Catalyst for curing epoxides

Details Catalyst for curing epoxides Catalyst for curing epoxides

C - Chemistry, Metallurgy

08

G

C08G 59/00 (2006.01) C08G 59/68 (2006.01) C08L 63/00 (2006.01)

Patent

CA 2690295

The invention relates to the use of 1, 3 substituted imidazolium salts of the formula (I), R1 and R3 independently representing an organic group having 1 to 20 C atoms, R2, R4, and R5 independently representing a H atom or an organic group having 1 to 20 C atoms, R4 and R5 also together being able to form an aliphatic or aromatic ring, X representing an anion having a pK B value of less than 13 (measured at 25°C, 1 bar in water or dimethylsulfoxide), and n representing 1, 2 or 3, where 1-ethyl-2,3-dimethylimidazolium acetate and 1-ethyl-2,3-dimethylimidazoliumacetate-acetic acid complex are excluded as the imidazolium salt, as a latent catalyst for curing compositions comprising epoxy compounds.

L'invention concerne l'utilisation de sels d'imidazolium 1,3-substitués de formule (I), dans laquelle R1 et R3 représentent indépendamment l'un de l'autre un radical organique ayant 1 à 20 atomes C, R2, R4 et R5 représentent indépendamment les uns des autres un atome H ou un radical organique ayant 1 à 20 atomes C, R4 et R5 pouvant également former ensemble un cycle aliphatique ou aromatique, X représente un anion ayant une valeur de pKB inférieure à 13 (mesurée à 25 °C, 1 bar dans de l'eau ou du diméthylsulfoxyde) et n représente 1, 2 ou 3, l'acétate de 1-éthyl-2,3-diméthylimidazolium et le complexe acétate de 1-éthyl-2,3-diméthylimidazolium-acide acétique étant exclus en tant que sel d'imidazolium, en tant que catalyseur latent pour le durcissement de compositions contenant des composés époxy.

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