An ultra-violet radiation curable ink composition and a...

C - Chemistry – Metallurgy – 09 – D

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C09D 175/04 (2006.01) B41M 1/34 (2006.01) C09D 4/06 (2006.01) C09D 5/00 (2006.01) C09D 11/02 (2006.01) C09D 11/10 (2006.01) C09D 175/16 (2006.01)

Patent

CA 2457494

An ultraviolet radiation curable organic ink composition, comprising 80% to 95% by weight of an epoxy-polyurethane-based ink; 0.5% to 8% by weight of an additive including a mixture of polyethylenic waxes and polythetrafluoroethylenic waxes; 1% to 8% by weight of a blocked aliphatic polyisocyanate catalyst; and an adhesion promoter primer including 0.15% to 3% by weight of a silane, which can be directly included in the ultraviolet radiation curable organic ink composition or independently applied to a substrate, in order that the blocked aliphatic polyisocyanate catalyst promote a polymerization reaction and a crosslinking reaction between the epoxy-polyurethane-based ink and the adhesion promoter, when heated to 160 to 200°C, forming an interpenetration network.

Cette composition de peinture organique durcissable par rayonnement ultraviolet, comporte de 80 % à 95 % en poids d'une peinture à base d'époxypolyuréthanne; de 0.5 % à 8 % en poids d'un additif comprenant un mélange de cires polyéthylènes et de cires polytetrafluoroéthylènes; de 1 % à 8 % en poids d'un catalyseur de polyisocyanate de bloc aliphatique; et un apprêt promoteur d'adhésion comprenant de 0,15 % à 3 % en poids d'un silane, lequel peut être compris dans la composition de peinture organique durcissable par rayonnement ultraviolet ou peut être appliqué à un substrat, pour que le catalyseur de polyisocyanate de bloc aliphatique provoque une réaction de polymérisation et une réaction de concaténation entre la peinture à base d'époxy-polyuréthanne et le promoteur d'adhésion, lorsqu'il est chauffé de 160 ·C à 200 ·C, formant ainsi un réseau d'interpénétration.

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