Water-born polyurethane dispersions, containing polysaccharide in their structure

Abstract

A method of obtaining waterborn polyurethane dispersions containing the natural polysaccharide starch, stable over time and when diluted with water, has been developed by introducing an aqueous solution of starch into the reaction system with a combination of the chain elongation stage and the dispersion process, which is manifested in the high aggregative stability of the dispersions and the ability to form monolithic films, in contrast to mechanical mixtures. Materials acquire the ability to degrade in environmental conditions while maintaining the properties inherent in traditional ionomer polyurethanes. The use of the created method opens up opportunities for the creation of environmental-friendly materials with a given set of properties, promising as physiologically active materials for agriculture, in particular antiperspirants, phytoprotective and growth stimulating materials.