Abstract: An optical recording material for use in an optical recording layer of an optical recording medium comprising the optical recording layer provided on a substrate, the optical recording material comprising a cyanine compound represented by general formula (I): wherein rings A and B each represent a substituted or unsubstituted benzene or naphthalene ring; X represents O, S, Se, CR3R4 or NY; one of R1 and R2 represents a specific group of formula (II) or (III), with the other representing a C1 to C30 organic group; R3 and R4 each represent a C1 to C30 organic group; Y, Y1, and Y2 each represent a hydrogen atom or a C1 to C30 organic group; Z represents a hydrogen atom, a halogen atom or a cyano group; Anm? represents an m-valent anion; m represents an integer of 1 or 2; and p represents a coefficient maintaining charge neutrality.

Abstract: Disclosed is a cyanine compound represented by general formula (I) below. Also disclosed are an optical filter using the compound and an optical recording material.

Abstract: An indolium compound is represented by formula (I): Ring A: a benzene or naphthalene ring. Ring B: 5- or 6-membered heterocyclic or aromatic ring. Z: alkyl group having 1-8 carbon atoms, may be substituted with a halogen atom or interrupted by —O—, —CO—, —OCO—, or —COO—, a sulfonyl group having a hydrocarbyl group having -8 carbon atoms, a sulfinyl group having a hydrocarbyl group having 1-8 carbon atoms, an alkylamino group having an alkyl group having 1-8 carbon atoms, a dialkylamino group having alkyl groups having 1-8 carbon atoms, a cyano group, a nitro group, a hydroxyl group, or a halogen group. R1: group represented by formula (II) or (II?). R2: organic group having 1-30 carbon atoms or group represented by formula (II), (II?), or (III). Y: group represented by formula (III). n: integer 0-4; Anm?: m-valent anion, m is 1 or 2.

Abstract: An optical recording material containing a compound of formula (I): wherein R1 and R2 each represent hydrogen, hydroxyl, halogen, nitro, cyano, a C1-C30 organic group, or a group of formulae (II), (II?) or (III); or R1 and R12 are connected to form a ring; X1 is —CR3R4— or —NH—; Y1 is a C1-C30 organic group or a substituent of formulae (II), (II?) or (III); R3 and R4 each represent hydrogen, a C1-C30 organic group, or a group of formulae (II), (II?) or (III), provided that, when Y1 is a group of formula (III), R3 is hydrogen, a C1-C30 organic group, or a group of formulae (II), (II?) or (III), and when Y1 is a C1-C30 organic group or a group of formulae (II) or (II?), R3 is a group of formulae (II), (II?) or (III); M is Fe, Co, Ni, Ti, Cu, Zn, Zr, Cr, Mo, Os, Mn, Ru, Sn, Pd, Rh, Pt, or Ir; Anq? is a q-valent anion, p is a number necessary to neutralize an electric charge; and q is 1 or 2.

Abstract: An optical recording material comprising at least one kind of chalcone type compound represented by the following general formula (I) or a metal complex using the chalcone type compound as a ligand: wherein ring A represents a 5- or 6-membered heterocyclic ring or an aromatic ring; ring B represents a 5- or 6-membered heterocyclic ring, an aromatic ring, or a metallocene structure; the above-mentioned heterocyclic and aromatic ring may be condensed with other rings or may be substituted; n is 0 or 1.

Abstract: A cyanine compound represented by formula (I): wherein ring A and ring B each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted naphthalene ring; R1, R2, R3, and R4 each represent an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted benzyl group, or R1 and R2 are taken together, or R3 and R4 are taken together, to form a 3- to 6-membered ring, provided that at least one of R1, R2, R3, and R4 is a substituted benzyl group; Y1 and Y2 each represent an organic group having 1 to 30 carbon atoms; Anm? represents an m-valent anion; m represents an integer 1 or 2; and p represents a coefficient for maintaining overall charge neutrality.

Abstract: Recording and reproducing characteristics and data saving reliability are secured in a write-once two-layer recording medium. A second recording layer from a side irradiated with light for recording and reproduction includes organic dye shown by a general formula of a chemical formula 3 described below (in the formula, R1 and R2 are alkyl groups of carbon number 1 to 4; Y1, Y2 respectively are organic groups independently; and X is ClO4, BF4, PF6, SbF6), and organic dye shown by a general formula of a chemical formula 4 described below (in the formula, R1, R4 are alkyl groups of carbon number 1 to 4; R2, R3 are alkyl groups of carbon number 1 to 4 or groups forming 3 to 6 membered rings by being coupled; Y1, Y2 respectively are organic groups independently; and X is ClO4, BF4, PF6, SbF6), to secure durability.

Abstract: An optical recording material comprising at least one kind of a cyanine compound represented by the following general formula (I): wherein ring A and ring B each independently represent a benzene ring or a naphthalene ring which may have a substituent; R1 represents a group represented by the general formula (II), (II?) or (II?); R2, R3 and R4 each independently represent a hydrogen atom, an organic group having 1 to 30 carbon atoms, or a group represented by the general formula (II), (II?) or (II?); R3 and R4 may be linked together to form a ring structure; Y1 and Y2 each independently represent an organic group having 1 to 30 carbon atoms or a group represented by the general formula (III); X represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group which may have a substituent, a benzyl group which may have a substituent, or a cyano group; Anm- represents an m-valent anion; m is 1 or 2; and p represents a coefficient keeping the charge neutral.

Abstract: The present invention relates a biodegradable resin composition comprising an L-lactic acid unit-containing resin (1) and a D-lactic acid unit-containing resin (2). Also disclosed is a biodegradable resin molded article obtained from the biodegradable resin composition.

