无皂苯丙乳液的制备工艺研究

Study on the preparation of soap-free styrene-acrylic latex

通过将反应型乳化剂DNS-86与DNS-1035复配,引入交联单体丙烯酸羟乙酯(HEA),合成了一系列性能优异的无皂苯丙乳液粘合剂.结果表明:固含量为(45±2)%,单体转化率较高,乳液凝胶率较小,且乳液离心稳定性、储存稳定性、稀释稳定性、电解质(Ca2+)稳定性和酸碱稳定性均良好;采用无皂苯丙乳液印花的织物耐干、湿摩擦色牢度和耐皂洗色牢度等级与市售涂料印花粘合剂相当;红外光谱(FT-IR)分析表明:优化后的苯丙乳液中没有C C双键存在,即没有反应型乳化剂的剩余,实现了无皂乳液聚合.

A series of soap-free styrene-acrylic latex with excellent performance were synthesized through the compound of reactive emulsifier DNS-86 and DNS-1035 and the introduction of cross-linking monomer hydroxyethyl acrylate（HEA）. The results showed that solids content was（45 ± 2）%, the monomer conversion rate was higher, and the emulsion coagulation rate was lower. In addition, the emulsion centrifugal stability, storage stability, dilution stability, electrolytes（Ca2 ＋） stability, and p H stability were good. The dry and wet rubbing fastness and soaping fastness of soap-free styrene-acrylic latex printed fabric were similar with those of pigment printing binder on market. Finally, infrared spectrum（FT-IR） analysis indicated that C C functional group did not existed in the optimized styrene and butyl-acrylic emulsion, namely there was no remaining reactive emulsifier. Thus soap-free emulsion polymerization was realized.