| abstract |
PURPOSE: To obtain a stable polymer applied to various substrates to impart high-order oil repellency and water repellency by forming a polymer containing a specified perfluoroalkyl-containing segment and a specified siloxane segment. n CONSTITUTION: A urethane-containing polymer contains about 5-70 wt.% of a perfluoroalkyl-containing segment of a bis-R 1 -containing neopentyleneoxy unit and about 20-95 wt.% of a siloxane-containing segment and the perfluoroalkyl-containing segment has structural formula I and the siloxane- containing segment has structural formula II. In the formulae, R 1 is 18C straight chain or branched chain perfluoroalkyl, etc.; E is 1-10C straight chain or branched chain alkylene, etc.; X is -S-, etc.; R 2 and R a -R e are each 18C straight chain or branched chain alkyl, etc.; X 1 and X 2 are each 1-500; Z is 1-20 and D is an aromatic, aliphatic, cyclic-aliphatic or aromatic-aliphatic diisocyanate residue. n COPYRIGHT: (C)1992,JPO |