Effects of additives on the dyeing of polyamide fibres. Part II: Methyl-β-cyclodextrin

A series of 8 dyes was prepared and used to dye nylon 6 and nylon 6,6. The interactions between dyes and methyl-β-cyclodextrin were studied by solubility isotherms, TGA and DTA analysis.Methyl-β-cyclodextrin was examined as low environmental impact additive in dyeing processes. Methyl-β-cyclodextrin showed good levelling properties on the dyeing of polyamide fibres. This effect can be due to the formation of complexes between methyl-β-cyclodextrin and dyes.