纺织印染用消泡剂(二)

Antifoamers in Textile Wet Processing(Ⅱ)

<正>4 制备和应用4．重 含硅消泡剂的制备方法4．1．1 硅油直接乳化法以PVA作为增稠剂或稳定剂,在快速搅拌下,徐徐加入硅油,一般硅油含量控制在30%左右,继续快速搅拌,制成分散或乳化液。PVA应先加热溶解,再稀释应用。4．1．2 硅油乳化剂乳化法以低泡乳化剂(司本、吐温等)溶于水中。徐徐加入硅油,用快速搅拌、胶体研磨机或均化器进行乳化,硅油含量控制在30%左右。4．1．3 硅油加入其他填料或添加剂再乳化法该方法适应性比单独硅油好,以硅油加2%SiO_2(气相),高温研磨混和,加入吐温、司本等低泡乳化剂,再徐徐滴加无离子水5%(慢速),继续滴加25%水(中速),再用70%水稀释。最后制成的产品含硅油20%~30%,其余为水和乳化剂等。制备时也有加入异辛醇为添加剂。无机硅的加入,也有先用SiO_210%和硅油90%充分混合制成硅酯,再与硅油共同乳化。

Antifoamer is a kind of important auxiliary in textile wet processing.The application of antifoamer and its process technology were briefed.The variety.constituent.preparation and compounding were discussed.The using results of the domestic and foreign products were concluded.