Effect of nitogen-containing phenol oligomers on the viscosity-temperature properties of base motor oil

Abstract

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].

Nitrogen-Containing Oxypropylates of Phenol and its Derivatives as Oxidation and Corrosion Inhibiting Additives to Engine Oils

“…These oligomers were tested with positive results as additives for various functions, such as antimicrobial [10], thickening [11], deterging [8], and wear-resisting [12], etc., which prove them to be multifunctional.…”