Corrosion resistant coatings

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 163/00 (2006.01) C08G 59/18 (2006.01) C08G 73/02 (2006.01) C08J 3/22 (2006.01) C09D 5/08 (2006.01) C09D 165/00 (2006.01) C09D 179/02 (2006.01)

Patent

CA 2403560

A two-component curable paint composition comprises a base component containing at least one curable resin, and ahardening component which contains a non-conducting polyaniline, and a liquid-phase or molten-phase curing agent capable of curing said curable resin of the resin component and capable of dissolving non-conducting polyaniline. According to the invention, the curing agent comprises an organic aminecompound having at least two primary amine functions linked together by a hydrocarbon chain which is optionally interruptedby at least one heteroatom, said amine compound exhibiting irregularities in the chemical structure of its hydrocarbon chain.The invention also provides a method of preparing paint compositions, a method of forming a paint coating on the surface as well as a coated metal surface. The solutions produced by the invention are stable over extended periods of time, and the anti-corrosive effect of the paint compositions is good even at very low concentrations of the polyaniline.

L'invention concerne une composition de peinture durcissable, à deux composants, comprenant un composant de base contenant au moins une résine durcissable et un composant de durcissement contenant une polyaniline non conductrice, et un agent de durcissement en phase liquide ou fondue permettant le durcissement de la résine ainsi que la solubilisation de la polyaniline non conductrice. L'agent de durcissement comprend, selon l'invention, un composé amine organique possédant au moins deux fonctions amine primaire reliées par une chaîne hydrocarbonée qui contient éventuellement un hétéroatome, ce composé amine montrant des irrégularités dans la structure chimique de sa chaîne hydrocarbonée. L'invention concerne aussi un procédé de préparation de compositions de peinture, un procédé de formation d'un revêtement de peinture sur une surface ainsi qu'une surface métallique revêtue. Les solutions produites par l'invention sont stables sur de longues durées, et l'effet anticorrosion des compositions de peinture est bon même à de très faibles concentrations de la polyaniline.

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