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Pohang, South Korea

Kim S.H.,First Color Co. | Kim J.H.,First Color Co. | Yang S.W.,First Color Co. | Kim D.-S.,Korea Institute of Ceramic Engineering And Technology | And 2 more authors.
Applied Chemistry for Engineering | Year: 2014

In this study, the diarylide compound pigment of high hiding power and vivid color was synthesized successfully by controlling several factors such as pH, coupler solution temperature, kind and addition amount of dispersion precursor, and crystallization temperature in the process of coupling synthesis. The properties of samples were measured by the means of FT-IR, UV-Vis spectroscopy, PSA, zeta potential, and turbiscan. It was found that the highly dispersive sample could be prepared by introducing the dispersive precursor. © 2014 The Korean Society of Industrial and Engineering Chemistry. All rights reserved. Source


Kim J.H.,First Color Co. | Kim S.H.,Pukyong National University | Kim S.J.,Pukyong National University | Hong S.-S.,Pukyong National University | And 3 more authors.
Applied Chemistry for Engineering | Year: 2012

The ε type copper phthalocyanine (ε-CuPc), called as a pigment blue 15:6, is a significant material to produce a blue pixel in LCD (Liquid Crystal Display) panel. In this study, ε-CuPc sample was synthesized at various reaction conditions by applying the seed method using ε-CuPc nanoparticles as a seed. Adequate synthetic conditions of the samples were selected by analyzing and comparing crystalline structure, crystalline purity, microstructure, and synthetic yield of the samples with α and β crystalline CuPc samples. The chemical and crystalline structure of the samples were tested using FT-IR spectrometer and X-ray diffractometry, respectively. The shape of the particle was examined using field emission scanning electiron microscope while the thermal property was tested utilizing thermogravimetric analysis. Source


Kim J.H.,First Color Co. | Yang S.W.,First Color Co. | Kim D.-S.,Korea Institute of Ceramic Engineering And Technology | Wu G.Z.,Pukyong National University | And 2 more authors.
Applied Chemistry for Engineering | Year: 2014

To prepare diketopyrrolopyrrole (DPP) red 254 pigment with high shield and bright color, DPP red 254 crude previously synthesized was treated at various thermal-treat temperature, addition derivative and ball-milling. The properties of samples were measured by the means of FT-IR, UV-Vis spectroscopy, TEM, PSA, BET surface area analyzer, viscometer and spectrophotometer. It was found that solvent thermal-treatment of the sample prepared after ball-milling as nano-scale was very effective method in pigmentation process. © 2014 The Korean Society of Industrial and Engineering Chemistry. All rights reserved. Source

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