Konica Corporation

Konica Minolta Business Technologies, Inc.

Konica-Minolta Holdings, Inc.

Koji Daifuku

Kaori Ono

Ryohei Iwamoto

Issei Nakahara

Keiko Ishidai

Kimihiko Ookubo

Hiroshi Kita

Yutaka Kaneko

Satoru Ikesu

Hirokazu Sato

Takatugu Suzuki

Hiroshi Ishidai

Hiroyuki Yasukawa

Kohichi Takabe

A copper complex compound represented by Formula (1) is disclosed. 

Copper complex compound and electrophotographic toner containing the same

An electrophotographic toner is disclosed. The toner contains a compound of Formula X-1 and a copper complex compound represented by the following Formula (1), which are defined detain in the specification. 

Electrophotographic toner

A compound represented by Formula (X-1) is disclosed. in the formula, Rxand Rxeach independently represents an alkyl group, Lx is a hydrogen atom or an alkyl group, Gxis an alkyl group having 2 or more carbon atoms, Gxis an alkyl group or an aromatic hydrocarbon group, Gxis a hydrogen atom, a halogen atom, a Gx-CO&#x2014;NH&#x2014; group or a Gx-N(Gx)-CO&#x2014;group, Gxand Gxeach independently represents a hydrogen atom or a substituent, and Qx, Qx, Qx, Qxand Qxeach independently represents a hydrogen atom or a substituent. An electrophotographic toner containing the compound is also disclosed.

Pyrazolotriazole compound and electrophotographic toner

A copper complex compound represented by Formula (1) is disclosed.  in the formula, groups represented by R is a substituent, n is an integer of from 1 to 5 and the total carbon number contained in (R) n is 14 or more. A toner for electrophotography containing the compound is also disclosed.

An electrophotographic toner which achieves superior coloring without exhibiting any difficulty in dispersibility in thermoplastic resin while exhibiting improved characteristics, is disclosed, comprising a thermoplastic resin and a metal chelate dye contained in the thermoplastic resin and represented by the following formula:M(L)(L)(X)(X).WImage forming method by use of the toner is also disclosed.

Electrophotographic toner and image forming method

A method for producing an electrophotographic toner comprising the steps of: (1) mixing a water-insoluble organic solvent, an oil-soluble dye capable of chelating with a metal, a metal compound and water to form an oil-soluble dye dispersion, (2) removing the organic solvent from the oil-soluble dye dispersion to form colored microscopic particles, and (3) adding an emulsion thermoplastic resin to the colored microscopic particles so as to associate the particles with slow coagulation.

Method for producing electrophotographic toner and electrophotographic toner

A metal complex dye is disclosed, containing a dye as a ligand represented by the following formula (1). A color toner and a color filter containing the metal complex dye are also disclosed. 

Metal complex dye, color toner and color filter

An electrophotographic toner exhibiting superior color reproducibility and transparency and improved characteristics is disclosed, comprising a thermoplastic resin and colored microparticles dispersed in the thermoplastic resin and containing a dye and a resin differing in composition from the thermoplastic resin. An image forming method by use of the toner is also disclosed.

Disclosed is a silver halide color photographic light sensitive material comprising a coupler represented by the following formula (I): formula (I) ##STR1## wherein Cp represents a coupler moiety; L represents a divalent linkage group; J represents --CO-- or --SO.sub.2 --; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent a hydrogen atom, an alkyl group or an aryl group, provided that one of R.sub.3 and R.sub.4 is a hydrogen atom; R.sub.5 represents a substituent; and n represents 0 or 1.

Silver halide color photographic light-sensitive material

A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material has a silver halide emulsion layer which contains oleophilic particles comprising a dye-forming coupler and a water-insoluble monohydric alcohol represented by the following Formula I, II or III; ##STR1## wherein m is an integer of 1 to 20; one of R.sub.11, R.sub.12 and R.sub.13 in number of m is a hydrogen atom and other groups represented by R.sub.11, R.sub.12 and R.sub.13 are each an acyl group; and the total number of carbon atoms contained in the acyl groups represented by R.sub.11, R.sub.12 and R.sub.13 are not less than 8; ##STR2## wherein one of R.sub.21, R.sub.22, R.sub.23 and R.sub.24 is a hydrogen atom and other groups represented by R.sub.21, R.sub.22, R.sub.23 and R.sub.24 are each an acyl group and the total number of carbon atoms contained in the acyl groups represented by R.sub.21, R.sub.22, R.sub.23 and R.sub.24 is not less than 12; ##STR3## wherein one of R.sub.31, R.sub.32, R.sub.33 and R.sub.34 is a hydrogen atom and other groups represented by R.sub.31, R.sub.32, R.sub.33 and R.sub.34 are each an acyl group and the total number of carbon atoms contained in the acyl groups represented by R.sub.31, R.sub.32, R.sub.33 and R.sub.34 is not less than 12.

Silver halide light-sensitive color photographic material

A silver halide color photographic light sensitive material comprising a magenta coupler of Formula is disclosed. ##STR1## In the formula R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each represent a hydrogen atom, an aliphatic group, aromatic group or heterocyclic group, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each are same or different, the aliphatic group and aromatic group each may have a substituent(s); R.sup.6 and R.sup.7 each represent a hydrogen atom or a substituent, wherein R.sup.6 and R.sup.7 each are same or different and may form a dioxane ring, and the dioxane ring may have a substituent (s); X is a hydrogen atom, or a group or atom which is released upon the reaction with the oxidation product of developing agent; Z.sub.1 is a non-metal group to form a 5-membered cycle in combination with a nitrogen atom; the cycle represented by X may have a sustituent(s).

Silver halide color photographic light sensitive material

The improved silver halide color photographic material contains at least one pyrazolotriazole base magenta coupler represented by the following general formula [Ia] or [Ib]: ##STR1## This photographic material is improved in image keeping quality, especially in lightfastness, without lowering the efficiency of color formation and it also insures good color reproduction.

Growing community of inventors

Tokyo, Japan

Koji Daifuku