申请人:E.I. DU PONT DE NEMOURS
AND COMPANY
公开号:EP1609825A1
公开(公告)日:2005-12-28
A titanium dioxide slurry comprises (a) a titanium dioxide pigment; (b) a combination of dispersants comprising: (1) a graft copolymer having a weight average molecular weight of about 4,000 to 100,000, comprising about 90 to 50% by weight of a polymeric backbone and correspondingly about 10 to 50% by weight of macromonomer side chains attached to the backbone, the polymeric backbone and macromonomer side chains comprising 100 wt% of the graft copolymer, wherein (i) the polymeric backbone is hydrophobic in comparison to the macromonomer side chains and comprises one or more polymerized ethylenically unsaturated hydrophobic monomers and, optionally, up to about 20% by weight, based on the weight of the graft copolymer, of polymerized ethylenically unsaturated acid monomers; and (ii) each of the macromonomer side chains individually is a hydrophilic polymer containing acid groups attached to the polymeric backbone at a single terminal point and (A) has a weight average molecular weight of about 1,000 to 30,000, and (B) comprises from about 2% to about 100% by weight, based on the weight of the macromonomer side chain, of a polymerized ethylenically unsaturated acid monomer and (C) wherein the acid groups are at least partially neutralized with an inorganic base and/or an amine; (2) a block copolymer of type AB, ABA, or ABC wherein at least one of the blocks in the block copolymer is an adsorbing segment and wherein at least one of the blocks in the block copolymer is a stabilizing segment; and (c) a liquid carrier.
二氧化钛浆料包括 (a) 二氧化钛颜料;(b) 分散剂组合,包括(1) 接枝共聚物,其重量平均分子量约为 4,000 至 100,000,包括约 90 至 50%(按重量计)的聚合物主链和相应地约 10 至 50%(按重量计)连接到主链上的大单体侧链,聚合物主链和大单体侧链占接枝共聚物的 100 wt%、其中(i) 聚合物主链与大单体侧链相比是疏水性的,并包括一种或多种聚合乙烯基不饱和疏水单体,以及可选地,基于接枝共聚物重量,最多约20%(重量)的聚合乙烯基不饱和酸单体;(ii) 每条大单体侧链都是亲水性聚合物,含有在单个末端点连接到聚合物骨架的酸基,并且 (A) 具有约 1,000 至 30,000 的重量平均分子量,以及 (B) 基于大单体侧链的重量,包含约 2%至约 100%(按重量计)的聚合乙烯基不饱和酸单体,以及 (C) 其中酸基至少部分被无机碱和/或胺中和;(2) AB、ABA 或 ABC 型嵌段共聚物,其中嵌段共聚物中至少有一个嵌段是吸附段,嵌 段共聚物中至少有一个嵌段是稳定段;以及 (c) 液体载体。