Air drying waterborne resin composition

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

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

Patent

CA 2502662

An air drying waterborne resin composition is disclosed. Said resin composition comprises at least one amphiphilic air drying dendritic polymer, at least one non-amphiphilic air drying alkyd resin, at least one drier initiating and/or promoting autoxidation, and water, and optionally at least one anionic and/or nonionic surfactant, and/or at least one coalescent agent. Said at least one amphiphilic air drying dendritic polymer is built up from a polyhydric dendritic core polymer having terminal hydroxyl groups and at least one unsaturated carboxylic acid and at least one adduct, obtainable by addition of a monoalkylated polyethylene glycol to a dicarboxylic acid or anhydride and/or a diisocyanate, each bonded to at least one terminal hydroxyl group in said polyhydric dendritic core polymer.

L'invention concerne une composition de résine d'origine aqueuse séchant à l'air. Cette composition de résine comprend au moins un polymère dendritique amphiphile séchant à l'air, au moins une résine alkyde non amphiphile séchant à l'air, au moins un agent d'initiation de séchage à l'air et/ou promoteur d'oxydation, de l'eau, et éventuellement au moins un tensioactif anionique et/ou non ionique, et/ou au moins un agent de coalescence. Ce polymère dendritique amphiphile séchant à l'air est constitué d'un polymère de base dendritique polyhydrique comportant des groupes hydroxy terminaux et au moins un acide carboxylique insaturé et au moins un adduit, obtenu par addition d'un polyéthylène glycol monoalkylé à un acide ou à un anhydride dicarboxylique et/ou à un diisocynate, chacun lié à au moins un groupe hydroxy terminal de ce polymère de base dendritique polyhydrique.

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