Aqueous dispersions having improved stability and which are particularly well suited for use as aqueous ink jet ink compositions comprise an aqueous vehicle which comprises water or a mixture of water and a organic solvent; a particulate solid, preferably a pigment; and a polyoxazoline or polyoxazine dispersant selected from the group of AB, ABA, and BAB block copolymers wherein the A block is hydrophobic, and the B block is hydrophilic, and wherein the polymer as a whole has a solubility in the aqueous vehicle of at least 0.1 wt % at 25°C.
水性分散体具有更高的稳定性,特别适合用作
水性喷墨墨
水组合物,它包括
水性载体,其中包含
水或
水与有机溶剂的混合物;颗粒状固体,最好是
颜料;以及选自 AB、ABA 和 BAB 嵌段共聚物的聚
恶唑啉或聚恶嗪分散剂,其中 A 嵌段疏
水,B 嵌段亲
水,聚合物整体在
水性载体中的溶解度在 25°C 时至少为 0.1 wt %。