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

C - Chemistry – Metallurgy – 03 – C

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C03C 17/32 (2006.01) B41M 1/34 (2006.01) C09D 11/10 (2006.01)

Patent

CA 2353983

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 polytetrafluoroethylenic waxes; 1 to 7% by weight of an additive that improves the water resistance, made from low and intermediate molecular weight polyamide, to be added just before applying the prepared ink composition because this composition, once prepared, lasts less than 8 hours; and an adhesion promoter primer including 0.15% to 3% by weight of a silane.

L'invention concerne une composition de peinture organique polymérisable aux UV Cette composition contient de 80 % à 95 % en poids d'une peinture à base d'époxypolyuréthane; de 0,5 % à 8 % en poids d'un additif comprenant un mélange de cires de polyéthylène et de cires de polytétrafluoréthylène; de 1 % à 7 % en poids d'un agent résistant à l'eau, obtenu à partir d'un polyamide à poids moléculaire faible ou moyen, lequel agent doit être ajouté de préférence juste avant l'application de la composition de peinture préparée, étant donné que cette composition, une fois préparée, ne dure pas plus de 8 heures. L'invention concerne également un apprêt promoteur d'adhésion contenant de 0,15 % à 3 % en poids d'un silane.

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