The present invention relates to a process for preparing dye-comprising aqueous polymer dispersions by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of free-radical initiators, in which at least some of the monomers are employed in the form of an oil-in-water emulsion E1 whose disperse phase comprises at least one oil-soluble dye, wherein the disperse phase of E1 is formed essentially of dye-comprising monomer droplets having a diameter<500 nm.
The present invention also relates to perylene dyes of the formula III as set forth in claim
35.
The present invention relates in addition to dye-comprising formulations which comprise the dye-comprising polymers of the invention and to pigmented formulations which comprise a polymer of the invention comprising optical brightener.
本发明涉及一种制备含
染料的
水性聚合物分散体的工艺,通过自由基
水性乳液聚合
乙烯基不饱和单体,在自由基
引发剂的存在下进行,其中至少有一些单体以E1油包
水乳液的形式使用,其分散相包含至少一种油溶性
染料,其中E1的分散相基本上由直径小于500 nm的含
染料单体液滴形成。本发明还涉及公式III所述的
苝染料。此外,本发明还涉及包含本发明的
染料聚合物的
染料组合物以及包含一种具有光学增白剂的本发明聚合物的
颜料组合物。