Preparation
4-(Naphthaleti-2-ylamino)phenol and a small amount of 4-Nitrophenol and 4-Methylbenzene-1,3-diamine with Sodium polysulfide tert – Butanol solution at 110 ~ 112 ℃ reflux heating 30 hours, and finally as C.I. Sulphur Black 11?(C.I. 53290) – sample, with Sodium nitrite oxidation (BIOS 983130-138). The dye than most sulfur dye has good resistance to chlorine bleaching fastness.
Properties and Applications
blue black. Black powder. Soluble in water. In the Sodium sulfide solution for olive; In the basic insurance powder solution for the grass green.
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Fulling
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Persperation Fastness
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Soaping
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Moderate
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Severe
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ISO
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4-5
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4-5
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6-7
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4-5
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5
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