FLUORINE-BASED OLIGOMER, COMPOSITE COLORING MATERIAL, COLORANT-ASSOCIATED THIN FILM, OPTICAL INFORMATION RECORDING MEDIUM, AND METHOD FOR PRODUCTION THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a new additive which attains the improvement of optical characteristics (refractive index, extinction coefficient and shortening of wavelengths) difficult to solve by designing the molecular structure of colorant, and to provide a composite coloring material therefor and an optical information recording medium using the coloring material.

SOLUTION: The composite coloring material comprises: a fluorine-based oligomer being a fluoroalkyl group-containing oligomer represented by general formula, RF-(M)n-RF' (wherein RFand RF' are each a fluoroalkyl group and may be the same or different; M is a monomer having a hydrophilic group; and n is an integer of ≥1), for example, a fluoroalkyl group-containing oligomer of the formula shown herein; and a colorant having a phenolic hydroxy group. There is also provided an optical information-recording medium using the above material.

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