Abstract: Disclosed is a photosensitive resin composition containing a cationic photopolymerization initiator (A) and an epoxy resin (B) having two or more epoxy groups in each molecule, which is characterized in that the cationic photopolymerization initiator (A) is a cationic photopolymerization initiator (A-1) that is represented by formula (1).

Abstract: Disclosed is a photosensitive resin composition containing a cationic photopolymerization initiator (A) and an epoxy resin (B) having two or more epoxy groups in each molecule, which is characterized in that the cationic photopolymerization initiator (A) is a cationic photopolymerization initiator (A-1) that is represented by formula (1).

Abstract: The present invention relates to an aqueous solution composition (water-based ink composition) containing a water-soluble naphthalocyanine coloring matter represented by the following formula (1): wherein, M represents a hydrogen atom, a metal atom, a metal oxide, a metal hydroxide or a metal halide, X represents a carbonyl group or a sulfonyl group, W1 to W4 are each independently a hydrogen atom, an ionic hydrophilic group or the like, at least one of W1 to W4 is a group other than a hydrogen atom, and n represents an integer number of 1 to 24, respectively, or a salt thereof, and a novel naphthalocyanine coloring matter, and said compound is useful as a near-infrared ray absorbent because it has a high absorption in the near-infrared region, and it is useful as a near-infrared ray absorbing water-based ink because it has an excellent storage stability in aqueous solution.

Abstract: The present invention relates to an aqueous solution composition (water-based ink composition) containing a water-soluble naphthalocyanine coloring matter represented by the following formula (1): (wherein, M represents a hydrogen atom, a metal atom, a metal oxide, a metal hydroxide or a metal halide, X represents a carbonyl group or a sulfonyl group, W1 to W4 are each independently a hydrogen atom, an ionic hydrophilic group or the like, at least one of W1 to W4 is a group other than a hydrogen atom, and n represents an integer number of 1 to 24, respectively) or a salt thereof, and a novel naphthalocyanine coloring matter; and said compound is useful as a near-infrared ray absorbent because it has a high absorption in the near-infrared region, and it is useful as an near-infrared ray absorbing water-based ink because it has an excellent storage stability in aqueous solution.

Abstract: The present invention relates to a novel anthrapyridone compound represented by the following formula (1) or a salt thereof and provides a magenta coloring matter having a very vivid hue suitable for inkjet recording, being strong in fastnesses of recorded matters, and having an excellent storage stability: wherein, R1 represents a hydrogen atom, an alkyl group and the like, R2 represents a hydrogen atom or a methoxy group, and R3 represents an alkyl group which may have an aryl group, a heterocycle group, a sulfonic acid group, a carboxy group, an alkoxycarbonyl group, an acyl group, a carbamoyl group, a cyano group, an alkoxy group, a phenoxy group, a hydroxy group, a nitro group and the like on the alkyl group and further may have a substituent on the aryl group and the heterocycle group respectively.

Abstract: The present invention relates to a novel anthrapyridone compound represented by the following formula (1) or a salt thereof and provides a magenta coloring matter having a very vivid hue suitable for inkjet recording, being strong in fastnesses of recorded matters, and having an excellent storage stability: {wherein, R1 represents a hydrogen atom, an alkyl group and the like, R2 represents a hydrogen atom or a methoxy group, and R3 represents an alkyl group (which may have an aryl group, a heterocycle group, a sulfonic acid group, a carboxy group, an alkoxycarbonyl group, an acyl group, a carbamoyl group, a cyano group, an alkoxy group, a phenoxy group, a hydroxy group, a nitro group and the like on the alkyl group and further may have a substituent on the aryl group and the heterocycle group) respectively}

Abstract: A novel aminium compound exhibiting excellent solubility for solvents and high safety in terms of handling and environment is provided. An aminium compound represented by the following formula (1): wherein R1 represents substituted or unsubstituted alkyl and A2− represents a divalent organic anion.

Abstract: An electrophotographic toner containing a specific compound as the charge control agent is described. The electrophotographic toner according to the present invention have a sharper distribution of the amount of electrification and better moisture resistance and time stability than those of a toner wherein a conventional charge control agent is used. Therefore it can provide an image having a very high gradation and has a very high capability of repeatedly forming an image. Since the charge control agent, as such, is essentially colorless, a colorant can freely be selected according to a hue required of a color toner and the toner is not detrimental to the hue inherent in a dye and a pigment.

Abstract: An electrophotographic toner containing a specific compound as the charge control agent is described. The electrophotographic toner according to the present invention have a sharper distribution of charge and better moisture resistance and charge durability than those of a toner wherein a conventional charge control agent is used. Therefore it can provide an image having a very high gradation and has a very high capability of repeatedly forming an image. Since the charge control agent, as such, is essentially colorless, a colorant can freely be selected according to a hue required of a color toner and the toner is not detrimental to the hue inherent in a dye and a pigment. The charge control agent is highly safe to environment.

Abstract: An electrophotographic toner containing a specific compound as the charge control agent is described. The electrophotographic toner according to the present invention have a sharper distribution of the amount of electrification and better moisture resistance and time stability than those of a toner wherein a conventional charge control agent is used. Therefore it can provide an image having a very high gradation and has a very high capability of repeatedly forming an image. Since the charge control agent, as such, is essentially colorless, a colorant can freely be selected according to a hue required of a color toner and the toner is not detrimental to the hue inherent in a dye and a pigment.