核／壳型有机硅改性苯丙乳液印花粘合剂的合成及应用

摘要

A novel polyacrylate emulsion with soft core-hard shell structure was prepared by core-shell seeded-emulsion polymerization , which was modified by vinyl silicone fluid .In the process of preparation , sty-rene (St) and n-butyl acrylate (BA) were set as the monomers of core structure , with methyl methacrylate ( MMA) , iso-octyl methacrylate ( EHA ) , styrene ( St ) and acrylic acid ( AA ) as the monomers of shell structure, with sodium persulfate (NaPS) as the initiator.The self-prepared core-shell emulsion was used as the binder for pigment printing and the performance of application was analyzed .Results showed that the mass ratio of core/shell was set as 6: 4, the dosage of functional monomer acrylic acid ( AA) was set as 2.5%and vinyl silicone fluid (10%-15%) was added to achieve a good modification .The pigment printing experiments showed that the printed fabrics avoided the blocking problems , and had good rubbing fastness , soaping fast-ness, brilliant color, and the handle of printing fabrics was improved .%以过硫酸钠（NaPS）为引发剂，苯乙烯（St）和丙烯酸丁酯（BA）为核单体，甲基丙烯酸甲酯（MMA）、丙烯酸异辛酯（EHA）、苯乙烯（St）、丙烯酸（AA）为壳单体，采用种子乳液聚合法，制备了硬壳软核型苯丙乳液，对其进行有机硅改性，得到核壳型有机硅改性苯丙乳液（简称硅丙乳液），将其用作涂料印花粘合剂。研究了核壳单体质量比、丙烯酸用量、乙烯基硅油用量对乳液性能及印花性能的影响；并用热失重分析仪和透射电镜进行了表征。较佳配方为：核/壳单体质量比为6∶4， AA质量分数为2.5％，乙烯基硅油质量分数为10％～15％。该乳液的理化性能较好，耐热性优于核/壳苯丙乳液，将其用于涂料印花，改善了堵网性，印花织物的干、湿摩擦牢度，皂洗牢度，手感以及表观得色量可以达到工业用华润粘合剂的水平。