METHOD OF PRODUCING CURING AGENTS OF EPOXY RESINS Russian patent published in 2013 - IPC C08L63/00 C08G59/56 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing curing agents for epoxy resins for making large articles, anticorrosion coatings and other purposes. The curing agents are obtained by mixing a eutectic mixture of aromatic amines with a product of reacting an acid of general formula R₂R COOH, where R is an aliphatic, cycloaliphatic or aromatic hydrocarbon moiety, R2 is a substitute -Cl, -F, -NH₂, -NH-, -OH, -CH=CH-, -CH=CH₂ (A) with a di- or polyamine of an aliphatic, cycloaliphatic or aromatic type, (B) and a polyatomic alcohol with containing 2-6 hyroxyls per molecule, (C) with ratio A:B:C from 70:29:1 to 20:70:10 by mixing in a medium of an ether of a di- or tricarboxylic acid and a monoatomic alcohol at temperature of 20-80°C for 10-120 minutes, with the ratio of the reaction product to the eutectic mixture of aromatic amines from 5:95 to 95:5.

EFFECT: invention enables to obtain curing agents which enable to reduce the exothermic effect when curing large-sized articles and increase strength of the obtained polymers during cavitational action of water.

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