| 摘要 |
PURPOSE:To provide red to blue dyes having very good alkaline discharge- printability and excellent fastness to wetting and sublimation and heat resistance, by introducing a long-chain alkyl group or a long-chain alkoxy group into the end group of a coupler. CONSTITUTION:Monoazo dyes for polyesters, of formula I [wherein X is H, Cl, lower alkyl, phenyl; Y is H, CH3, Cl, acetylamino; Z is NO2, a group of formula II(wherein R<2> is CN, a 1-10C alkoxycarbonyl, phenyl, phenylsulfonyl, benzoyl); R is a 6-8C alkyl], such as dyes of formulas III and IV. The dyes can dye polyester fibers red to blue with excellent fastness to light and sublimation in particular, and are excellent in heat resistance and alkaline resist- and discharge- printability.
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