| 摘要 |
<p>PURPOSE:To prevent danger for handling and environmental pollution, and also, to improve light resistance, heat resistance and light transmittivity and pigment dispersibility by constituting a dispersant of a specific polyacetal resin. CONSTITUTION:The coloring paste is mainly composed of water, a surfactant, an organic pigment and a dispersant, and the dispersant is constituted of a polyacetal resin shown by a formula. In the formula, X1 and X2 denote two groups of the same kind or different kinds in a hydroxyl group, a carboxyl group and an aldehyde group. As for this polyacetal resin, its dispersibility if satisfactory, the organic pigment is dispersed uniformly and satisfactorily in a water solution, and also, the dispersed organic pigment is scarcely sedimented, and its dispersed state is held extending over a long period. Also, since it is a transparent resin, it is excellent in light transmittivity, and also, excellent in light resistance and heat resistance, and it is not discolored even if heated in the air, therefore, it has an action by which a color filter layer whose color purity is high can be formed, and a color filter of a high quality is derived.</p> |
