METHOD OF PRODUCING CURING AGENT FOR MEDIUM-MOLECULAR WEIGHT EPOXY RESINS Russian patent published in 2014 - IPC C08G77/26 C08G77/18 C08G59/40 C07F7/10 

FIELD: chemistry.

SUBSTANCE: invention relates to curing agents for epoxy resins and compositions based thereon. Disclosed is a method of producing an organosilicon curing agent for medium-molecular weight epoxy resins by reacting, for 2-3 hours at temperature of 80-100°C in the presence of an alkaline catalyst, an amine-containing organosilicon compound (I), an organosilicon compound with a phenyl group at the silicon atom (II) and an organosilicon compound containing two methyl groups at the silicon atom (III) with molar ratio of components I:II:III = 1.0:(0.5-1.0):(0.5-2.0) and total content of alkoxy groups to the total number of silicon atoms of 1-1.5.

EFFECT: simple method of producing organosilicon curing agents that are stable during storage, which enable to obtain paint coatings with good adhesion to different substrates and improved physical and mechanical properties.

1 cl, 3 tbl, 14 ex