Polyisocyanate compositions

Details Polyisocyanate compositions Polyisocyanate compositions

C - Chemistry, Metallurgy

08

G

C08G 18/22 (2006.01) B27N 3/00 (2006.01) C07F 7/00 (2006.01) C08K 5/00 (2006.01) C08L 75/00 (2006.01)

Patent

CA 2344505

According to the invention, a polyisocyanate composition comprises a titanium, zirconium or hafnium composition, preferably a titanium or zirconium composition, said composition being a complex of at least one metal selected from the group consisting of titanium, zirconium and hafnium and an acetoacetate ester in which the molar ratio of Ti, Zr or Hf to acetoacetate ester is in the range 1 : 2.5 to 1 : and said acetoacetate ester is an ester of an alcohol containing 1 to 6 carbon atoms. The invention also comprises a process for binding lignocellulosic material using such compositions.

L'invention concerne une composition de polyisocyanate comprenant une composition de titane, de zirconium, ou de hafnium, et de préférence une composition de titane ou de zirconium. Ladite composition est un complexe d'au moins un métal sélectionné dans le groupe constitué par le titane, le zirconium et le hafnium et d'un ester d'acétoacétate dans lequel le rapport molaire de Ti, Zr ou Hf avec ledit ester d'acétoacétate se situe dans la plage de 1/2,5 à 1/10, et l'ester d'acétoacétate est un ester d'un alcool contenant de 1 à 6 atomes de carbone. L'invention concerne également un procédé de liaison d'un matériau lignocellulosique utilisant ces compositions.

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