Containing the benzene dithiol copper complex optical stabilization medicine and the said stabilization medicine, the optical recording media which becomes, the ink constituent and resin constituent

摘要

PROBLEM TO BE SOLVED: To provide a novel photostabilizer that comprises a specific benzenedithiol copper complex and is useful for production of optical recording medium excellent in light fastness, record storability, persistence and sensitivity and a recording ink excellent in persistence and record storability and a resin excellent in persistence and ultraviolet absorption. SOLUTION: This novel compound is a complex (A) represented by formula I X1 -X6 , one or more of them are a group of the formula: -COOR1 (R1 is H, a (substituted) alkyl), a group of the formula: -CONR2 R3 [R2 and R3 are H, a (substituted) alkyl] or the adjacent two link to each other to form a group of the formula: -CONR8 CO- (R8 is R2 ) and the others are each H, a halogen; A+ is ammonium, phosphonium or the like}, typically copper- tetrabutylammonium complx. The compound of formula I is prepared by allowing a compound of formula II and a compound of formula III to react with a copper salt that can feed copper ion to form the copper complex, followed by allowing a compound feeding a prescribed cation to react with the complex.