Patents

Pigment-Dispersion Photo-Sensitive Coating Solution

August 10, 2005

Patent No. U.S. 6,514,669 B2
Sumitomo Chemical Company has received a patent for a pigment-dispersion photo-sensitive coating solution comprising a binder resin, an organic-solvent and a main pigment dispersed in the solvent, wherein the combined area of peaks detected at a relative retention ratio in the range of 0.68 to 0.72 based on a retention time of dibutyl phthalate and peaks detected at a relative retention ratio in the range of 1.06 to 1.10 based on a retention time of dibutyl phthalate is not more than 50% of the total area of all peaks when the pigment is extracted by ethyl acetate, and the extracts are analyzed by high-speed liquid chromatography using dibutyl phthalate as internal standard, is provided and use of the coating solution ensures that the colored image of stable quality is formed.