水性苯丙分散剂的合成及其分散性能影响因素的研究

Synthesis of Waterborne Styrene-Acrylic Dispersant and Influencing Factors on Pigment Dispensability

采用溶液聚合法,以偶氮二异丁腈(AIBN)为引发剂,苯乙烯(St)、丙烯酸(AA)、丙烯酸丁酯(BA)为原料合成了一系列苯丙树脂作为高分子分散剂。利用傅里叶红外光谱(FT-IR)、差示扫描量热仪(DSC)和凝胶渗透色谱(GPC)证实了合成树脂的结构。本研究分别合成了一系列苯丙分散剂,研究了酸值、平均相对分子质量、玻璃化转变温度和中和剂对颜料研磨时间和涂料稳定性的影响。将自制分散剂与市售分散剂进行了比较,实验结果表明自制分散剂的分散性能达到了市售分散剂的水平,具有实际应用价值。

A series of styrene - acrylic copolymers used as polymeric dispersant were prepared through solution polymerization using styrene （St）, acrylic acid （AA） and butyl acrylate （BA） as monomers, azodiisobutyronitrile （AIBN） as initiator. The structure of resins was confirmed by Fourier Transform infrared spectroscopy （FTIR）. The average molecular weight and glass transition temperature （Tg） were analyzed by Gel Permeation Chromatography （ GPC ） and differential scanning calorimetry （ DSC ）. The effects of acid value, average molecular weight, glass transition temperature of the resin and type of neutralization agent on grinding time and stability of coatings were investigated via orthogonal experiments, respectively. Moreover, the pigment dispensability of self - made dispersant and commercial dispersant products was compared. The results showed that the dispernsability of self - made dispersant was similar to the commercial dispersant products, indicating that the self- made dispersant will have a brilliant market prospect.