METHOD FOR PREPARING EPOXYURETHANE RESIN Russian patent published in 2007 - IPC C08G59/14 C08G18/58 

FIELD: organic chemistry, resins, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of epoxyurethane resin. Method involves stirring epoxide component with technical aromatic polyisocyanate at heating in their ratio from 85:15 to 98:2 at temperature 50-120°C for 50-210 min. Epoxide component represents a mixture of 4,4'-doixydiphenylpropane-base epoxy of molecular mass 340-600 Da (A), polyepichlorohydrin diglycidyl ester (B) and technical laproxide representing oligomer of propylene oxide with terminal epoxide groups of molecular mass 250-900 Da (C). The ratio A:B:C =from 5:70:25 to 90:5:5. Invention provides decreasing viscosity, providing high resistance to multiple thermal cycles from -60°C to +80°C, reducing foam formation in simultaneous achievement of high physical-mechanical properties of polymer. Proposed epoxyurethane resin is used in preparing resinous component of pouring compounds, binding agents for reinforces plastics, lacquers ad enamels, and as a resinous component of armor cover of reactive missiles and for other aims.

EFFECT: improved preparing method.

3 tbl, 10 ex