Abstract: A light detector includes a semiconductor layer and a light-receiving element. The semiconductor layer is of a first conductivity type. The light-receiving element includes a first semiconductor region, a second semiconductor region, a third semiconductor region, and a fourth semiconductor region. The first semiconductor region is of a second conductivity type. The second semiconductor region is located between the first semiconductor region and the semiconductor layer. The second semiconductor region is of the first conductivity type and contacts the first semiconductor region. The third semiconductor region is located between the second semiconductor region and the semiconductor layer. The third semiconductor region is of the second conductivity type. The fourth semiconductor region is located between the third semiconductor region and the semiconductor layer.

Abstract: The present invention provides a method for storing a polycarboxylic acid copolymer solution capable of preventing or reducing cloudiness and an increase in viscosity of a polycarboxylic acid copolymer solution after storage. The present invention relates to the method for storing a solution of a polycarboxylic acid polymer, the polycarboxylic acid polymer having a weight-average molecular weight of 1,000 to 20,000 and a degree of neutralization of 15 mol % or lower based on 100 mol % of a total of carboxyl groups and salts thereof in the polycarboxylic acid polymer, the polycarboxylic acid polymer containing a structural unit derived from an unsaturated carboxylic acid monomer in a content of 85 to 100 mol % based on 100 mol % of structural units derived from all monomers, the storage method comprising storing at 40° C. or higher.

Abstract: A binder composition comprising a rust inhibitor having a sulfur atom in the molecule, and a carboxyl group-containing polymer.

Abstract: Provided is a binder that has satisfactory storage stability and can express an excellent bonding strength for a glass fiber or powdered glass (impart a satisfactory strength to a bonded body with the glass fiber or the powdered glass).

Abstract: Provided is a binder that has satisfactory storage stability and can express an excellent bonding strength for a glass fiber or powdered glass (impart a satisfactory strength to a bonded body with the glass fiber or the powdered glass). The binder of the present invention includes: a polymer having a hydroxyl group; and an ammonium salt of an inorganic acid, in which: the polymer contains a specific structural unit derived from a monomer represented by the general formula (1) and a specific structural unit derived from a monomer containing a carboxylic acid (salt) group.

Abstract: Provided is a binder that has satisfactory storage stability and can express an excellent bonding strength for a glass fiber or powdered glass (impart a satisfactory strength to a bonded body with the glass fiber or the powdered glass).

Abstract: Provided is a binder that has satisfactory storage stability and can express an excellent bonding strength for a glass fiber or powdered glass (impart a satisfactory strength to a bonded body with the glass fiber or the powdered glass).

Abstract: The present invention relates to an optical recording medium containing a first substrate, a first information layer, an intermediate layer, a second information layer and a second substrate in this order, wherein the first information layer contains a first recording layer disposed on the first substrate and the second information layer contains a reflective layer, a second recording layer containing an organic dye and a protective layer which are disposed on the second substrate in this order; and the second recording layer contains an organic dye which is at least one elected from the group consisting of the specified squarylium metal chelate compounds.

Abstract: The present invention provides a filter for electronic display devices, comprising a squarylium compound represented by General Formula (I): [wherein X represents a group represented by following Formula (A): (wherein R1, R2, R3, and R4 may be the same or different and each represents a hydrogen atom, a halogen atom and the like; and R5 and R6 may be the same or different and each represent a hydrogen atom, an alkyl group optionally having substituent(s) and the like) and the like; and Y represents a group represented by following Formula (C): (wherein R9 represents a halogen atom, an alkyl group optionally having substituent(s) and the like; and R10 represents a hydrogen atom, an alkyl group optionally having substituent(s) and the like) and the like, and “n” represents an integer of 0 to 5].

Abstract: The present invention provides an optical recording medium including a substrate and a recording layer on the substrate having a squarylium metal chelate compound with a central metal. The recording layer includes a mixture of squarylium metal chelate compounds having ligands of the same type as well as metals of two or more types as the central metal. It is preferable that the recording layer includes a squarylium metal chelate compound having a bivalent metal as its central metal and a squarylium metal chelate compound having a metal other than a bivalent metal as its central metal.

Abstract: The present invention provides a filter for electronic display devices, comprising a squarylium compound represented by General Formula (I): [wherein R1 and R2 may be the same or different and each represents a hydrogen atom, an alkyl group optionally having substituent(s), an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s); X represents a group represented by following Formula (A): (wherein R3 and R4 may be the same or different and represents a hydrogen atom, an alkyl group optionally having substituent(s), an alkoxy group optionally having substituent(s), an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s), wherein R3 and R4 may be combined together with the adjacent nitrogen atom thereto form a heterocyclic group optionally having substituent(s))].

