BLACK PIGMENT DISPERSION AND CHROMATIC COLOR PIGMENT DISPERSION

• Main Author: KATAYAMA KAZUYA
• Format: Patent
• Language: English; Korean
• Published: 03.01.2023
• Subjects: ADHESIVES; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; LAKES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

An objective of the present invention is to prevent a pigment dispersion from gelling when preparing the pigment dispersion containing a black pigment or a colored pigment, prevent the viscosity of the pigment dispersion from changing during storage, and increase the dispersibility of the pigment. According to the present invention, a black pigment dispersion comprises: a black pigment; a dispersant which is copolymer formed of a monomer A having a structure of chemical formula 1, a monomer B having a basic functional group having a structure of chemical formula 2, and a monomer C capable of being polymerized with the monomer A and the monomer B, wherein an amine value is 120 mgKOH/g or more and 200 mgKOH/g or less; and an epoxy (meth)acrylate resin having a molecular weight of 10,000 to 20,000 and an acid value of 50 to 150 mgKOH/g. In the case of colored pigments, a pigment derivative having a sulfonic acid group in a quinophthalone skeleton is used. [과제] 흑색 안료 또는 유채색 안료를 함유하는 안료 분산체를 조제할 때, 분산체가 겔화되거나, 보존 중에 분산체의 점도가 변화하는 것을 방지하고, 안료의 분산성을 향상시키는 것. [해결수단] 흑색 안료; 분산제로서 화학식 1의 구조를 갖는 단량체 A; 화학식 2의 구조를 갖는, 염기성 관능기를 갖는 단량체 B; 단량체 A 및 단량체 B와 중합 가능한 단량체 C로 구성되는 공중합체로서, 아민가가 120mgKOH/g 이상 200mgKOH/g 이하인 분산제; 분자량 10000 이상 20000 이하이고, 또한 산가가 50 mgKOH/ g 이상 150mgKOH/g 이하인 에폭시(메타)아크릴레이트 수지를 병용한다. 유채색 안료의 경우에는 또한 퀴노프탈론 골격에 설폰산기를 갖는 안료 유도체를 병용한다.