EPOXY BINDER, PREPREG BASED THEREON AND ARTICLE MADE THEREFROM Russian patent published in 2014 - IPC C08L63/00 C08K5/41 C08J5/24 

FIELD: chemistry.

SUBSTANCE: invention relates to preparation of epoxy binder for polymer composite building materials based on carbon fibre filler, which can be used in aviation, space, car and shipbuilding industries, as well as other industries. The epoxy binder contains, wt %: polyfunctional epoxy resin 10.0-50.0, diglycidyl ether of resorcinol hydroxyl groups 10.0-50.0, polyisocyanate 0.1-3.5, curing agent 4,4'-diaminodiphenylsulphone 17.0-30.0, polyarylsulphone 5.0-30.0. Disclosed is a prepreg containing said epoxy binder and fibre filler in the following ratio, wt %: epoxy binder 30.0-50.0, carbon fibre filler 50.0-70.0. Articles are made by moulding the prepreg.

EFFECT: invention enables to produce high-strength articles with improved mechanical properties, which are resistant to unfavourable operational factors, thermal and moisture-induced ageing and capable of maintaining their properties after such action.

8 cl, 3 tbl,12 ex