POLYVINYL ALCOHOL BLOCK COPOLYMER AND AQUEOUS PIGMENT DISPERSIONS AND RECORDING FLUIDS MADE BY USING THE SAME
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP1609807A1
公开(公告)日:2005-12-28
A problem of the invention is to provide a recording liquid capable of giving a printed matter which is high in printing density, is suppressed in blur, has high printing quality, and has good fastness of a recorded matter including light fastness, water fastness and the like and having a low viscosity, good discharge properties and excellent storage stability.
The invention is concerned with a polyvinyl alcohol based block copolymer represented by the following general formula (1), a pigment dispersion aqueous liquid containing this polyvinyl alcohol based block copolymer and a pigment in an aqueous medium, and a recording liquid containing this pigment dispersion aqueous liquid.
(In the foregoing general formula (1), A represents a polyvinyl alcohol based block; B represents a block containing a hydrophobic segment B' and a hydrophilic or hydrophobic segment B" other than A and B'; X1, X2, X3, and X4 each independently represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, or an aralkyl group (provided that such an organic group has from 1 to 20 carbon atoms and may be linear, branched or cyclic), and X1, X2, X3, and X4 may be different from each other; m1 represents an integer of from 1 to 5; m2 represents an integer of from 0 to 4; and (m1 + m2) represents an integer of from 1 to 5.)
本发明的一个问题是提供一种记录液,该记录液能够得到印刷密度高、抑制模糊、印刷质量高、记录物牢度(包括耐光牢度、耐水色牢度等)好、粘度低、放电性能好和储存稳定性好的印刷品。
本发明涉及一种由以下通式(1)表示的聚乙烯醇基嵌段共聚物,一种在水介质中含有这种聚乙烯醇基嵌段共聚物和颜料的颜料分散水基液,以及一种含有这种颜料分散水基液的记录液。
(在前述通式(1)中,A 代表聚乙烯醇基嵌段;B 代表含有疏水段 B'和除 A 和 B' 以外的亲水或疏水段 B "的嵌段;X1、X2、X3 和 X4 各自独立地代表氢原子、卤素原子、烷基、芳基或芳烷基(条件是此类有机基团具有 1 至 20 个碳原子,并且可以是直链、支链或环链),并且 X1、X2、X3 和 X4 可以彼此不同;m1 代表 1 至 5 的整数;m2 代表 0 至 4 的整数;以及 (m1 + m2) 代表 1 至 5 的整数。)