Abstract: A cyanine compound is represented by formula (I): A1: benzene or naphthalene ring. A3: 5- or 6-membered ring. R1, R2: hydrogen atom and the like. R7: an alkyl group and the like. R12: a substituent by formula (II) or (II?). R20: a hydrogen atom and the like. Anq-: a q-valent anion. q: 1 or 2; p: a coefficient for neutral charge. In formula (II): bond between L and T is a double, conjugated double, or triple bond. L: carbon atom. T: carbon, oxygen, sulfur, or nitrogen atom. x, y, z: 0 or 1. s: 0-4. R13: hydrogen atom and the like. R14, R15, and R16: hydrogen atom and the like. In formula (II?), the bond between L? and T? is a double or conjugated double bond. L?: carbon atom. T?: carbon, oxygen, nitrogen atom. s?: 0-4. Ring containing L? and T?: 5-membered ring, may contain a heteroatom.

Abstract: An optical recording medium containing a cyanine dyes of formula: Where at least one pair of R1 & R2 and R3 & R4 are benzyl moieties, rings A and B are each a benzene or naphthalene ring, Y1 and Y2 are C 1-30 organic groups and Anm? is an m valent anion, present in an integer p.

Abstract: By using a copolymer of a composing unit (A) having a hydrophilic polar group in the molecule with a composing unit (B) having high compatibility with poly-L-lactic acid as a crystallization accelerator, crystallization of poly-L-lactic acid is accelerated and its heat resistance is improved.

Abstract: The cyanine compound of the present invention is represented by general formula (I) below and suitable as an optical recording material used in a recording layer of optical recording media on which recording and play-back are conducted with laser beam. The cyanine compound of the present invention particularly exhibits appropriate thermal decomposition behavior to attain sensitivity compatible with high-speed recording.

Abstract: An optical recording material for use in an optical recording layer of an optical recording medium comprising the optical recording layer provided on a substrate, the optical recording material comprising a cyanine compound represented by general formula (I): wherein rings A and B each represent a substituted or unsubstituted benzene or naphthalene ring; X represents O, S, Se, CR3R4 or NY; one of R1 and R2 represents a specific group of formula (II) or (III), with the other representing a C1 to C30 organic group; R3 and R4 each represent a C1 to C30 organic group; Y, Y1, and Y2 each represent a hydrogen atom or a C1 to C30 organic group; Z represents a hydrogen atom, a halogen atom or a cyano group; Anm? represents an m-valent anion; m represents an integer of 1 or 2; and p represents a coefficient maintaining charge neutrality.

Abstract: An optical recording medium comprises a transmission substrate and a recording layer formed on the transmission substrate, the recording layer containing at least a dye material expressed by a general formula shown at the following chemical formula (in the chemical formula 1, R1 represents alkyl group having carbon numbers 1 to 4, R2, R3 represent alkyl group having carbon numbers 1 to 4, benzyl group or groups combined to form 3 to 6 rings, Y1 and Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6) and a dye material expressed by a general formula represented by the following chemical formula 2(in the chemical formula 2, R1 and R2 represent alkyl groups having carbon numbers 1 to 4, benzyl groups or groups combined to form 3 to 6 rings, Y1, Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6): In a write once type optical recording medium such as DVD?R and DVD+R, satisfactory recording characteristics can be obtained from low-speed recording to high-

Abstract: Indolium compounds of formula (I) exhibit thermal decomposition behavior suitable for optical recording materials used in an optical recording layer of an optical recording medium for high-speed recording.

Abstract: Cyanine compounds represented by the general formula (I) which exhibit decomposition behavior suitable for the optical recording material to be used in optical recording layers of optical recording media for high-speed recording: (I) wherein A and B are each an optionally substituted benzene or naphthalene ring; X is O, S, Se, CR3R4, or NY; at least either of R1 and R2 is a group represented by the general formula (II) or (III) and when only either is a group represented thereby, the other is an organic group having 1 to 30 carbon atoms; R3 and R4 are each an organic group having 1 to 30 carbon atoms; Y is hydrogen or an organic group having 1 to 30 carbon atoms; at least either of Y1 and Y2 is a group represented by the general formula (IV) and when only either is a group represented thereby, the other is hydrogen or an organic group having 1 to 30 carbon atoms; Z is hydrogen, halogeno, or cyano; Anm? is an m-valent anion; m is an integer of 1 or 2; and p is a coefficient capable of keeping the electric char

Abstract: The present invention provides a resin composition comprising poly(L-lactic acid), a crystallization accelerator, a flexibility-imparting agent, and a compatibilizing agent.

Abstract: The present invention provides a compatibilizing agent which is a block copolymer of ingredient A comprising poly(D-lactic acid) or a D-lactic acid/starch copolymer resin and ingredient B comprising a biodegradable resin having a melting point or softening point not higher than the melting point or softening point of poly(lactic acid).

Abstract: A novel cyanine compound of general formula (I) showing thermal behaviors suitable for optical recording applications, an optical recording material containing the same, and an optical recording material containing the same. wherein ring A and B each represent a benzene or naphthalene ring that may be substituted; at least one of the pair of adjacent groups R1 and R2 and the pair of adjacent groups R3 and R4 represent a pair of benzyl groups, and the other paired groups each represent an alkyl group having 1 to 4 carbon atoms or are connected to each other to form a 3- to 6-membered ring; Y1 and Y2 each represent an organic group having 1 to 30 carbon atoms; Anm? represents an m-valent anion; m represents an integer 1 or 2; and p represents a coefficient for maintaing the charge neutrality.