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

08

G

C08G 73/10 (2006.01)

Patent

CA 2380271

A method for making a polyaspartic ester mixture in-situ comprising the sequential steps of (a) reacting a polypropy-lene oxide 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.

Un procédé de production d'un mélange d'esters polyaspartiques in situ comprend les étapes séquentielles consistant (A) à faire réagir une amine d'oxyde de polypropylène avec une quantité excédentaire d'un ester d'acide fumarique ou maléique pour former un mélange contenant un premier constituant ester polyaspartique et un ester non réagi excédentaire d'acide fumarique ou maléique, et (b) et à ajouter une amine acyclique au mélange provenant de l'étape (a) puis à faire réagir l'amine acyclique avec l'ester excédentaire d'acide fumarique ou maléique pour former un second constituant ester polyaspartique.

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