FLUORINATED POLYURETHANES CONTAINING POLYOXYPERFLUOROALKYLENE BLOCKS ENDOWED WITH IMPROVED MECHANICAL CHARACTERISTICS

摘要

Fluorinated polyurethanes, having improved mechanical characteristics and a glass transition temperature lower than -80 DEG C., containing polyoxyperfluoroalkylene blocks deriving from perfluoropolyethers having hydroxylated end groups and/or from perfluoropolyethers having isocyanate end groups and furthermore units deriving from an aromatic or a cycloaliphatic diol.