COMPOSITION OF EPOXY RESIN, PRE-PREG AND FIBRE-REINFORCED COMPOSITE MATERIAL Russian patent published in 2014 - IPC C08L63/00 C08G59/40 C08J5/24 

FIELD: chemistry.

SUBSTANCE: invention relates to epoxy resin compositions and can be applied as matrix resin of fibre-reinforced composite material. Composition contains epoxy resin [A], amine-based hardening agent [B] and block-copolymer [C]. Epoxy resin [A] contains components [Aa] - epoxy resin of biphenyl type, which has biphenyl structure and [Ab]. Component [Ab] contains components [Ab1'] - diglycidyl aniline derivative, [Ab2] - liquid epoxy resin of bisphenol type and [Ab3] - solid epoxy resin of bisphenol type. Component [B] is dicyandiamide. Block-copolymer [C], at least, one block-copolymer, selected from group consisting of S-B-M, B-M and M-B-M. Block M represents block, consisting of polymethyl methacrylate homopolymer, or copolymer, containing, at least, 50 wt % of methyl methacrylate. Block B represents block, which does not mix with block M and has temperature of vitrifying 20°C or lower. Block S represents block, which does not mix with blocks B and M and has temperature of vitrifying higher than temperature of vitrifying of block B.

EFFECT: invention makes it possible to obtain composition of epoxy resin, from which after hardening hardened products with excellent t heat resistance, elasticity modulus and resilience are obtained.

8 cl, 7 tbl, 36 ex