【摘要】 合成了用于水性体系的聚合物型颜料分散剂———苯乙烯和丙烯酸的共聚物,并采用红外和核磁对所合成的聚合物的结构进行了表征,确定为目标产物。研究了单体摩尔比、反应温度和链转移剂的用量对聚合物的分散性能的影响;确定了苯乙烯和丙烯酸的摩尔比为1.0~1.3、反应温度为90.0~110.0℃、链转移剂的用量为单体总质量的4.0%~6.0%。测试了不同相对分子质量的聚合物的特性粘度,当特性粘度等于15~16时,对颜料的分散性能较好。与日本的同类产品(Johnson Polymer Chemical Ltd.)J-68进行了对比,对颜料黄(C.I.P.Y.3)进行粒度分布的测试,平均粒径小于J-68,而重均比表面积则大于J-68,分散性能优于J-68。更多还原

【Abstract】 Copolymer of styrene and acrylic acid,polymeric dispersant for waterborne pigments systems,was synthesized.The structure of the obtained copolymer was determined by IR and NMR.The influence of reaction parameters,including molar ratio of styrene to acrylic acid,reaction temperature,quantity of chain transfer agent,on the dispersibility of the polymer was investigated.The polymer was prepared by reacting styrene with acrylic acid in molar ratio of 1—1.3∶1 in the presence of 4%—6% of chain transfer agent at 90.0 ℃—110.0 ℃.The special viscosities of the polymers with different molecular weights were detected.The polymer had preferable dispersibility when its special viscosity was 15—16.C.I.Pigment Yellow 3 was dispersed by the above dispersant and the similar Japanese product J-68 respectively.The results indicated that the dispersibility of the the prepared dispersant is superior to that of J-68.更多还原