ABSTRACT
The carboxyl groups terminated liquid rubber, whose chain can be extended with the help of diepoxides, was used as basic substance in that study. Utilization of waste leather buffing dust in the preparation of composites with rubber latexes appears to be possible. The working process was based on the using of liquid rubber OBNK-30, triepoxide ECHD, chromium octoate, 4,4’-diphenyl diisocyanate, and leather buffing dust as initial material. The decrease in hardness is most probably caused by the fact that the chromium octoate acts in the compound simultaneously as plasticizer and lubricant. The properties of the compounds can be purposefully influenced by a change of the mixture composition in accordance with the derived regression function. The effect of filler content on the physical properties of compounds conforms with the assumption ensuing from the laws of the behavior of filled compounds.
