Effects of Fine-Particle PR-177 and Co-dispersion with Sulfonic Acid Derivative of PR-177 on Properties of Pigment-Dispersion-Type Color Resist Inks for LCD Color Filters

摘要

Dispersions of a pigment, 4,4'-diamino-1,1'-bianthraquinone (PR-177) were prepered by using and color resist inks using the pigment dispersion for LCD color filters were also prepared. The viscosity and the mean particle size of those pigment dispersions were measured, and the effects of fine-particle PR-177 and the addition of sulfonic acid derivative of PR-177 on the color properties of the resist inks were investigated. The color resist inks prepared with fine-particle PR-177 of which specific surface area was 113.5m~2/g, showed higher brightness and high contrast ratio, but the Viscosity and thixotropy index (TI value) of the pigment dispersions increased.