The present invention relates to [1] a pigment water dispersion containing pigment-containing crosslinked polymer particles, in which a crosslinked polymer in the particles is a polymer that is crosslinked with a crosslinking agent represented by the general formula (1), and [2] a process for producing a pigment water dispersion containing pigment-containing crosslinked polymer particles, including the following steps (1) and (2): Step (1): subjecting a pigment mixture containing a pigment, a water-dispersible polymer and water to dispersion treatment, thereby obtaining an aqueous pigment dispersion solution containing pigment-containing polymer particles; and Step (2): mixing the aqueous pigment dispersion solution obtained in the step (1) and a crosslinking agent represented by the general formula (1) to react the water-dispersible polymer with the crosslinking agent, thereby obtaining a pigment water dispersion containing pigment-containing crosslinked polymer particles.

Provided herein are color charts and water color pigment solutions useful, for example, in the calibration of reflectance-based diagnostic analyzers.

An object of the present invention is to provide a colored photosensitive resin composition capable of forming a color filter having a higher brightness than that of the color filter formed from the conventionally known colored photosensitive resin composition.

The colored photosensitive resin composition according to the present invention comprises a colorant, a resin, a polymerizable compound, and a polymerization initiator, the colorant comprising a compound represented by formula (1) and an α-type and/or β-type copper phthalocyanine pigment,

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wherein M.sup.r+ represents an r-valent metal ion; k represents the sum of the number of —SO.sub.3.sup.− and the number of —SO.sub.2—N.sup.−—SO.sub.2—R.sup.f in the compound represented by formula (1); r represents an integer of 1 or more; R.sup.f represents a fluoroalkyl group having 1 to 12 carbon atoms; and the compound represented by formula (1) has at least one —SO.sub.3.sup.− or —SO.sub.2—N.sup.−—SO.sub.2—R.sup.f.

Novel, nano-structured particles are formed by introducing a selected solid of interest into a structured fluid matrix formed by a dispersion of a small molecule host vessel components, such as a native or modified polysaccharide, cavitand, simple sugar, disaccharide, simple polyol or other similarly structured molecule known to be useful as a host vessel, in an acidic medium or other solvent, whereby the particle size of the introduced solid is reduced and or limited in the structured fluid matrix, by incorporation into or attachment to, the host vessel. The simple, one-batch mixing process results in stabilized colloidal dispersions of the nanoparticles of a variety of solids of varying scope and function and useful in a wide variety of applications, including without limitation ceramic materials, such as hexagonal boron nitride.

A copolymer useful as an ingredient of a colored resin composition, comprising a structural unit derived from an aromatic carboxylic acid having an ethylenically unsaturated bond, a structural unit (Ab) represented by formula (Z), and a structural unit (Ac) derived from an unsaturated compound having a cyclic ether structure having 2 to 4 carbon atoms, wherein L represents a single bond or a divalent linking group, A represents a phenyl group optionally having a substituent other than a carboxy group or a naphthyl group optionally having a substituent other than a carboxy group, R.sup.a represents a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms, and a hydrogen atom contained in the alkyl group is optionally replaced by a hydroxy group.

##STR00001##

Provided is a near-infrared ray absorbing composition containing at least a near-infrared absorber, a metal compound, and a solvent, wherein the near-infrared absorber contains a metal ion, and the metal compound is a compound having a structure represented by the following Formula (I), Formula (II), or Formula (III),

M(OR.sub.1).sub.nFormula (I):

M.sup.n+(OR.sub.2O.sup.).sub.nFormula (II):

(OR.sub.3).sub.n-mM.sup.n+(.sup.OCOR.sub.4).sub.m,Formula (III): in the above Formulas (I), (II), and (III), M represents at least one metal element selected from the group consisting of titanium, zirconia, and aluminum; when M represents titanium or zirconia, n=4, m=1, 2, 3, or 4; when M represents aluminum, n=3, m=1, 2, or 3; R.sub.1 to R.sub.4 each independently represent an alkyl group having 1 to 30 carbon atoms, and R.sub.1 to R.sub.4 may further have a substituent.

Adhesive compositions include a pressure sensitive adhesive, and at least 2 light absorbing components dispersed within the pressure sensitive adhesive. The light absorbing components are dyes, nanopigments or a combination thereof. The light absorbing components absorb light in the wavelength range of 350-700 nanometers. A layer of the adhesive composition transmits no more than 10% of light in the wavelength range of 350-700 nanometers and transmits at least 75% of light in the wavelength range of 900-1200 nanometers.

The present invention relates to a technique for providing a quinacridone solid solution pigment, by which a quinacridone solid solution pigment that allows a colored product to have high chroma and a properly yellowish hue, and suitably, that has a controlled particle diameter and has the above-described, desired hue can be obtained. The present invention provides a method for producing a quinacridone solid solution pigment, wherein a diarylaminoterepththalic acid and a dialkylarylaminoterephthalic acid are subjected to a co-cyclization reaction in polyphosphoric acid, thereby obtaining a water-containing crude quinacridone solid solution such that water is contained in a solid solution having a mass ratio of unsubstituted quinacridone to a 2,9-dialkylquinacridone of 85:15 to 60:40; the water-containing crude quinacridone solid solution obtained above is dried in a drying step, thereby obtaining a powdery, crude quinacridone solid solution having a water content of less than 1%; and the powdery, crude quinacridone solid solution is heated in a liquid medium that does not dissolve the crude quinacridone solid solution in a pigmentation step, and the present invention also provides a pigment dispersion liquid and an inkjet ink each containing the obtained quinacridone solid solution pigment.

Provided is a photosensitive composition including a radically polymerizable compound, a photoradical polymerization initiator, and at least one selected from a chain transfer agent or a radical trapping agent.

Provided are a composition including a compound represented by Formula 1 and having a maximum absorption wavelength in a range of 600 nm or more and less than 750 nm and a polymerizable compound; as well as a cured product of the composition, a color filter including the cured product, a method for producing the color filter, a solid-state imaging element including the color filter, an image display device including the color filter, and a compound.

In Formula 1, Z's each independently represent a specific group, n represents an integer of 4 to 16, and R's each independently represent a hydrogen atom or a monovalent substituent which is different from Z, m represents an integer of 0 to 12, and m+n is 16.

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