| 摘要 |
PURPOSE:To obtain an optical information medium having excellent workability, stability and agglomeration resistance by containing specific colorant in an information recording layer. CONSTITUTION:An information recording layer formed on a substrate contains silicon phthalonaphthalocyanine colorant represented by the formula (1) obtained by forming phthalonaphthalocyanine ring by mixing 1,3-diiminoisoindoline and 1, 3-diiminobenz(f)isoindoline at 0.01/3.99-3.99/0.01 of molar ratio. In the formula (1), (PNPc) represents phthalonaphthalocyanine ring in which silicon is of central metal, R1 and R2 are alkyl, alkenyl and acyl group having a 1-32C normal chain, branch chain or cyclic structure, or aryl group having 6-20C or trialkyl substituted silyl group having total 3-96C. |
