Patent ID: 6790905
Filing Date: 2004-09-14
Classification: C08G,D06M,Y10T

Abstract:
An aqueous dispersion consisting essentially ofA. a partially fluorinated urethane polymer having at least one urea linkage, which compound is the product of the reaction of: (1) at least one organic polyisocyanate containing at least three isocyanate groups; (2) at least one fluorochemical compound which contains per molecule (a) a single functional group having one or more Zerewitinoff hydrogen atoms and (b) at least two carbon atoms, each of which is attached to at least two fluorine atoms; and (3) water in an amount sufficient to react with from about 5% to about 60% of the isocyanate groups in said polyisocyanate; B. a non-fluorinated cationic surfactant; and C. a non-fluorinated nonionic surfactant, said dispersion providing oil and water repellency upon application to a fibrous substrate without causing tip staining.