Aqueous or water-dilutable blocked polyisocyanates and their use for preparing polyurethane clearcoats having substantially reduced thermal yellowing

摘要

The present invention relates to novel aqueous or water- dilutable blocked polyisocyanates and to their use for the production of one- component polyurethane coating compositions, which are stovable at relatively low temperatures of 130 to 150 C. and provide clear coatings having substantially reduced thermal yellowing.