Patent ID: 7985479
Filing Date: 2011-07-26
Classification: C08G,C09J,Y10T

Abstract:
1. A polyisocyanate mixture comprising: (A) 15 to 35 wt. % of diphenylmethane diisocyanate with 2 aromatic rings; (B) 10 to 30 wt. % of polymeric diphenylmethane diisocyanate with 3 or more aromatic rings; and (C) 40 to 75 wt. % of an isocyanate-functional polyurethane component; wherein the polyisocyanate mixture has an isocyanate content of 12 to 20 wt. %, an isocyanate functionality of >2.4, a viscosity of <10,000 mPa·s at 25° C., and a shear rate of 80 l/s, and wherein the isocyanate-functional polyurethane component comprises a mixture of prepolymers prepared by reacting: (i) a first mixture comprising: with (ii) a second mixture comprising: