反应详情

Examples of the high boiling organic solvents are phthalic acid alkyl esters (e.g., dibutyl phthalate, dioctyl phthalate, etc.), phosphoric acid esters (e.g., diphenyl phosphate, triphenyl phosphate, tricresyl phosphate, dioctylbutyl phosphate, etc.), citric acid esters (e.g., tributyl acetylcitrate, etc.), benzoic acid esters (e.g., octyl benzoate, etc.), alkylamides (e.g., diethyllaurylamide, etc.), fatty acid esters (e.g., dibutoxyethyl succinate, dioctyl azelate, etc.), trimesic acid esters (e.g., tributyl trimesate, etc.), etc. Also, examples of the low boiling organic solvents are organic solvents having a boiling point of about 30° C. to 160° C., such as lower alkyl acetates (e.g., ethyl acetate, butyl acetate, etc.), ethyl propionate, secondary butyl alcohol, methyl isobutyl ketone, β-ethoxyethyl acetate, methyl cellosolve acetate, cyclohexanone, etc. The dye providing substance is dissolved in the aforesaid high boiling organic solvent or the low boiling organic solvent and then dispersed in a hydrophilic colloid. In this case, a mixture of the high boiling organic solvent and the low boiling organic solvent may be used.