PVC／纳米碳酸钙复合树脂工业化生产及控制

摘要

采用原位聚合的方法制备了PVC／纳米碳酸钙复合树脂，考察了纳米碳酸钙加入量对聚合体系的影响，以及纳米碳酸钙加入量、加料工艺、复合分散剂配比对PVc／纳米碳酸钙复合树脂粒度分布的影响。结果表明：最佳工艺条件为纳米碳酸钙用量为4份（以VCM用量为100份计），采用倒加料工艺，复合分散剂m（HPMC60）：m（KH-20）=1：3。%PVCano-CaCO3 composite resins were prepared by in-situ polymerization process. Influcnccs of nano-CaCO3 dosages on polymerization system were investigated as well as the influences of nano-CaCO3 dosages, feeding mode and composite dispersing agent ratio on the particle size distribution of PVC/ nano-CaCO3 composite resins. The results show that the optimum process conditions arc as follows： nano-CaCO3 dosages arc 4 phr （based on VCM）, reverse feeding mode is adopted, and composite dispersing agent ratio is rn （HPMC60） ： m （KH- 20） = 1 ： 3.