Use of aqueous polyurethane dispersions in formulations for crack sealing coating systems
申请人:——
公开号:US20030088045A1
公开(公告)日:2003-05-08
The use of aqueous isocyanate-free polyurethane dispersions with a solids content of ≧30 wt. % and a solvent content of ≦10 wt. % in formulations for crack sealing coating systems is disclosed. Said use may be in a) primer, floating screed, floor coatings, spray coatings and/or sealants, on, preferably, primed building surfaces, b) roof coatings or paints and c) sealing of open-cast or subterranean mines. According to the invention, the disclosed polyurethane dispersions are not just more environmentally-friendly and easier to use, but also give a partly improved product property to the corresponding crack sealing coating systems, such as, for example, mechanical properties (tensile strength, stretching under tension, tear elongation), UV resistance and colour stability.