申请人:Gertzmann Rolf
                            
                            
                                公开号:US20070238830A1
                            
                            
                                公开(公告)日:2007-10-11
                            
                            The invention relates to aqueous polyurethane dispersions with a high hard-segment fraction and improved storage stability, to a process for preparing them, and to coating compositions prepared from them.