An image display medium including: a pair of electroconductive layers, at least one of which is light-transmissive and which are opposed to each other to form a cell; and a dispersion contained in the cell and including a silicone oil; a colored particulate material dispersed in the silicone oil; and a polymer soluble in the silicone oil. The polymer preferably includes units obtained from a monomer having an acidic group or a basic group and a monomer having the following formula (1):
1
wherein R
1
represents a hydrogen atom or a methyl group; R
2
represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; n is an integer; and x is an integer of from 1 to 3.
                            一种图像显示介质,包括:一对导电层,其中至少有一层是透光的,它们相互对置形成一个单元;以及包含在单元中的分散体,包括
硅油;分散在
硅油中的有色颗粒材料;以及可溶于
硅油的聚合物。聚合物最好包括由具有酸性基团或碱性基团的单体和具有下式(1)的单体得到的单元:
1
其中 R
1
代表氢原子或甲基; R
2
代表氢原子或具有 1 至 4 个碳原子的烷基;n 是整数;x 是 1 至 3 的整数。