论文部分内容阅读
以聚醚多元醇和IPDI(异佛尔酮二异氰酸酯)为主要原料,以自制的DJW-330(丙烯酸酯类低聚物)为WPU(水性聚氨酯)乳液的化学改性剂,采用自乳化法合成了性能良好的改性WPUA(水性聚氨酯丙烯酸酯)乳液。结果表明:当R=n(-NCO)/n(-OH)=0.95、w(DJW-330)=1.4%时,改性WPUA乳液的稳定性较好,其粒径分布变宽,耐热性略高于未改性WPU乳液;由于DJW-330与WPU分子间是以化学键的形式结合,故此时改性WPUA压敏胶的初粘力(14#号球)、持粘力(100 min)和180°剥离强度(5.38 N/cm)同时达到最大值。
Polyether polyols and IPDI (isophorone diisocyanate) as the main raw materials, with self-made DJW-330 (acrylate oligomers) WPU (water-based polyurethane) emulsion chemical modifier, the use of self-emulsification synthesis A good performance modified WPUA (water-based polyurethane acrylate) emulsion. The results show that the stability of modified WPUA emulsion is better when R = n (-NCO) / n (-OH) = 0.95 and w (DJW-330) = 1.4% Because of the chemical bond between DJW-330 and WPU molecules, the initial viscosity (ball # 14) and holding capacity (100 min) of modified WPUA PSA are slightly higher than that of unmodified WPU emulsion. ) And 180 ° peel strength (5.38 N / cm) at the same time.