Dyeing assistants and their use in dyeing synthetic fibre material
AssigneeCiba-Geigy Corporation
InventorsHeinz Abel, Karlheinz Keller
Life of this patent
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Abstract
A dyeing assistat containing at least (a) an alkylbenzene or tetrahydronaphthalene (tetralin) or a mixture thereof, (b) an anionic surfactant, (c) a non-aromatic and water-immiscible solvent and optionally also (d) a polar solvent and/or (e) a non-ionic surfactant; this dyeing assistant can be used to promote the migration of the dyes and thus to improve the levelness and dye yield when dyeing synthetic fibre material, preferably polyester, in particular in the temperature range from 80.degree. to 130.degree. C.
Claims32
A dyeing assistant which comprises at least
- (a) an alkylbenzene or tetrahydronaphthalene or a mixture thereof,
- (b) an anionic surfactant and
- (c) a non-aromatic and water-immiscible solvent.
A process for dyeing synthetic fibre material with cationic or disperse dyes, which comprises dyeing said material in the presence of a dyeing assistant which comprises at least
- (a) an alkylbenzene or tetrahydroaphthalene, or a mixture thereof
- (b) an anionic surfactant,
- (c) a non-aromatic and water-immiscible solvent, and optionally,
- (d) a polar solvent and/or
- (e) a non-ionic surfactant.
A dyebath for dyeing synthetic fibre material which comprises least one cationic or disperse dye and a dyeing assistant containing at least
- (a) an alkylbenzene or tetrahydronaphthalene, or a mixture thereof,
- (b) an anionic surfactant,
- (c) a non-aromatic and water-immiscible solvent and optionally also
- (d) a polar solvent and/or
- (e) a non-ionic surfactant.
Dependencies are inferred from the claim text.