Process for dyeing or printing of fibre material from natural or synthetic polyamides with reactive disazo dyes
AssigneeCiba-Geigy Corporation
InventorsDieter Mausezahl, Peter Loew
Life of this patent
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Abstract
The invention relates to a process for dyeing or printing natural or synthetic polyamide fiber materials which comprises dyeing or printing these fiber materials with reactive dyes of the formula ##STR1## where each M is a cation, R.sub.1 and R.sub.2 are independently of each other hydrogen or C.sub.1 -alkyl, and X.sub.1 and X.sub.2 are independently of each other .alpha.,.beta.-dibromopropionyl, .alpha.-bromoacryloyl, chloroacetyl or a mono-, di- or trihalopyrimidinyl radical.
Claims15
A process for dyeing or printing wool or synthetic polyamide fibre materials with sulfo-containing reactive dyes, which comprises dyeing or printing these fibre materials with reactive dyes of the formula ##STR64## where each M is a cation, R.sub.1 and R.sub.2 are independently of each other hydrogen or C.sub.1 -C.sub.4 alkyl, and X.sub.1 and X.sub.2 are independently of each other .alpha.,.beta.-dibromopropionyl, .alpha.-bromoacryloyl, chloroacetyl or a mono-, di- or trihalopyrimidinyl radical wherein said dyeing process is carried out at a pH between 4 and 6 and at a temperature between 80.degree. and 110.degree. C., and subsequently the pH of the dyebath is made alkaline.
Dependencies are inferred from the claim text.