RESEARCH OF NEW CHEMICAL MATERIALS FOR LIQUID FINISHING OF LEATHER

Abstract

The study of the physicochemical properties, structure and interaction of new generation commercial materials with collagen to establish the possibility of their use as retanning agents or other reagents in the liquid finishing of leather. To determine the properties and structure of the materials under study, we used common, as well as modern analytical and instrumental methods of research (titrimetric, viscometric, infrared spectroscopy, visual observation)The results of assessing the structure and physicochemical properties of new industrial materials in the form of two retanning agents Retanal RCN 40 synthesized based on anionic acrylic polymer (manufacturer Cromogenia Units, Spain) and Retanal LMV 100 obtained on the basis of melamine (manufacturer Cromogenia Units, Spain), as well as Politan BN syntan-neutralizer based on aromatic compounds (manufacturer Codyeco Spa, Italy) are presented.IR spectroscopic studies of these materials and the chrome fiber of collagen preparation processed by them were made.The nature and change in the optical density of the absorption bands on the protein spectrograms depending on the type of materials used in the work are determined.It was found that the studied materials interact mainly with nitrogen-containing, hydroxyl and peroxide groups of collagen. Peculiarities of interaction in the “collagen - chemical reagent” system in the presence of new chemical materials of synthetic origin intended for liquid finishing the leather are investigated. The results of the work will contribute to the expansion of the assortment and the justified use of effective chemical reagents in innovative technologies for the production of leather.