Patent ID: 6242557
Filing Date: 2001-06-05
Classification: C08G,C09D,Y10T

Abstract:
Crosslinked polyurethane polymers having improved stain release properties, no dirt pick-up and resistance to pressure marking and to hostile environments, based on (per)fluoropolyetheral polymers, comprising repeating units selected from the group consisting of--CF.sub.2 CF.sub.2 O and CR.sub.4 R.sub.5 CF.sub.2 CF.sub.2 O wherein R.sub.4 and R.sub.5 are equal to or different from each other and chosen from H, Cl, F or perfluoroalkyl, with 1-4 C atoms,--CF.sub.2 CF(CF.sub.3)O--, CFYO wherein Y is equal to CF.sub.3, having hydroxyl bifunctional termination, crosslinking being carried out with blocked isocyanates having at least three CNO groups, and fillers and pigments.