To provide a dispersing agent that contains a water-soluble polymer that has excellent dispersibility and stability over time even for a high concentration of a dispersoid such as a pigment and can give a pigment slurry having stable viscosity characteristics and redispersibility due to a large dispersion stabilization effect.
A dispersing agent containing a water-soluble polymer and/or an alkali metal salt or an ammonium salt of the water-soluble polymer, the water-soluble polymer containing (A) an ethylenically unsaturated monocarboxylic acid monomer or an anhydride thereof, or an ethylenically unsaturated dicarboxylic acid monomer or an anhydride thereof, and (B) a polyether compound, a ratio [(B)/(A)] of the number of moles of alkylene oxide added in component (B) relative to the number of moles of carboxyl group in component (A) being no greater than 0.6, and component (B) being less than 25 wt % relative to the total amount.
为了提供一种含有
水溶性聚合物的分散剂,该分散剂即使对高浓度的分散体(如
颜料)也具有优异的分散性和长期稳定性,并且由于具有较大的分散稳定效果,可以得到具有稳定粘度特性和再分散性的
颜料浆。
一种含有
水溶性聚合物和/或该
水溶性聚合物的碱
金属盐或
铵盐的分散剂,该
水溶性聚合物含有 (A)
乙烯基不饱和单
羧酸单体或其酸酐、或
乙烯基不饱和二
羧酸单体或其酸酐,以及 (B) 聚醚化合物,组分 (B) 中添加的氧化亚烷摩尔数与组分 (A) 中羧基摩尔数之比[(B)/(A)]不大于 0.6,而组分(B)相对于总量小于 25 wt%。