FIELD: chemistry.
SUBSTANCE: invention relates to a method of inhibiting premature polymerisation of styrene monomers involving addition of the following combinations to the said monomers: (A) 0.001 to 10 wt % of a sulfonic acid compound having the following structure: 
, where R is a hydroxyl group, a straight or branched alkyl group having 1 to 32 carbon atoms or an alkylphenyl or alkylnaphthyl group, each having at least one straight or branched alkyl group having 1-32 carbon atoms; and (B) at least one amine selected from a group consisting of triethylamine, diethylamine, tributylamine, pyridine, N-(1,4-dimethylpentyl)aniline or N-methylpyrrolidinone in concentration of 0.1 to 2.0 molar equivalents per molar equivalent of the said sulfonic acid compound. The invention also relates to a composition for inhibiting premature polymerisation of styrene monomers.
EFFECT: design of a method through which uncontrolled exothermic reaction between the said sulfonic acid compound and the said styrene monomers can be prevented.
11 cl, 11 ex
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