STUDY OF THE PROPERTIES OF ALKYD OLIGOMERS MODIFIED WITH AMINO URETHANE ACRYLATE COMPOUNDS BASED ON SOYBEAN OIL

The aim of the work is to modify existing paints and varnishes based on alkyd varnish (PF-170) and to create new film formers using functionalized oligomers to improve the properties of materials during their operation. In order to obtain new polymer materials, a method of synthesizing a modifier - an oligomeric amino urethane acrylate compound was developed, the synthesis of which was carried out in several stages with the preparation of aminourethane carbonate of soybean oil with the formation of urethane groups by the non-isocyanate method and the subsequent addition of a methacrylate oligomer. The reaction was monitored by the method of IR spectroscopy by the decrease in the intensity of the absorption band of the cyclocarbonate group (1803 cm–1), the formation of the absorption band of the urethane group (1698 cm-1), the redistribution of hydroxyl and amine groups, and was further evaluated by the disappearance of the absorption band of epoxy groups (909 cm–1) and the detection of the C=C absorption band (1638 cm–1). By adding the synthesized oligomer to an alkyd varnish, a new film-forming system was obtained for the formation of coatings by oxidative polymerization in air. The optimal concentration of the modifier is (5–7) % of its content. These materials are characterized by high viability, homogeneity, and make it possible to obtain transparent high-quality coatings with high physical and mechanical characteristics. The developed composite materials based on modified varnish can be recommended for practical use in various technologies for the production of coatings, alkyd varnishes, and paints, which are characterized by an appropriate set of physical and mechanical properties.