C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 8/16 (2006.01)
Patent
CA 2347122
The invention concerns a liquid composition comprising more than 50 wt. % of frit, a solvent and a thermosetting resin containing: at least a polyhydroxypolyester and/or a polyhydroxypolyacrylate whereof the OH index ranges between 3 and 100 mg KOH/g and with a molecular weight less than 100000 g/mol; at least a crosslinking agent adapted to cause the hydroxy functions of said polymers to react by transesterification or polyaddition. Said composition provides stability facilitating coating on sheet metal at room temperature, good adherence of the crosslinked coating on the sheet metal, enabling forming before vitrification of the frit.
Composition liquide comprenant plus de 50 % en poids de fritte, un solvant, et une résine thermodurcissable comprenant: au moins un polyhydroxypolyester et/ou un polyhydroxypolyacrylate dont l'indice OH est compris entre 3 et 100 mg KOH/g et de poids moléculaire moyen inférieur à 100 000 g/mole; au moins un agent de réticulation adapté pour faire réagir les fonctions "hydroxy" desdits polymères par transestérification ou par polyaddition. Avantages: stabilité facilitant l'enduction sur tôles à température ambiante; bonne adhérence de la couche réticulée sur la tôle, permettant la mise en forme avant vitrification de la fritte.
Cholet Vincent
Genevay Jean-Pierre
Hellouin Remy
Becker Industrie
Robic
Sollac
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