Dye material

Abstract

Abstract NEW MATERIAL:Naphthoquinone dyes of formula I , wherein R is alkyl, alkoxyl, amino, substd. amino. USE:The compds. of formula I have absorption bands in the wavelength region of laser beam. The evaporation temp., the decomposition temp. and the melting temp. of the comps. are properly low so that they are stable and gives a film by vapor deposition. They are suitable for use as a long-life recording material using laser beam. PREPARATION:2,3-Dichloro-1,4-naphthoquinone of formulaII is nitrated. The resulting compd. of formula III is reacted with sodium cyanide to obtain a compd. of formula IV, which is then reduced. The resulting compd. of formula Vis reacted with p-n-butylaniline to obtain the naphthoquinone dye of formula I , where R is n-butyl.

Inventors

• 👤 Sotaro Edokoro
• 👤 繪所　壮太郎
• 👤 Masaki Ito
• 👤 雅樹 伊藤
• 👤 Masaru Matsuoka
• 👤 賢 松岡

Bibliographic Details