The effect of nitrogen-containing phenol oligomers on the viscosity-temperature properties of base motor oil is studied. It is found that the products of oxypropylation of phenol and monoalkylphenols (alkyl chain length -C 8 -C 12 ) in the presence of benzoguanamine, as well as oxypropylated benzoguanamine have a positive effect on these properties. It is also found and scientifically validated that the viscosity -temperature properties of base-oil compositions are affected by the concentration, component composition, and thickening power of oligomers in oil.Phenol oligomers or phenol compounds (alkylphenols with alkyl groups of various length and structure) and formaldehydes, which contain heteroatoms (nitrogen, sulfur, phosphorus), are used as multi-purpose and multi-functional oil additives. TsIATIM-339, TsIATIM-339s, VNIINP-360, VNIINP-370, VNIINP-715, Borin, IKhP-101, BFK, BFKu, etc. are industrial grades of alkylphenol detergent, antioxidative, and depressor additives. Some of them (TsIATIM-339, TsIATIM-339s, VNIINP-360, and IKhP-101) also possess antiware and anticorrosion properties [1]. Various salts (calcium, barium, zinc) of the condensation products of alkylphenols with formaldehyde and amines make up the greater part of these additives. As a rule, additives of this type do not possess thickening power, and do not improve the viscosity-temperature properties of base oils. The nitrogen-and sulfur-containing additive IKhP-21, which can be produced by reacting phosphorus pentasulfide as a product of alkylphenol condensation with formaldehyde, exhibits antioxidative properties and high thermal stability [2].In the search for new nitrogen-containing phenol oligomers possessing additional functional properties, we synthesized oil-soluble oligomeres by reacting phenol or its compounds (monalkylphenols with the C 8 -C 12 alkyl groups) with benzoguanamine (1,3-diamine-5-phenyl-2,4,6-triazine), and by reacting between benzoguanamine with propylene oxide, as well mixtures of the latter with polypropylene glycol [3, 4].

Conservation liquids have been prepared by adding to T-30 turbine oil different amounts of amidoamine compounds synthesized in 2:1 molar ratio of technical petroleum acids (TPA) to polyethylenepolyamine (PEPA), nitro-compound and phenol-p-alkyl(C8-C12)phenolformaldehyde olygomers on the basis of C14H28 containing α-olefin, as well as composition on the bases of them. Defined that the use of these compounds as compositions records high result as corrosion inhibitor in protection of metal constructions.

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The structures of novolac monoalkyl(C8-C12)phenol-formaldehyde oligomers, modified with imidazolines based on natural petroleum acids and polyamines-diethylenetriamine, triethylenetetraamine, polyethylenepolyamines were investigated by IR-spectroscopy. As a result of the analysis of the IR-spectra of the initial and final products, the reaction mechanism is proposed.

Исследовано молекулярно-массовое распределение моноалкил(С8-С12)фенол формальдегидных олигомеров, модифицированных амидоаминами на основе дистиллированных природных нефтяных кислот и полиаминов гель-хроматографическим методом. Изучена зависимость средневесовой и среднечисловой молекулярных масс, полидисперсности модифицированных олигомеров от их ком- понентного и количественного состава. Выявлены закономерности и высказаны предположения относительно числа моноалкил (С8-С12)фенолформальдегидных фрагментов в составе олигомерных макромолекул.