Method of treating natural or synthetic polyamide fiber materials
AssigneeCiba Specialty Chemicals Corporation
InventorsPhilippe Ouziel, Jean-Marie Adam
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Abstract
A method of improving the stability to ozone exposure of dyes on natural or synthetic polyamide fiber materials comprises treating the fiber material, before, during or after dyeing, with a liquor comprising a homopolymer or copolymer having structural repeating units of formula (1) in which R1 is unsubstituted or substituted C1-C4alkyl. The resulting dyeings and prints feature improved ozone fastness with no effect on hue, colour yield and other fastness properties such as light fastness, for instance.
Claims15
A method of improving the stability to ozone exposure of anthraquinone dyes on natural or synthetic polyamide fibre materials, which comprises treating the fibre material, before, during or after dyeing with anthracuinone dyes, with a liquor comprising a homopolymer or copolymer having structural repeating units of formula (1)
- in which
- R1 is unsubstituted or substituted C1-C4alkyl,
- whereby the ozone stability is improved.
Dependencies are inferred from the claim text.