METHOD OF PELT PROCESSING Russian patent published in 2011 - IPC C14C11/00 

FIELD: process engineering.

SUBSTANCE: proposed method comprises retanning half stuff by chrome tanning agent, neutralisation, rinsing, dyeing, stuffing, filling with water-soluble acrylic retanning by organic tanning agents, setting, drying and pickling by applying clear primer, first compaction, twofold application of finishing composition, first fixation of coating, second compaction and second fixation. Filling with acrylic polymer is performed after dyeing. retanning by organic tanning agents is performed prior to stuffing. After stuffing, half stuff is additionally filled for 20-30 min with 40%-water dispersion of copolymer of butadiene, acrylonitrile and methacrylic acid in the ratio of 50:45:5 at the flow rate of 3-4% of half stuff bulk.

EFFECT: production of water-, oil-, gasoline- and heat resistance leather.

2 cl, 2 tbl, 5 ex