Method for coating microporous surfaces

Details Method for coating microporous surfaces Method for coating microporous surfaces

C - Chemistry, Metallurgy

09

D

C09D 175/04 (2006.01) C08J 7/18 (2006.01) C09D 175/16 (2006.01)

Patent

CA 2438840

The invention relates to a method for coating microporous surfaces, comprising pores with a width from 10 to 1.500 nm, by coating the surface in question with at least one coating material which may be hardened thermally, or by actinic radiation, whereupon the resulting layer(s) is/are hardened thermally and with actinic radiation. The coating material or one of the coating materials (a1) comprises at least one component (a11) with, as a statistical mean, at least two functional groups per molecule with at least one bond which may be activated by actinic radiation and which serves for cross-linking with actinic radiation and, optionally, (a12) at least one isocyanate reactive group, (a2) at least one thermally setting component with at least two isocyanate reactive groups and (a3) at least one polyisocyanate.

L'invention concerne un procédé d'enduction de surfaces microporeuses présentant des pores d'une largeur de 10 à 1 500 nm. Selon ce procédé, lesdites surfaces sont recouvertes d'au moins un enduit durcissable thermiquement et par rayonnement actinique, puis la ou les couches formées sont durcies thermiquement ou par rayonnement actinique. Ledit enduit ou au moins un des enduits contient (a1) au moins un constituant qui renferme (a11), en moyenne statistique, au moins deux groupes fonctionnels par molécule ayant une liaison activable par rayonnement actinique, laquelle liaison sert à la réticulation par rayonnement actinique, et éventuellement (a12) au moins un groupe réagissant aux isocyanates, (a2) au moins un constituant thermodurcissable renfermant au moins deux groupes réagissant aux isocyanates et (a3) au moins un polyisocyanate.

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