Reduction of the amine content of recycled polyols

Details Reduction of the amine content of recycled polyols Reduction of the amine content of recycled polyols

C - Chemistry, Metallurgy

08

J

C08J 11/24 (2006.01) C08G 18/28 (2006.01) C08G 18/76 (2006.01) C08G 18/83 (2006.01)

Patent

CA 2242980

In a process for reducing the primary amine content of a composition comprising at least one polyol, in which a composition comprising at least one polyol is admixed with at least one isocyanate which contains only secondary and/or tertiary, aliphatically bound isocyanate groups, isocyanate is added in an amount of up to 5 % by weight, based on the total composition, and a polyol preparation is obtained.

Divulgation d'un procédé pour réduire la teneur en amine primaire d'une composition comprenant au moins un polyol. Au cours de ce procédé, on réalise l'admixtion d'une composition renfermant au moins un polyol avec au moins un isocyanate renfermant uniquement des groupements isocyanates secondaires et/ou tertiaires liés de manière aliphatique. L'isocyanate est ajouté en quantité représentant jusqu'à 5 %, du poids de la composition totale, et permet ainsi d'obtenir cette préparation de polyol.

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