In-situ preparation of polyaspartic ester mixture

Details In-situ preparation of polyaspartic ester mixture In-situ preparation of polyaspartic ester mixture

C - Chemistry, Metallurgy

07

C

C07C 227/18 (2006.01) C07C 227/08 (2006.01) C07C 229/24 (2006.01)

Patent

CA 2379967

A method for making a polyaspartic ester mixture in-situ comprising the sequential steps of (a) reacting a cyclic amine with an excess amount of an ester of fumaric or maleic acid to form a mixture containing first polyaspartic ester component and excess unreacted ester of fumaric or maleic acid, and (b) adding an acyclic amine to the mixture resulting from step (a) and reacting the acyclic amine with the excess ester of fumaric or maleic acid to form a second polyaspartic ester component.

L'invention concerne un procédé de production in situ d'un mélange d'ester polyaspartique, qui comprend les étapes consécutives suivantes consistant à: a) faire réagir une amine cyclique avec un excédent d'ester d'acide fumarique ou maléique pour former un mélange contenant un premier constituant de l'ester polyaspartique et un excédent d'ester inaltéré d'acide fumarique ou maléique; et b) ajouter une amine acyclique au mélange obtenu de l'étape (a) et faire réagir l'amine acyclique avec l'excédent d'ester d'acide fumarique ou maléique pour former un second constituant de l'ester polyaspartique.

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