abstract |
The present invention relates to aqueous polyurethane-polyurea dispersions having two discrete maxims in the particle size distribution, where the maximum of the fine fraction is between 51 and 150 nm and the maximum of the thick fraction is between 160 and 700 nm The present invention also relates to a process for preparing polyurethane-polyurea dispersions, to coating compositions containing these polyurethane-polyurea dispersions, and to coated substrates prepared from these coating compositions. |