Method for preparing low viscosity tricondensate...

Details Method for preparing low viscosity tricondensate... Method for preparing low viscosity tricondensate...

C - Chemistry, Metallurgy

08

G

C08G 18/79 (2006.01) C07D 251/34 (2006.01) C08G 18/02 (2006.01) C08G 18/78 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2326235

The invention concerns a method for preparing a tricondensate polyfunctional isocyanate composition, preferably comprising at least an isocyanurate and/or biuret group, which consists in adding a tricondensate polyfunctional isocyanate, or a mixture of different tricondensate polyfunctional isocyanates, obtained by (cyclo)condensation, in particular (cyclo)trimerization of one or several identical or different isocyanate monomers and optionally of another monomer, an allophanate of one or several identical or different isocyanates, or a mixture of different allophanates, the isocyanates or isocyanate monomer mixtures used for preparing the polyfunctional isocyanate(s) being identical to or different from the isocyanate(s) or isocyanate mixture used for preparing the allophanate(s).

Cette invention concerne un procédé de préparation d'une composition d'isocyanates polyfonctionnels tricondensats, de préférence comprenant au moins un groupe isocyanurate et/ou biuret, consistant à ajouter à un isocyanate polyfonctionnel tricondensat, ou à un mélange de différents isocyanates polyfonctionnels tricondensats, obtenus par (cyclo)condensation, notamment (cyclo)trimérisation d'un ou plusieurs isocyanates monomères identiques ou différents et éventuellement d'un autre monomère, un allophanate d'un ou plusieurs isocyanates identiques ou différents, ou un mélange de différents allophanates, les isocyanates ou mélanges d'isocyanates monomères utilisés pour la préparation du(des) isocyanate(s) polyfonctionnel(s) étant identiques ou différents du(des) isocyanate(s) ou du mélange d'isocyanates utilisés pour la préparation du(des) allophanate(s).

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