水性聚氨酯涂层剂的合成研究

Research on Synthesis of Aqueous Polyurethane Coating Agent

4.添加剂对改善变色泛黄的近期效应 由芳香族异氰酸酯TDI生成的聚酯型聚氨酯稳定性较差,耐候性较差,在热和光的作用下易产生色泽变黄的问题,一般认为产生如下变化:

The synthesis of aq. PU coating agent TNT-APU was presented in details including the synthetic routes, exptl. methodes, designing of the macromol. structures, compns., condition optimization and discussion of the results.