Radiation curable waterborne composition

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 101/00 (2006.01) C08G 83/00 (2006.01) C09D 201/00 (2006.01)

Patent

CA 2545707

A radiation curable waterborne composition is disclosed. Said composition comprises at least one amphiphilic dendritic polymer, at least one non- amphiphilic radiation curable oligomer or polymer, water and optionally at least one initiator initiating and/or promoting radiation curing. Said at least one amphiphilic dendritic polymer is built up from a polyhydric dendritic core polymer having terminal hydroxyl groups and at least one carboxylic acid and at least one adduct, obtainable by addition of a monoalkylated polyethylene glycol to a dicarboxylic acid or anhydride, each bonded to at least one terminal hydroxyl group in said polyhydric dendritic core polymer.

L'invention concerne une composition aqueuse durcissable par exposition à un rayonnement. La composition comprend au moins un polymère dendritique amphiphile, au moins un oligomère ou un polymère non amphiphile durcissable par l'exposition au rayonnement, de l'eau et éventuellement au moins un initiateur déclenchant et/ou activant le durcissement par exposition au rayonnement. Le(s) polymère(s) dendritique(s) amphiphile(s) est/sont formé(s) à partir d'un polymère central dendritique polyhydrique comportant des groupes hydroxyle terminaux ; d'au moins un acide carboxylique et d'au moins un produit d'addition pouvant être obtenu par l'addition d'un polyéthylène glycol monoalkylé sur un acide ou un anhydride dicarboxylique, chacun de ceux-ci étant lié à au moins un groupe hydroxyle terminal du polymère central dendritique polyhydrique.

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