Coating compositions having hyperbranched polymers and...

C - Chemistry – Metallurgy – 09 – D

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C09D 175/04 (2006.01) C09D 175/12 (2006.01)

Patent

CA 2637604

Coating compositions include a crosslinker and a hyperbranched polymer and methods of producing coating compositions include combining a crosslinker and a hyperbranched polymer. Branching portions of the hyperbranched polymer include a linkage via a carbonyl group and at least two linkages via methylene groups. Branching compounds used in a process to form a hyperbranched polymer include at least one hydroxyl group and at least two oxirane groups. Resulting hyperbranched polymers can include dendrimers. Coating compositions having hyperbranched polymers and crosslinkers can be applied to a substrate and cured to form a crosslinked film.

L'invention concerne des compositions de revêtement comprenant un agent de réticulation et un polymère hyperramifié et des procédés de production de compositions de revêtement comprenant la combinaison d'un agent de réticulation et d'un polymère hyperramifié. Des parties de ramification du polymère hyperramifié comprennent une liaison via un groupe carbonyle et au moins deux liaisons via des groupes méthylène. Des composés de ramification utilisés dans un procédé pour former un polymère hyperramifié comprennent au moins un groupe hydroxyle et au moins deux groupes oxirane. Les polymères hyperramifiés résultants peuvent comprendre des dendrimères. Des compositions de revêtement comprenant des polymères hyperramifiés et des agents de réticulation peuvent être appliqués sur un substrat et durcis pour former un film réticulé.

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