Dye-fiber bond stabilities of the reactive dyed silk

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  • 反応染色絹の染料‐繊維間結合の安定性
  • ハンノウ センショク キヌ ノ センリョウ センイカン ケツゴウ ノ アンテイ
  • 繊維間結合の安定性

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To clarify the bond stabilities of C. I. Reactive Blue 19 (mono-functional reactive dye of sulfatoethylsulfon type) with silk, the decomposition behaviors of the dyed silk and the dye-amino acid (glycine and γ-amino-n-butyric acid as the model compound for silk) were examined. The following results were obtained:<br>1) The rate of the decomposittion of the dye-glycine was increased as the temperature became higher. This compound was very stable in weakly acidic solution, but degraded rapidly in alkaline solution.<br>2) The dye-γ-amino-n-butyric acid was more stable at 100°C in weakly acidic or neutral solutions than in strongly acidic or alkaline solutions. This compound degraded more rapidly than the dye-glycine, especially in acidic region.<br>3) The dyed silk was very stable in the buffer solutions of pH 3-8 at 70°C, and was considerably stable in the buffer solutions of pH 3-7 at 100°C.<br>4) The dyed silk was more stable than the dye-amino acid under the same condition.

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