Abstract: The present invention provides a process for producing a compound having a group represented by general formula (II): (wherein R1, R2, and R3 may be the same or different, and each represent a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl, or a substituted or unsubstituted aralkyl, or R1 and R2 may bind to each other to form an alicyclic hydrocarbon ring together with the adjacent carbon atoms, or R2 and R3 may bind to each other to form a alicyclic heterocyclic ring together with the adjacent O—C—C that may have a substituent), which comprises allowing a compound having a hydroxyl group to react with halogenated alkyl ether represented by general formula (I): (wherein R1, R2, and R3 are the same as those defined above, respectively and X represents a halogen atom).

Abstract: The present invention relates to an optical recording medium containing a first substrate, a first information layer, an intermediate layer, a second information layer and a second substrate in this order, wherein the first information layer contains a first recording layer disposed on the first substrate and the second information layer contains a reflective layer, a second recording layer containing an organic dye and a protective layer which are disposed on the second substrate in this order; and the second recording layer contains an organic dye which is at least one elected from the group consisting of the specified squarylium metal chelate compounds.

Abstract: The present invention provides oils for cosmetics comprising a dibasic acid diester represented by general formula (I) (wherein R1, R2, R3 and R4, which are the same or different, each represent lower alkyl) and excellent in solubility of a long-wave ultraviolet light absorber or the like, and so forth.

Abstract: The invention provides a photopolymerizable composition having a high photosensitivity, which comprises a metal complex of a squarylium compound, a radical generator, and a compound having at least one ethylenically unsaturated double bond. The photopolymerizable composition of the present invention is advantageously used for a visible laser recording material such as a PS (Presensitized Plate) for laser direct plate-making, a dry film resist, a digital proof, a hologram, or the like, a panchromatic sensitive material (e.g., a sensitive material for a color hologram and a sensitive material used for full-color display and containing a photopolymerizable composition in a microcapsule), paints, adhesives, and so on.

Abstract: The present invention provides the following process for production of an ether compound, which is useful for chemical amplification type resist compositions, synthetic intermediates of pharmaceuticals, paints, or the like, with less side reaction and in high yield. A process for producing an ether compound having a group represented by the general formula (II) wherein R1, R2 and R3 may be the same or different, and represent substituted or unsubstituted alkyl, substituted or unsubstituted aryl or substituted or unsubstituted aralkyl, or R1 and R2 form cycloalkyl together with an adjacent carbon atom, which comprises allowing a compound having a hydroxyl group (including a carboxyl group) to react with an alkenyl ether represented by the general formula (I) wherein R1, R2 and R3 have the same significances as defined above, respectively.

Abstract: The present invention provides a visible light-sensitive composition which is highly sensitive to a visible light and is useful as an electronic circuit forming material, a lithographic printing material, etc., said visible light-sensitive composition comprising (a) a polymer comprising a repeating unit represented by general formula (I): wherein R1, R2, and R3 are the same or different and each represents substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl, or alternatively R1 and R2 form cycloalkyl together with the adjacent carbon atom, and R4 represents lower alkyl, (b) a compound that generates an acid by visible light irradiation and (c) a sensitizing dye.

Abstract: The present invention provides a filter for electronic display devices, comprising a squarylium compound represented by General Formula (I): [wherein R1 and R2 may be the same or different and each represents a hydrogen atom, an alkyl group optionally having substituent(s), an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s); X represents a group represented by following Formula (A): (wherein R3 and R4 may be the same or different and represents a hydrogen atom, an alkyl group optionally having substituent(s), an alkoxy group optionally having substituent(s), an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), or a heterocyclic group optionally having substituent(s), wherein R3 and R4 may be combined together with the adjacent nitrogen atom thereto form a heterocyclic group optionally having substituent(s))].

Abstract: A filter of an electronic display device provides a clear image, the filter comprising an squarylium compound represent by formula (II): wherein R15 and R17 independently represent a hydrogen atom, a halogen atom, substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a nitro group, a cyano group, a hydroxyl group, a substituted or unsubstituted amino group, or a substituted or unsubstituted heterocyclic group; R16 and R18 independently represent an alkoxyalkoxyl-substituted alkyl group; R19 and R20 independently represent a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a nitro group, a cyano group, a hydroxyl group, a substituted or unsubstituted amino group, or a substituted or unsubstituted heterocyclic group; m represents an integer of

Abstract: Squarylium-metal chelate compounds as recording materials for optical recording media, and optical recording media using these compounds, which have excellent recording properties, light resistance and storage stability. The squarylium-metal chelate compound is represented by following Structural Formulas (1) and (2): In the formula (1), M represents a metal atom capable of coordinating; “a”, “b” and “c” each represents a squarylium dye ligand of formula (2), where “a” is different from “b”; and “c” may be the same as or different from “a” or “b”; and “m” represents 0 or 1. In the formula (2), R1 and R2 are the same or different and each represents an alkyl group, aralkyl group, aryl group or heterocyclic group, each of which may be substituted; and X represents an aryl group which may be substituted, a heterocyclic group which may be substituted, or Z3=CH—, wherein Z3 represents a heterocyclic group which may be substituted.