Carbamate functional addition polymers and a method for...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 20/00 (2006.01) C08F 8/08 (2006.01) C08F 20/02 (2006.01) C08F 20/04 (2006.01) C08F 20/06 (2006.01) C08F 20/08 (2006.01)

Patent

CA 2570646

Disclosed is a method for making nongelled addition polymers, especially carbamate functional additional polymers from linear unsaturated anhydrides. The method comprises reacting an unsaturated linear anhydride with an active hydrogen compound to provide two monomers comprising polymerizable C=C bonds, at least one of said monomers comprising an acid functional group; polymerizing the polymerizable C=C bonds of the two monomers to provide an acid functional polymerization product; and reacting the acid functional polymerization product with an epoxy functional compound to provide a nongelled addition polymer, wherein the disclosed method does not include a step comprising the physical removal of any acid functional monomers or polymerization products. Also disclosed is a curable coating composition containing the resulting carbamate functional polymer, as well as a coated substrate comprising a cured film resulting from the application and curing of the disclosed curable coating composition.

La présente invention a pour objet une méthode de fabrication de polymères d~addition non-gel, plus particulièrement des polymères d~addition portant des fonctions carbamate, à partir d'anhydrides linéaires insaturés. Ladite méthode inclut la réaction d'un anhydride linéaire insaturé avec un composé comportant un hydrogène actif pour obtenir deux monomères comportant des liaisons C=C polymérisables, l'un au moins desdits monomères comportant un groupement fonctionnel acide ; la polymérisation des liaisons C=C polymérisables des deux monomères afin d~obtenir un produit de polymérisation portant des groupements acides ; et la réaction dudit produit de polymérisation avec un composé de type époxy afin d'obtenir un polymère d~addition non-gel. La méthode décrite n~inclut pas d~étape impliquant l'élimination physique de monomères ou de produits de polymérisation portant des groupements acides. La présente invention a également pour objet une préparation durcissable pour traitement de surface qui contient le polymère portant des fonctions carbamate résultant, ainsi qu~un substrat traité en surface comprenant une pellicule de surface durcie résultant de l~application et de la prise de ladite préparation.

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