Hyperdispersant for use in fluorocarbon coating compositions

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 7/12 (2006.01) C09D 127/12 (2006.01)

Patent

CA 2637767

A hyperdispersant for use in a fluorocarbon coating composition is disclosed. The fluorocarbon coating composition generally comprises a fluorocarbon resin, a binder resin, a cross-linking agent, and the hyperdispersant. The hyperdispersant comprises the reaction product of a polyglycidyl oligomer and at least one amino compound. The polyglycidyl oligomer comprises a carbon chain having from 1 to 25 carbon atoms with at least one of an internal ether linkage and an internal ester linkage and comprises a plurality of epoxy groups. The at least one amino compound has a cyclic, heterocyclic, alkyl, or heteroalkyl structure substituted with at least one primary or secondary amine group for reacting with and opening at least one of the epoxy groups.

L'invention concerne un hyperdispersant utilisé dans une composition de revêtement de fluorocarbure. La composition de revêtement de fluorocarbure comprend généralement une résine de fluorocarbure, un liant à base de résine, un agent de réticulation et l'hyperdispersant. L'hyperdispersant comprend le produit de réaction d'un oligomère polyglycidyle et d'au moins un composé amino. L'oligomère polyglycidyle comprend une chaîne de carbone présentant de 1 à 25 atomes de carbone avec au moins une liaison éther interne ou une liaison ester interne, ainsi qu'une pluralité de groupes epoxy. Ledit composé amino présente une structure cyclique, hétérocyclique, alkyle ou hétéroaryle substituée par au moins un groupe amine primaire ou secondaire destiné à réagir avec au moins un des groupes epoxy et à l'ouvrir.

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