder coatings

C - Chemistry, Metallurgy

09

D

C09D 5/03 (2006.01) C08G 65/332 (2006.01) C08K 9/02 (2006.01) C08K 9/06 (2006.01) C08L 71/02 (2006.01) C09D 7/00 (2006.01) C09D 167/06 (2006.01) C09D 171/02 (2006.01) C09D 175/16 (2006.01) C08K 7/16 (2006.01) C08L 33/06 (2006.01)

Patent

CA 2447211

The present invention is directed to a powder coating composition that produces a low gloss coating upon cure. The powder coating composition includes one or more crosslinkable base polymer, a crosslinkable acrylic polymer and one or more free radical initiators. By adding spheroidal particles to the powder coating composition further reduction in gloss can be obtained while improving smoothness. These compositions are well suited to produce coatings on metallic substrates, such as automotive bodies and non- metallic substrates, such as reconstituted wood substrates, used for desk or table tops.

L'invention concerne une composition de revêtement en poudre produisant un revêtement à faible brillant après traitement. Cette composition de revêtement en poudre comprend un ou plusieurs polymères de base réticulables, un polymère acrylique réticulable et un ou plusieurs initiateurs radicalaires. L'ajout de particules sphéroïdales à la composition de revêtement en poudre permet de réduire davantage le brillant et d'améliorer l'aspect lisse du revêtement. Ces compositions conviennent bien pour produire des revêtements sur substrats métalliques tels que des carrosseries d'automobile, et sur substrats non métalliques tels que des substrats de bois reconstitué pour plateaux de table ou de bureau.

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