分散剂还可以改善颜料润湿性

颜料分散剂HH2011X主要依靠静电排斥来稳定水性体系中的颜料颗粒. 含有丙烯酸或马来酸酐的聚合物通常用于分散无机颜料颗粒. Carbon black and organic pigments are mainly stabilized by nonylphenol polyoxyethylene ether, but because nonylphenol is toxic, it has been banned in paint formulations. Hydrophobic-hydrophilic amphiphilic block polymer is an excellent pigment dispersant. The hydrophobic segment in the dispersant molecule is coated on the particle surface through the hydrophobic interaction with carbon black and organic pigments, and the hydrophilic segment is coated on the particle surface through both electrostatic and steric hindrance. Provides stability. By controlling the composition and degree of polymerization of the hydrophobic and hydrophilic segments, the maximum dispersion effect can be obtained.

There are significant differences in pigment dispersion in solvent and water-based systems. In solvent systems, 由于溶剂和树脂的表面张力较低，润湿通常较容易，并且不需要特殊添加剂来改善颜料的润湿性. 由于水的表面张力较高, 需要特殊添加剂来降低表面张力，使低表面张力的颜料能够被水相充分润湿.

可逆加成-断裂链转移自由基聚合 (RAFT) 可以合成嵌段聚合物. 利用RAFT技术合成了疏水-亲水两性嵌段聚合物水性分散剂HD-2011, 用于在水中分散炭黑和有机颜料. 经过测试, Hohuan Chemical HH2011分散剂对炭黑和有机颜料具有良好的分散效果. The FW200 color paste and PV23 color paste prepared with HH2011 have narrow pigment particle size distribution, good fluidity, and good thermal stability. The color paste is in latex Good color acceptance in paint.

In coatings, pigments are an important component. Pigments with optimized particle sizes have the greatest hiding power and tinting strength. 然而, during transportation and storage, primary pigment particles will form aggregates or agglomerates. During the coating production process, there is a need to redisperse aggregates or agglomerates into primary particles and to stabilize the primary particles. Only in this way can pigments provide high tinting strength, pigment weather resistance, and storage stability. During the dispersion process, the liquid phase first wets the pigment particles, 然后机械力将聚集体打碎. 分散剂的作用是稳定被打碎的颗粒，并防止它们重新聚集.