METHOD OF PRODUCING CURING AGENTS OF EPOXY RESINS Russian patent published in 2013 - IPC C08G59/40 C08G59/46 C08K13/06 C08K5/18 C08K5/17 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing curing agents of epoxy resins involving an operation for reacting amines with monocarboxylic acids. The method is characterised by that the amine component used is a mixture consisting of a primary aromatic amine or a mixture of aromatic amines (A), a secondary aliphatic amino alcohol (B) and a tertiary aliphatic amino alcohol (C) in weight ratio A:B:C from 98:0.2:1.8 to 80:5:15. The monocarboxylic acid (D) is used in form of a 25-80% solution in a monoatomic aliphatic or aromatic alcohol, or ester thereof with a mono- or dicarboxylic acid, in ratio (A+B+C):D from 90:10 to 60:40 per 100% acid. The reaction process is then carried out by mixing in a reactor at temperature ranging from 50 to 130°C for 20 to 120 minutes and speed of the mixer of 100 to 3000 rpm.

EFFECT: curing agents obtained using said method have high stability during storage.

1 cl, 7 ex, 1 tbl