Process for the photochemical and thermal stabilization of undyed and dyed polyester fibre materials
AssigneeCiba-Geigy Corporation
InventorsDieter Reinehr, Gerhard Reinert, Manfred Rembold
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Abstract
A process is described for the photochemical and thermal stabilisation of undyed and dyed polyester fibre materials, which comprises treating said materials with a compound of formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other C.sub.1 -C.sub.12 alkyl. Dyeings and prints of superior lightfastness and sublimation fastness on polyester and cellulose acetate are obtained by this process.
Claims5
A process for the photochemical and thermal stabilization of undyed polyester fibre materials, which comprises treating said materials with an effective amount of a compound of the formula ##STR10## wherein R.sub.1 and R.sub.2 are each independently of the other C.sub.1 -C.sub.5 alkyl in the temperature range from 80.degree. to 135.degree. C. and a pH range from 4.5 to 5.5 and wherein the compound of formula (1) is added directly to an aqueous exhaust dye liquor or to an aqueous padding dye liquor.
Dependencies are inferred from the claim text.