核壳型酮肼自交联苯丙微皂乳液表面施胶剂的合成

采用半连续种子乳液聚合工艺合成了具有核壳结构的酮肼自交联苯乙烯—丙烯酸酯微皂乳液新型表面施胶剂。加入功能性单体双丙酮丙烯酰胺(DAAM)、己二酰肼(ADH)和丙烯酰胺(AM),选用乳化能力较强的非离子乳化剂OP-10和反应型的阴离子乳化剂A-2405的复合乳化剂体系,并对乳液聚合的工艺参数进行了实验研究,得到最佳反应条件为硬软单体比例3∶7,反应温度70℃,反应时间共7h,乳化剂用量6%,功能性单体用量3%,交联pH值为9。在此条件下可制得稳定、转化率高达99%的苯丙乳液。用作表面施胶剂,涂布后的纸页不仅具有优良的抗水性能,而且具有较高的光泽度。

A study on the synthesis of ketone hydrazine self- crosslinking mini-soap styrene-acrylic core/shell emulsion as a surface sizing agent

The synthesis of ketone hydrazine self-crosslinking mini-soap styrene-acrylic emulsion with core-shell structure by semi-continuous seed emulsion polymerization method was studied in this paper. Functional monomers such as DAAM, ADH and AM, and compound emulsifier system consist of non-ionic efficient emulsifier OP-10 and anionic reactive emulsifier A-2405, were added in the emulsion system. The optimum conditions for emulsion polymerization Were obtained： the ratio of hard and soft monomers at 3：7, reaction temperature of 70~C, reaction time of 7h, emulsifier dosage of 6%, functional monomers dosage of 3%, and crosslinking pH of 9. Stability and high conversion styrene-acrylic emulsion was prepared on these conditions. Good water resistance and high gloss were obtained by the emulsion coated on the paper surface.