Patent ID: 7361782
Filing Date: 2008-04-22
Classification: C07C

Abstract:
1. A fluorochemical isocyanate composition prepared by a process comprising reacting at least one fluorochemical alcohol represented by the formula C n F 2n+1 SO 2 NCH 3 (CH 2 ) m OH, wherein n=4 and m=2 to 4, with 4,4′-diphenylmethane diisocyanate (MDI) in a solvent having a solubility parameter of less than about 8.3 (cal/cm 3 ) 1/2 and a hydrogen bonding index of less than about 4; wherein the molar ratio of fluorochemical alcohol:MDI is from about 1:1 to about 1:1.5; and wherein said composition comprises greater than about 85% monoisocyanate.