Lesson 3 Waterborne polyurethane
工業(yè)科技

        The application viscosity of solutions of polyurethanes in organic solvents required fortechnical reasons imposes a restriction in terms of the molecular weight. By contrast,polyurethane/urea dispersions can be produced in the heterogeneous phase with alm......（本文共 8311 字）     [閱讀本文] >>