APP 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] >>
說明： 本文檔由創作者上傳發布，版權歸屬創作者。若內容存在侵權，請點擊