METHOD FOR GELING, PRELIMINATING AND GIVING BARE AND FUR BLOSSES AND FOR LEAVING LEATHER AND FUR

摘要

Disclosed is a method of self-tanning, pre-tanning and co-tanning skins and hides and for retanning leather and hides, using carbonyl compounds of formula (I), in which R1 is hydrogen, C1-C8 alkyl groups, phenylalkyl groups with a total of up to 12 C-atoms or phenyl groups, wherein phenyl residues may also be substituted with one or two C1-C4 alkyl groups, C1-C4 alkoxy groups, hydroxyl groups, amino groups, carboxyl groups, sulfo groups or halogen atoms; n is 1, 2, 3, or 4; and x is an OH, SH, NH2 or PH2 residue when n = 1, a bridging O, S, SO, SO2, NH, NR2, PH or PR2 group, where R2 is C1-C4 alkyl, when n = 2, a tertiary N- or P-atom or the trivalent group P =O when n = 3, and a quaternary N-atom when n = 4. The corresponding acetals or ketals of the carbonyl compounds of formula (I) may also be used.