news Breakthrough Progress and Application of Low Odor Foaming Polyurethane Catalyst ZF-11 in the Field of Waterproof Materials 1. The past and present of polyurethane catalysts: from nothing to something, from something to exce... 03/1231Breakthrough Progress and Application of Low Odor Foaming Polyurethane Catalyst ZF-11 in the Field of Waterproof Materials