摘要:
An aqueous organic pigment dispersion contains a green copper phthalocyanine pigment and an azo-coupled β-ketoamide pigment. It also includes an organic pigment dispersant at 40 weight % to 100 weight %, based on the sum of the weights of the organic pigments. This aqueous organic pigment dispersion can be combined with a humectant to provide an aqueous green inkjet ink composition. The weight ratio of the green copper phthalocyanine pigment to the azo-coupled β-ketoamide pigment is from 1:1 to 10:1. The median particle diameter of each of the green copper phthalocyanine pigment and the azo-coupled β-ketoamide pigment is less than 85 nm. At least 95% of the total particles of each of the green copper phthalocyanine pigment and the azo-coupled β-ketoamide pigment have a particle diameter of less than 150 nm. The aqueous green inkjet ink compositions can be used in various inkjet printing methods.
摘要:
Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.
摘要:
The problem addressed by the present invention is to provide; solid solution pigment nanoparticles having a homogeneous solid solution ratio; a method for producing solid solution pigment nanoparticles having a homogeneous solid solution ratio in each primary particle; and a method for controlling the solid solution ratio of solid solution pigment nanoparticles. The solid solution pigment nanoparticles are prepared by precipitating at least two types of pigment by mixing a pigment precipitation solvent and; at least one type of pigment solution wherein at least two types of pigment are dissolved in a solvent: or at least two types of pigment solution wherein at least one type of pigment is dissolved in a solvent. The solid solution pigment nanoparticles are wherein the solid solution ratio of the at least two types of pigment in the primary particles of the precipitated solid solution pigment nanoparticles with respect to the ratio of the at least two types of pigment in the pigment solution mixed with the pigment precipitation solvent having a precision within 25%.
摘要:
Provided is a method of producing an electrophotographic photosensitive member having improved sensitivity and capable of outputting an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The method of producing a gallium phthalocyanine crystal includes subjecting a gallium phthalocyanine and a specific amine compound, which are added to a solvent, to a milling treatment to perform crystal transformation of the gallium phthalocyanine. In addition, the gallium phthalocyanine crystal is used in the photosensitive layer of the electrophotographic photosensitive member.
摘要:
A pigment dispersed liquid prepared by heat-treating an aqueous pigment dispersion containing a self-dispersing pigment, but not a dispersing resin.
摘要:
The present invention relates to a method of preparing a modified colored pigment comprising a pigment having attached at least one organic group. The method comprises the step of combining, in any order, a) a solution of an organic colorant in a solvent, b) at least one aromatic amine comprising the organic group, c) at least one diazotizing agent, d) an aqueous medium, e) optionally at least one acid, and f), optionally at least one second solvent, to form the modified colored pigment.
摘要:
A method of producing a phthalocyanine pigment nano-sized particle dispersion, containing: mixing a phthalocyanine compound solution of a phthalocyanine compound dissolved in an acid or a good solvent containing an acid, with an organic solvent that is a poor solvent with respect to the phthalocyanine compound, to prepare a mixed liquid in which a phthalocyanine compound crystal is formed, wherein a phthalocyanine compound crystal having one crystalline form selected from the group consisting of α, β, γ, ε, δ, π, ρ, A, B, X, Y, and R is added to the organic poor solvent or the mixed liquid, thereby producing the thus-formed phthalocyanine compound crystal having the same crystalline form as that of the added phthalocyanine compound crystal, and wherein an additive having a mass average molecular weight of 1,000 or more is incorporated therein.
摘要:
The invention relates to aqueous pigment preparations containing: (A) at least one organic and/or inorganic pigment, (B) at least one polyethylene glycol alkyl ether functionalised by a terminal acid group, (C) at least one alkoxylated styrol-phenol condensate, (D) at least one polyethylene glycol ether having an average molar mass of between 200 and 1000 g/mol, (E) at least one alkine diol, (F) fats and oils of plant and/or animal origin and/or saturated and unsaturated higher fatty acids of such fats and oils and/or salts of such saturated and unsaturated higher fatty acids, (G) optionally an aqueous acrylate resin solution, (H) optionally a polymer condensation product of aromatic sulfonic acids and formaldehyde and/or salts of aromatic sulfonic acids and formaldehyde, (I) optionally one sulfonsuccinic acid half-ester of a castor oil alkoxylate, (J) optionally a hydrotropic substance, (K) optionally other standard additives for aqueous pigment preparations, and (L) water.
摘要:
The present invention relates to a modified colorant comprising a colorant having attached at least one organic group. Various embodiments of the organic group are disclosed. For each of these embodiments, preferably the organic group has a defined calcium index value. Also disclosed are various uses for these modified colorants, including inkjet ink compositions.
摘要:
A colored composition is disclosed that includes a pigment carrier, formed from a transparent resin, its precursor or a mixture thereof, and a halogenated phthalocyanine pigment that has been treated with a higher fatty acid. If required, this colored composition may also include a dye derivative with a basic group, and/or a dye derivative with an acidic group or a salt thereof.