| abstract |
Aqueous dispersion of a polyurethane obtainable by reaction of polyisocyanates and isocyanate-reactive compounds in miniemulsion, characterized in that the isocyanate-reactive compounds are at least in part polysiloxanes of the formula I is, where R 1 and R 2 independently of one another represent a monovalent hydrocarbon radical having a maximum of 20 C atoms, which may optionally also contain heteroatoms such as O or N, R 3 and R 4 independently of one another represent a single bond or a divalent hydrocarbon radical having a maximum of 20 C atoms, which may optionally also contain heteroatoms such as O or N, R 5 and R 6 are independently a group OH, SH, NH 2 or NHR 7 and R 7 is a monovalent hydrocarbon radical having a maximum of 20 C atoms, which may optionally also contain heteroatoms such as O or N. and n is an integer from 1 to 100. |