| abstract |
PURPOSE: To efficiently pulverize dispersed particles by performing the dispersion of a dye and/or a coupler particle in a dispersing medium prepared by adding ammonium isobutylene anhydrous maleate to a polyvinyl alcohol solution. n CONSTITUTION: A coating solution for thermosensitive recording is prepared by mixing a dye dispersion and a coupler dispersion and applied to one surface of a sheet like support and solidified to form a thermosensitive recording layer. In the preparation of at least one of the dye dispersion and the coupler dispersion, a solution containing polyvinyl alcohol and ammonium isobutylene anhydrous maleate is used as the dispersing medium of the dispersion. By this method, dispersed particles are efficiently pulverized into a particle size of 0.7μm or less to be dispersed without bringing about the lowering of the printing density of the obtained thermosensitive recording layer and a thermosensitive recording material of high quality excellent in recording sensitivity can be prepared with high efficiency. n COPYRIGHT: (C)1991,JPO&Japio |