Process for dyeing skins and furs
AssigneeCiba-Geigy Corporation
InventorMax Schwank
Life of this patent
Estimating the term…
Abstract
A new process for dyeing furs and skins below 70.degree.C is provided, which process is carried out with aqueous dyebaths containing a dyestuff, up to 15 g per liter of the whole preparation of an organic non-ionizable oxo compound with only limited solubility in water and optionally an emulsifier for these compounds. According to this process furs and skins can be dyed in deep and level shades with a broad scope of dyestuffs without any pretreatments for improving the dye-receptivity of the substrates.
Claims11
An exhaust process for dyeing skins and furs, comprising the step of applying to the skin or fur, in a goods-to-liquor ratio of 1:10 to 1:40, at a temperature in the range of 55.degree. to 70.degree.C, an aqueous dye bath having a pH of 3 to 6 which contains water, a water-soluble wool dyestuff, and 0.75 to 15 grams of a non-ionisable organic compound selected from the group consisting of isophorone and tributylphosphate, per liter of aqueous dyebath.
Dependencies are inferred from the claim text.