FIELD: chemistry.
SUBSTANCE: resin system comprises the following components: (i) a thermosetting resin comprising, at least, one tri-functional epoxy resin and, at least, one four-functional epoxy resin, (ii) thermoplastic polyamide particles having a melting temperature TPA; and (iii) one or more curing agents. The resin system does not contain epoxy resin with a functionality of less than three. The starting components of the resin system are selected so that the thickening of the epoxy matrix during the curing cycle of the resin system occurs at a thickening temperature TGEL at or below TPA. The resin system is cured at a temperature TC in the range of 170 to 190°C, and all thermoplastic particles have a melting temperature TPA not higher than curing temperature TC. The method of producing a composite material is to provide a resin system and combine it with reinforcing fibres. The system is then cured at a temperature in the range of 170 to 190°C at a rate of change of hardening RCR in the range of 0.05 to 3.0°C/min.
EFFECT: invention makes it possible to produce a composite material containing thermoplastic particles that increase impact resistance, and having improved compression characteristics under conditions of elevated temperature and humidity, and to reduce or eliminate the formation of microcracks during curing.
14 cl, 8 dwg, 7 tbl, 4 ex
