Bath pigmentation of leather

Details Bath pigmentation of leather Bath pigmentation of leather

D - Textiles, Paper

06

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8/6

D06P 1/44 (2006.01) D06P 1/56 (2006.01) D06P 1/607 (2006.01) D06P 1/613 (2006.01) D06P 3/32 (2006.01)

Patent

CA 1334045

Process for the bath pigmentation of leather, which com- prises dyeing the leather with pigment dispersions which contain a compound of the formula (I) Image (I) where Ar is benzene or naphthalene, X is -CH2-CH2- and/or -CH2-CH(CH3)-, 0 to (m-1) of the radicals A are hydrogen, 1 to m of the radicals A are benzoyl and/or naphthoyl, 1 to m of the radicals A are -CO-CH=CH-COOM and/or -CO-CH2-CH(SO3M)-COOM, where M is a cation, R1, R2 and R3 are hydrogen or alkyl of 1 to 14 carbon atoms, R is hydrogen and/or alkyl of 1 to 9 carbon atoms, n is a number from 1 to 150 and m is a number from 2 to 12, the pigment having an average particle size of 50 to 500, preferably 80 to 300, nm. By using these dispersions, which contain the pigments in a very finely divided form, it is possible to obtain thorough penetration of the leather with improved light fastness.

605573

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