C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/10 (2006.01) C08G 18/62 (2006.01)
Patent
CA 2541165
The present invention is directed to a multiple component coating composition comprising (a) a film forming binder component having isocyanate reactive groups; (b) a stable polyisocyanate solution comprising organic liquid and up to 30% by weight, based on the weight of the polyisocyanate solution, of a polyisocyanate having reactive isocyanate groups selected from an aromatic polyisocyanate having tertiary isocyanate groups or a (meth)acrylic polymer containing reactive isocyanate groups; and (c) optionally, a tinting composition comprising pigment, a dispersing agent and an organic liquid carrier; whereby components (a), (b) and (c) are blended together before application to a substrate and after application to a substrate the composition is cured to form a finish. The present invention is also directed to a method of producing a finish on a substrate and to the resulting coated substrate.
La présente invention se rapporte à une composition de revêtement à composants multiples, qui contient : (a) un composant liant filmogène renfermant des groupes réactifs isocyanate ; (b) une solution de polyisocyanate stable renfermant un liquide organique et jusqu'à 30 % poids, sur la base du poids de la solution de polyisocyanate, d'un polyisocyanate possédant des groupes isocyanate réactifs sélectionné parmi un polyisocyanate aromatique possédant des groupes isocyanate tertiaires ou un polymère (méth)acrylique contenant des groupes isocyanate réactifs ; et (c) éventuellement, une composition de coloration contenant un pigment, un agent dispersant et un support liquide organique. Les composants (a), (b) et (c) sont mélangés ensemble avant d'être appliqués sur un substrat, puis, une fois appliquée sur le substrat, la composition est durcie pour former une finition. L'invention concerne aussi un procédé de production d'une finition sur un substrat, ainsi que le substrat revêtu obtenu.
Barsotti Robert
Lamb Douglas Matt
Scopazzi Christopher
E.i. Du Pont de Nemours And Company
Torys Llp
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