Abstract: Disclosed is a process for preparing a diazopyridone compound either (A) of the formula or (B) of the formula which comprises diazotizing a dianiline and coupling it with a pyridone or diazotizing an aniline and coupling it with a dipyridone.

Abstract: Disclosed is a process for preparing a colorant of the formula wherein M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M, which comprises (a) reacting 3-n-pentadecylphenol with 4-nitrophthalonitrile in the presence of a base to form an alkylarylether adduct of phthalonitrile; and (b) reacting the alkylarylether adduct of phthalonitrile with either (i) a metal compound, or (ii) an ammonia-releasing compound in the presence of an alkanolamine solvent, or (iii) mixtures of (i) and (ii), to form the colorant.

Abstract: Disclosed are compounds of the formula wherein M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M.

Abstract: An ink composition comprised of a colorant, potassium iodide, and a poly(quaternary amine), and which ink possesses a pH of from about 7.5 to about 12.

Abstract: An ink composition comprised of (1) a vehicle, (2) a mixture of colorants, and (3) a polyquaternary ammonium salt.

Abstract: An ink composition including: an aqueous liquid vehicle, a colorant, and an amino bisphosphonate dispersant compound.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said photogenerating layer is comprised of a mixture of a hydroxygallium phthalocyanine and a tetrafluoro hydroxygallium phthalocyanine.

Abstract: An ink composition comprised of a colorant and poly(diallyl diethyl ammonium) bromide.

Abstract: An aqueous ink composition comprised of (1) a quaternary compound selected from the group consisting of (a) imidazolinium quaternary salts, (b) phosphonium quaternary salts, and (c) an ammonium quaternary salt; (2) a liquid ink vehicle; (3) a paper-curl reducing compound; (4) a lightfastness component; (5) a lightfastness antioxidant; (6) a substantially water soluble organic salt or a substantially water soluble inorganic salt; (7) a biocide; and (8) a colorant.

Abstract: An ink composition containing a mixture of two black colorants, a vehicle, betaine, and N,N'-bis(3-aminopropyl)ethylenediamine.

Abstract: An ink composition comprised of a vehicle, colorant, and associated with said colorant a primary amine, a secondary amine, or a tertiary amine.

Abstract: Disclosed is an ink composition which comprises an aqueous liquid vehicle, a colorant, and an additive material selected from the group consisting of (a) symmetric acetylenic bisester alcohols, (b) symmetric acetylenic bisalkyl alcohols and acetylenic bisalkoxy alcohols, (c) symmetric acetylenic bisamido alcohols, (d) symmetric bisamido alcohols, (e) mono amido alcohols, (f) trialkylhydroxy compounds, (g) derivatives of 1,2-diols and 1,3-diols, (h) thio diols, (i) aromatic diols, (j) heterocyclic diols, (k) imino alcohols, (l) salts of hydroxyl compounds, (m) saccharides and saccharide derivatives, and (n) mixtures thereof. Also disclosed is an ink jet process which comprises (1) incorporating into a thermal ink jet printing apparatus the aforementioned ink composition; and (2) causing droplets of the ink to be ejected from the printing apparatus in an imagewise pattern onto a substrate, thereby generating images on the substrate.

Abstract: A process for the preparation of hydroxygallium phthalocyanines which comprises hydrolyzing a gallium phthalocyanine precursor pigment by dissolving said hydroxygallium phthalocyanine in a strong acid and then reprecipitating the resulting dissolved pigment in basic aqueous media; removing any ionic species formed by washing with water, concentrating the resulting aqueous slurry comprised of water and hydroxygallium phthalocyanine to a wet cake; removing water from said slurry by azeotropic distillation with an organic solvent, and subjecting said resulting pigment slurry to mixing with the addition of a second solvent to cause the formation of said hydroxygallium phthalocyanine polymorphs.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said photogenerating layer is comprised of a tetrafluoro hydroxygallium phthalocyanine.

Abstract: A process for the preparation of Type V hydroxygallium phthalocyanine which comprises the in situ formation of an alkoxy-bridged gallium phthalocyanine dimer, hydrolyzing said alkoxy-bridged gallium phthalocyanine dimer to hydroxygallium phthalocyanine, and subsequently converting the hydroxygallium phthalocyanine product obtained to Type V hydroxygallium phthalocyanine.

Abstract: A process for the preparation of hydroxygallium phthalocyanines which comprises hydrolyzing a gallium phthalocyanine precursor pigment by dissolving said hydroxygallium phthalocyanine in a strong acid and then reprecipitating the resulting dissolved pigment in basic aqueous media; removing any ionic species formed by washing with water, concentrating the resulting aqueous slurry comprised of water and hydroxygallium phthalocyanine to a wet cake; removing water from said slurry by azeotropic distillation with an organic solvent, and subjecting said resulting pigment slurry to mixing with the addition of a second solvent to cause the formation of said hydroxygallium phthalocyanine polymorphs.

Abstract: A process for the preparation of hydroxygallium phthalocyanine which comprises hydrolysis of halogallium phthalocyanine precursor to a hydroxygallium phthalocyanine, and conversion of said resulting hydroxygallium phthalocyanine to Type V hydroxygallium phthalocyanine by contacting said resulting hydroxygallium phthalocyanine with an organic solvent; and wherein said precursor halogallium phthalocyanine is obtained by the reaction of gallium halide with diiminoisoindolene in an organic solvent.

Abstract: A process for the preparation of hydroxygallium phthalocyanine and elements containing same which comprises the synthesis of a precursor halogallium phthalocyanine by the reaction of a diiminoisoindolene with gallium acetylacetonate; hydrolysis thereof to hydroxygallium phthalocyanine; and conversion of the resulting hydroxygallium phthalocyanine obtained to Type V hydroxygallium phthalocyanine by contacting said resulting hydroxygallium phthalocyanine with an organic solvent.

Abstract: Ink jet inks and liquid developers are disclosed which contain colored particles comprising hydrophilic silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents. The ink jet inks generally comprise a liquid medium and a plurality of the colored silica particles. The liquid developers generally comprise a liquid medium, a resin, a plurality of the colored silica particles, and a charge control agent. The particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent attached to the silica particles.

Abstract: A process for the preparation of titanyl phthalocyanine Type 1a which comprises admixing Type I titanyl phthalocyanine with a component that enables dissolution thereof; adding the resulting dissolved titanyl phthalocyanine pigment to a solvent mixture thereby enabling reprecipitation of said pigment; and subsequently contacting the Type X titanyl phthalocyanine formed with hot halobenzene.