Process for retanning leather with acrylic-based oligomers

Details Process for retanning leather with acrylic-based oligomers Process for retanning leather with acrylic-based oligomers

1982-03-01

1984-03-27

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Leather dyeing

8 9421, 8 9433, C14C 322, C14C 328

Patent

active

044392010

ABSTRACT:
The invention relates to oligomers containing structural units of the formulae ##STR1## wherein X.sub.1 is --CN, --COOR.sub.1, --OOCR.sub.2 or --CONHR.sub.3, Y.sub.1 is --COOH or --COOM.sub.2, Y.sub.2 is --CONH.sub.2, --CH.sub.2 OH, --OCH.sub.3 or --OC.sub.2 H.sub.5, each of Z.sub.1, Z.sub.2 and Z.sub.3 is hydrogen, methyl or ethyl, each of M.sub.1 and M.sub.2 is an amine cation, an ammonium cation or an alkali metal cation, and each of R.sub.1, R.sub.2 and R.sub.3 is C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.8 -hydroxyalkyl or alkoxyalkyl containing altogether at most 8 carbon atoms, fatliquoring the treated leather and drying it, and, if appropriate, additionally dyeing said treated leather before or after it has been fatliquored.
These oligomers are suitable for use as tanning agents in a process for retanning chrome-tanned leather. The oligomers are prepared by copolymerizing comonomers of the acrylic acid series corresponding to the structural units of the indicated formulae, in the presence of sulfite or hydrogen sulfites of the formulae SO.sub.3 (M).sub.2 or HSO.sub.3 M, and have an average molecular weight of at most 14,000.

REFERENCES:
patent: 2205882 (1940-06-01), Graves
patent: 2205883 (1940-06-01), Graves
patent: 2893977 (1959-07-01), Suen et al.
patent: 3103447 (1963-09-01), Lowell et al.
patent: 3408319 (1968-10-01), Rau
patent: 3646099 (1972-02-01), Dannals
patent: 3774969 (1973-07-01), Alps et al.
patent: 3893977 (1975-07-01), Wingler
patent: 3945792 (1976-03-01), Wurmli et al.
patent: 4150944 (1979-04-01), Wurmli

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