COLORED LIQUID AND COLORED COMPOSITION IN SEPARATED LIQUID STATE

• Main Authors: HOSAKA MASAKI, KITADE MAIKO
• Format: Patent
• Language: English
• Published: 05.06.2014
• Subjects: 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; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a colored composition in a separated liquid state which is rapidly separated after mixing without forming an unclear interface or generating aggregates or the like on an interface.SOLUTION: A colored liquid is provided to be used for an optical modulation type device that modulates a color or brightness by moving or deforming a liquid by an external electric field. The colored liquid comprises a nonpolar solvent and a colorant, in which the colorant is a modified pigment including the following polymer (P) on a surface of a pigment (A). The polymer is obtained by polymerizing a resin (B) having a polar group, an alkyl group having 4 or more carbon atoms, and a siloxane bond with at least one kind of polymerizable unsaturated monomer (C) that is soluble in a non-aqueous solvent and changed into insoluble or hardly soluble after polymerization. The colored composition in a separated liquid state comprises the above colored liquid and a polar solvent that is immiscible with the colored liquid.