Optical recording materials, optical recording materials solution, optical recording medium and method for manufacuturing same

Abstract

The present invention relates to an optical recording material containing a cation represented by the following general formula (1) and a chelate compound of an azo compound and a metal. In the formula, R1 to R4 independently represent an alkyl group with 1 to 4 carbon atoms or a benzyl group that may have a substituent, R5 and R6 independently represent an alkyl group that may have a substituent, R7 represents a hydrogen atom, and Q1 and Q2 each independently represent a group of atoms constituting an aromatic ring which may have a substituent. At least one of R1 to R4 is an optionally substituted benzyl group, and at least one of R5 and R6 has 5 or more carbon atoms.

Description

technical field [0001] The present invention relates to an optical recording material, an optical recording material solution, an optical recording medium and a manufacturing method thereof. Background technique [0002] An optical recording medium is usually manufactured through the steps of applying an optical recording material solution in which a dye-containing optical recording material is dissolved in a solvent on a substrate, and drying the optical recording material solution on the substrate. [0003] In the optical recording medium, since there is a demand for a further increase in recording density, short wavelengths of the recording and reproducing light are being promoted. For example, the current recording and reproducing light wavelength of CD-R is 780nm, but in the next-generation CD-R or DVD-R, the wavelength is shortened to 635-680nm. In order to cope with such short-wavelength light, pigments used in optical recording media include cyanine-based compounds ...

AI Technical Summary

Problems solved by technology

After the optical recording material is dissolved in a solvent and the optical recording material solution is prepared, if the time until the precipitation of crystals occurs is short, the amount of the prepared optical recording material solution will inevitably decrease, and the productivity will decrease.

In addition, it is also difficult to recycle the optical recording material solution

Furthermore, even if only a small amount of crystals are precipitated in the optical recording material solution, tiny defects from the crystals will occur in the obtained optical recording medium, and the yield in the manufacturing process of the optical recording medium will be significantly reduced.

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