所屬欄目:合成革專業(yè)英語(yǔ)
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] >>