Process for the preparation of recyclate polyols having a...

Details Process for the preparation of recyclate polyols having a... Process for the preparation of recyclate polyols having a...

C - Chemistry, Metallurgy

08

J

C08J 11/24 (2006.01) C08J 11/22 (2006.01)

Patent

CA 2214180

A process for preparing a recyclate polyol obtained from glycolysis of polyurethanes and/or polyurea-polyurethanes comprises reacting scrap polyurethane and/or polyurea- polyurethane with a short-chain compound containing at least 2 OH groups in the presence of a catalyst and admixing a cyclic carbonate. The process results in a recyclate polyol having a low primary aromatic amine content which may be used to produce cellular or non-cellular polyurethanes, polyurea-polyurethanes, or polyisocyanurates.

Méthode pour préparer un polyol de recyclage par glycolyse de polyuréthanes et (ou) de polyurée-polyuréthanes, consistant à faire réagir des polyuréthanes et (ou) des polyurée- polyuréthanes résiduels avec un composé à courte chaîne renfermant au moins deux groupes OH, en présence d'un catalyseur et avec addition d'un carbonate cyclique. Le procédé donne un polyol de recyclage à faible teneur en amine aromatique primaire, pouvant servir à la production de polyuréthanes, polyurée-polyuréthanes ou polyisocyanurates, cellulaires ou non.

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