Heat-curable powder coating composition

Details Heat-curable powder coating composition Heat-curable powder coating composition

C - Chemistry, Metallurgy

09

D

C09D 5/03 (2006.01) C08K 5/00 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2741749

The invention relates to a one component heat-curable powder coating composition comprising a resin containing reactive unsaturations and wherein all said reactive unsaturations are carbon carbon double bonds connected directly to an electron withdrawing group, a thermal initiation system comprising a transition metal catalyst and a peroxide, wherein the peroxide is chosen from the group of peroxyesters, mono-peroxycarbonates and mixtures thereof and a co-crosslinker chosen from the group of vinylethers, vinylesters, vinylamides, itaconates, enamines and mixtures thereof.

L'invention porte sur une composition de revêtement en poudre thermodurcissable à un seul composant comprenant une résine contenant des insaturations réactives et la totalité desdites insaturations réactives étant des doubles liaisons carbone-carbone reliées directement à un groupe électroattracteur, un système d'amorçage thermique comprenant un catalyseur à base de métal de transition et un peroxyde, le peroxyde étant choisi dans le groupe des peroxyesters, des mono-peroxycarbonates et des mélanges de ceux-ci, et un co-agent de réticulation choisi dans le groupe des éthers de vinyle, des esters de vinyle, des vinylamides, des itaconates, des énamines et des mélanges de ceux-ci.

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