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 of epoxy resins and can be used to produce epoxide compositions with improved processing properties. The curing agents are obtained by reacting di- or polyepoxide compounds with nitrogen-containing compounds. The nitrogen-containing component used is a mixture which consists of one or two compounds having in their structure one or more tertiary nitrogen atoms and simultaneously one or more functional groups -NCO, -OH, -CH₂OH (A) and compounds which contain, alongside the tertiary nitrogen atom, a primary or secondary amino group (B) in ratio A:B ranging from 99:1 to 70:30. Components react in the ratio of the epoxide compound to the nitrogen-containing component ranging from 90:10 to 50:50 while stirring at temperature of 40-220°C for 10-150 minutes.

EFFECT: invention increases storage stability of curing agents, improves processing properties of epoxide compositions and improves strength properties after climatic action.

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