炭黑增强聚氨酯耐磨微孔涂层的构筑与性能

Construction and Performance of Carbon Black Reinforced Polyurethane Wear-Resistant Microporous Coating

聚氨酯微孔涂层在保持一定孔径分布率的同时,具有良好的弹性、硬度和极好的抛光研磨性,可作为抛光材料。以炭黑为增强填料与聚氨酯共混制备复合浆料,采用PU/DMF/H;O湿法交换技术,在超细纤维合成革基布上构筑炭黑/聚氨酯微孔涂层。研究炭黑用量、有机硅泡孔调节剂用量、基布含水率对聚氨酯涂层微孔结构、耐磨性和力学性能的影响。试验结果表明:以HDW-0070 HPM为基体树脂,控制炭黑用量为13.0%,有机硅助剂用量为1.5%(以聚氨酯有效质量计),基布含水率为20%,凝固浴DMF浓度为20%,温度25℃,凝固时间为20 min可获得孔隙率高、孔径分布均匀的耐磨聚氨酯微孔涂层。

The polyurethane microporous coating has good elasticity, hardness and excellent polishing and abrasive properties, and can be used as a polishing material while maintaining a certain pore size distribution rate. A composite sizing agent was prepared by mixing carbon black used as a reinforcing filler and polyurethane. Using PU/DMF/H;O wet exchange technology, a carbon black/polyurethane microporous coating was constructed on the superfine fiber synthetic leather base. The effects of amount of carbon black, amount of silicone cell regulator, and base moisture content on microporous structure, wear resistance and mechanical properties of polyurethane coating were studied. The experimental results show that HDW-0070 HPM used as matrix resin, under the conditions of the base moisture content is controlled to be 20%, amount of carbon black is 13.0%, amount of silicone surfactant is 1.5%(based on effective mass of polyurethane), DMF concentration of coagulation bath is 20%, temperature is 25 ℃, and solidification time is 20 min, a wear-resistant polyurethane microporous coating with high porosity and uniform pore size distribution are obtained.