Preparation of low-viscosity, isocyanurate and urethane...

Details Preparation of low-viscosity, isocyanurate and urethane... Preparation of low-viscosity, isocyanurate and urethane...

C - Chemistry, Metallurgy

08

G

C08G 18/79 (2006.01) C08G 18/28 (2006.01) C08G 18/78 (2006.01) C08G 18/80 (2006.01)

Patent

CA 2105325

A process for the preparation of isocyanurate and urethane group-containing and, if desired, uretdiode and allophanate group-containing polyisocyanate mixtures by partially cyclizing organic, preferably (cyclo)aliphatic diisocyanates, in the presence of trimerization catalysts, deactivating these catalysts, reacting the partially trimerized, isocyanurate and, if desired, uretdiode group-containing polyisocyanate mixture with 0.5 to 10 mol % of at least one aliphatic or cycloaliphatic alcohol and/or polyoxyalkylene alcohol, and separating off the monomeric diisocyanates.

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