Process for preparing polyisocyanates polyisocyanurates...

Details Process for preparing polyisocyanates polyisocyanurates... Process for preparing polyisocyanates polyisocyanurates...

C - Chemistry, Metallurgy

07

D

402/182, 260/248

C07D 251/34 (2006.01) C08G 18/02 (2006.01)

Patent

CA 1200242

PRECIS DE LA DIVULGATION: L'invention concerne un procédé de préparation de polyisocyanates polyisocyanurates, par cyclotrimé- risation catalytique partielle de polyisocyanates avec désactivation ultérieure du catalyseur. Selon l'invention, le catalyseur de cyclotrimérisation est un composé à groupement aminosilylé. Le désactivateur est un composé organique (A), à groupement hydroxyle, (alcool, phénol, silanol...), ou un composé résultant de l'action de groupement isocyanate sur le composé (A) (uréthanne...). Le désactivateur est très efficace et n'engendre ni colo- ration, ni corrosion.

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