5results about "Naphthalimide/phthalimide dyes" patented technology

The present invention provides a pigment composition that can improve absorbance across the entire visible light spectrum without increasing absorbance in the ultraviolet region. Furthermore, it provides a colored composition and molded article that achieve high light-shielding properties without interfering with active energy ray curing. [Solution] The pigment composition of the present invention comprises one or more compounds (A) represented by the following general formula (i), and a pigment (B). The pigment composition comprises one or more pigments selected from the group consisting of carbon black, benzodifuranone pigments, and perylene pigments. [C1] TIFF2026095407000040.tif17170

The present invention provides a pigment composition that can improve absorbance across the entire visible light region without increasing absorbance in the ultraviolet region. It also provides a colored composition and molded article that can achieve high light-shielding properties without interfering with active energy ray curing. The pigment composition of the present invention comprises one or more compounds (A) represented by the following general formula (i) and a pigment (B). The pigment composition comprises one or more pigments selected from the group consisting of carbon black, benzodifuranone pigments, and perylene pigments. [C1] TIFF0007838715000041.tif17170

This invention relates to a method for preparing easily dispersible pigments using graphene-modified CI Pigment Red 179. Monolayer graphene or monolayer graphene oxide powder and a solvent are added to water and stirred to mix. CI Pigment Red 179 is then added, and the mixture is stirred and slurried to obtain a pigment slurry. A nonionic surfactant is added, and the mixture is stirred and slurried again. The slurry is then dispersed by grinding in a sand mill. An anionic surfactant is added to the dispersed slurry, and the mixture is dried in a spray dryer to obtain an easily dispersible pigment. The easily dispersible pigment obtained by this invention using graphene-modified CI Pigment Red 179 exhibits high tinting strength, small particle size, more concentrated particle size distribution, and good dispersibility when used in coatings and inks. The tinting strength can reach 129%, the average particle size is reduced from 24.140 μm to 4.482 μm, the particle size distribution is more concentrated, and soft, easily dispersible pigment particles are obtained.

This invention discloses a high-temperature resistant fluorescent dye and its preparation method, relating to the field of dyes. In preparing the high-temperature resistant fluorescent dye, 4-bromo-1,8-naphthalenedicarboxylic anhydride is reacted sequentially with allylamine and 4-(N,N-dimethylaminosulfonyl)phenylboronic acid pinacol ester to obtain a modified fluorescent dye. 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl and 3,3',4,4'-biphenyltetracarboxylic dianhydride are polymerized using silica as a template, followed by grafting of an epoxy compound containing double bonds. The silica is then etched with hydrofluoric acid to obtain transparent polyimide porous microspheres. The transparent polyimide porous microspheres, the modified fluorescent dye, and hydrogen-containing silicone oil are reacted to obtain the high-temperature resistant fluorescent dye. The high-temperature resistant fluorescent dye prepared by this invention exhibits excellent migration resistance and high-temperature resistance.