Process for the mass coloration of linear polyesters
AssigneeCiba-Geigy Corporation
InventorFridolin Babler
Life of this patent
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Abstract
A process for the mass coloration of linear polyesters wherein the colorant is a mixture of consisting of 0.05 to 0.35% by weight, based on the amount of polyester, of a thioindigo and/or dioxazine pigment and one or more polymer-soluble dyes which are different therefrom. Unexpectedly brilliant strong colorations of excellent lightfastness are obtained.
Claims9
A process for the mass coloration of a linear polyester by homogeneously mixing said polyester and a colorant which is a mixture consisting of (a) 0.05 to 0.35% by weight, based on the amount of polyester, of one thioindigo pigment, one dioxazine pigment or mixture of the two and (b) a polymer-soluble dye selected from the group consisting of anthraquinone, azo, azomethine, phthalocyanine, perinone, isondolinone, methine and triazine dyes.
Dependencies are inferred from the claim text.