PHENYLENEDIAMINE COMPOSITION, SOLUBLE IN WATER, AND METHOD OF STABILISING ETHYLENICALLY UNSATURATED COMPOUNDS AND MONOMERS Russian patent published in 2009 - IPC C09K5/20 C07C215/16 C07C215/18 

FIELD: chemistry.

SUBSTANCE: inhibitor of premature polymerisation of ethylenically unsaturated monomers contains one or more compounds with a defined structural formula, related to a class of phenylenediamines. The present invention also pertains to methods of producing this inhibitor, to compositions, resistant to premature polymerisation of ethylenically unsaturated monomers, containing the proposed inhibitor, and to a method of reducing contamination and formation of deposits in the process of treating hydrocarbons after inhibiting polymerisation of hydrocarbons using such an inhibitor. The invention also relates to an inhibitor of premature polymerisation of ethylenically unsaturated monomers, obtained from reaction of a phenylenediamine compound with a defined structural formula, with a heterocyclic compound with a defined structural formula. The polymerisation inhibitors obtained in the proposed invention are soluble in water and therefore, when added to water, they do not form a separate layer, i.e. a boundary between the aqueous and hydrocarbon phases.

EFFECT: efficient inhibition of free-radical polymerisation of vinyl monomers, less contamination and formation of deposits in the process of treating hydrocarbons.

21 cl, 3 tbl