Dual cure coating composition and processes for using the same

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 175/00 (2006.01) B05D 3/02 (2006.01) B05D 7/02 (2006.01) C08G 18/79 (2006.01) C08J 3/24 (2006.01) C09D 175/16 (2006.01) B05D 3/06 (2006.01) B05D 7/00 (2006.01)

Patent

CA 2457343

The dual cure coating composition requires both radiation and heat energy to cure and comprises a radiation curable component (al), a thermally curable binder component (a2), and a thermally curable crosslinking component (a3). Radiation curable component (al) is polymerizable upon exposure to radiation and comprises at least two functional groups (al 1) comprising at least one bond activatable with radiation. Thermally curable binder component (a2) is polymerizable upon exposure to heat, and comprises (a21) at least two functional groups which are reactive with functional groups (a31), and a polydispersity of less than 4Ø Thermally curable crosslinking component (a3) comprises functional groups (a31) which are reactive with functional groups (a2l). The invention further comprises methods of making coated surfaces that have both optimum porosity sealing and adhesion.

La présente invention concerne une composition de revêtement à double polymérisation qui nécessite un rayonnement et une énergie thermique pour polymériser, et qui comprend un composant durcissable aux rayonnements (a1), un composant liant thermodurcissable (a2), et un composant de réticulation thermodurcissable (a3). Le composant durcissable aux rayonnements (a1) est polymérisable par exposition à un rayonnement et renferme au moins deux groupes fonctionnels (a11) comprenant au moins une liaison activable par rayonnement. Le composant liant thermodurcissable (a2) est polymérisable par exposition à la chaleur, et renferme (a21) au moins deux groupes fonctionnels qui réagissent avec les groupes fonctionnels (a31), et une polydispersité inférieure à 4,0. Le composant de réticulation thermodurcissable (a3) renferme des groupes fonctionnels (a31) qui réagissent avec les groupes (a21). L'invention se rapporte en outre à des procédés de fabrication de surfaces revêtues présentant tant une étanchéité de porosité qu'une adhésion optimales.

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