DIPHENYLAMINE, ALKYLATED WITH OLEFIN MIXTURES, CONTAINING FRACTIONS WITH DIFFERENT DEGREE OF ACTIVITY Russian patent published in 2009 - IPC C07C211/55 C07C209/68 C08K5/18 C08L101/00 C10L1/223 C10M133/12 C10L1/10 

FIELD: chemistry.

SUBSTANCE: invention relates to improvement of the method of alkylating diphenylamine, involving addition of isobutylene oligomers to diphenylamine in the presence of acid clay catalyst with formation of a mixture, and carrying out the reaction at temperature sufficiently low for preventing significant reduction of catalyst activity until completion of the said addition. Temperature is then increased, obtaining a mixture of alkylated diphenylamines, containing: 0.1 to 1% diphenylamine, less than 10% (tert-butyl)diphenylamine, less than 10% monooctyldiphenylamine, more than 20% dodecyldiphenylamine, more than 15% hexadecyldiphenylamine, less than 10% eicosenyldiphenylamine, less than 7% tetracosenyldiphenylamine, less than 4% octacosenyldiphenylamine and less than 2% polyisobutyldiphenylamine. The said diphenylamine is added to a mixture of olefins, containing fractions which are characterised by high reaction capacity, as well as fractions, which exhibit relatively lower reaction capacity, at temperature sufficiently low for preventing significant reduction of catalyst activity until the said addition is complete, and then latter at high temperature, obtaining a mixture of alkylated diphenylamines, where the given mixture contains not more than 27% products of alkylation with C₈ chains or shorter, and more than 15% products of alkylation with C₂₄ chains or longer, so as to increase rate of alkylation with participation of less reactive fractions. The invention also relates to the obtained mixture of alkylated diphenylamines, with antioxidant properties, and to a composition with antioxidant properties, containing A) an organic product, chosen from a group consisting of lubricant materials, hydraulic liquids, process oils, fuel and polymers, in amount of 90 to 99.5 wt %; and B) stabilising quantity of a mixture of alkylated diphenylamines from 0.05 to 10 wt %.

EFFECT: new compounds have useful biological properties.

13 cl, 3 dwg, 4 tbl, 4 ex