Preparation of monoalkyl (C8-C12) phenol-formaldehyde oligomers functionalized with imidazolines based on acids isolated from soybean oil and polyamines

Research has been carried out on the synthesis of phenol-formaldehyde oligomers modified with nitrogen-containing organic compounds for the purpose of their use as anti-corrosion additives in mineral oils. Compared to organic acids obtained by multi-stage transformations, the production of nitrogenous compounds based on fatty acids of plant origin implements the use of more reliable sources of raw materials based on natural resources. In order to expand the range of these compounds, the synthesis of phenol-formaldehyde oligomers modified with imidazolines based on fatty acids isolated from soybean oil and polyamines was carried out. In order to ensure the complete solubility of phenolic compounds in mineral oils, monoalkylphenols containing C8-C12 alkyl groups in the para position were used. The structure of monoalkyl (C8-C12) phenol-formaldehyde oligomers functionalized with imidazolines was studied in comparison with the initial components in the wave frequency range of 600–4000 cm-1 on a LUMOS “BRUKER” IR Fourier microscope made in Germany. The structure and physicochemical parameters of the obtained products were determined. Research on the use of synthesized compounds as anticorrosion additives for mineral oils was continued, satisfactory results were obtained.