摘要:
A developer composition having improved stability to aerial oxidation, which contains at least one compound represented by formulae (A) and (B): ##STR1## where R.sub.1 and R.sub.2 each represent a hydroxyl group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonylamino group, a mercapto group or an alkylthio group; and X represents a group of atoms selected from carbon and nitrogen which forms a 5-membered or 6-membered ring together with the two vinyl carbons substituted by R.sub.1 and R.sub.2, respectively, and the carbonyl carbon of formula (A); ##STR2## where R.sub.3 and R.sub.4 each represent a hydroxyl group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonylamino group, a mercapto group or an alkylthio group; and Y represents a group of atoms selected from carbon, nitrogen and oxygen containing at least one ether bond, and Y forms a 6-membered ring together with the two vinyl carbons substituted by R.sub.3 and R.sub.4, respectively, and the carbonyl carbon of formula (B), provided that both R.sub.3 and R.sub.4 are not hydroxyl.
摘要:
An information recording medium is disclosed, comprising a substrate having provided thereon a recording layer capable of recording information by a laser ray, wherein the recording layer contains a dye compound represented by formula (I-1): wherein R1, R2, R3 and R4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted heterocyclic group, L1, L2 and L3 each independently represents a methine group which may have a substituent, m represents 0, 1, 2 or 3, Xk+ represents a cation and k represents an integer of from 1 to 10, provided that when m is 2 or 3, the plurality of L2 and L3 groups may be the same or different. Also disclosed is an information recording method using the above-described information recording medium.
摘要:
An optical information-recording medium which contains a dye having at least two chromophores bonded to each other without any conjugated bond intervening between those chromophores.
摘要:
An information recording medium is disclosed, comprising a substrate having provided thereon a recording layer capable of recording information by a laser ray, wherein the recording layer contains a dye compound represented by formula (I-1): wherein R1, R2, R3 and R4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted heterocyclic group, L1, L2 and L3 each independently represents a methine group which may have a substituent, m represents 0, 1, 2 or 3, Xk+ represents a cation and k represents an integer of from 1 to 10, provided that when m is 2 or 3, the plurality of L2 and L3 groups may be the same or different. Also disclosed is an information recording method using the above-described information recording medium.
摘要:
A process for preparation of an optical compensatory sheet is disclosed. The process comprises the steps in order of: coating a support with a photosensitive compound; exposing the photosensitive compound to beams of linearly polarized light emitted from a semiconductor laser to form an orientation layer; coating the orientation layer with a liquid crystal composition containing polymerizable liquid crystal molecules; aligning the liquid crystal molecules to form an optically anisotropic layer; and then polymerizing the liquid crystal molecules to fix alignment.
摘要:
An optical information-recording medium which contains a dye having at least two chromophores bonded to each other without any conjugated bond intervening between those chromophores.
摘要:
An optical information-recording medium which contains a dye having at least two chromophores bonded to each other without any conjugated bond intervening between those chromophores.
摘要:
A positive-type photosensitive composition that has high sensitivity, good latitude in development, and good storage stability and is for use in a direct plate production process using an infrared laser and a novel anionic infrared-ray absorbing agent suitable therefor. This composition comprises (a) an anionic, infrared-ray absorbing agent represented by general formula (I) and (b) a polymeric compound that is insoluble in water but soluble in an aqueous alkaline solution so that the composition becomes soluble in the aqueous alkaline solution when irradiated with the infrared laser. In the general formula (I) given below, M represents a conjugated chain, Ga− represents an anionic substituent group, Gb represents a neutral substituent group, and Xm+ represents a cation including a portion, the cation having a valence of from 1 to m, wherein m represents an integer ranging from 1 to 6. {Ga−—M—Gb}m Xm+ (I)