Low viscosity polyisocyanate mixtures and coating...

Details Low viscosity polyisocyanate mixtures and coating... Low viscosity polyisocyanate mixtures and coating...

C - Chemistry, Metallurgy

07

D

C07D 251/34 (2006.01) C08G 18/72 (2006.01) C08G 18/79 (2006.01)

Patent

CA 2196148

The present invention relates to polyisocyanate mixtures containing 30 to 98 wt.% of a polyisocyanate A) having a viscosity exceeding 700 mPa.s at 23°C and 2 to 70 wt% of a (cyclo)aliphatic triisocyanate B) having a molecular weight of 200 to 600 and a viscosity below 200 mPa.s at 23°C, provided that the polyisocyanate mixtures have one-half of the viscosity of polyisocyanate component A) when triisocyanate B) is present in an amount of 30 wt.%, preferably in an amount of 20 wt.%, wherein the preceding percentages are based on the total weight of the polyisocyanate mixtures. The present invention also relates to coating compositions containing these polyisocyanate mixtures, optionally in blocked form.

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