ИСТИНА

This disclosure related to a resin matrix composition includes: (1) polymerizable mixture containing one or more bis-phthalonitrile monomers in the amount of 20-94 wt % of the polymerizable mixture weight; one or more reactive plasticizer-fire retardants in the amount from 1 to 50% of the total polymerizable mixture weight; curing agent in the amount from 1 to 20% of the total polymerizable mixture. The total content of the polymerizable mixture and the curing agent is from 60 to 100 wt % of the total resin matrix weight. The invention allows to increase the thermal stability of the resin matrix and obtain composite material which after curing possesses increased thermal stability at temperatures up to 450° C., have melting points or glass transition temperatures of no more than 50° C., provide melt viscosities below 800 mPa.Math.s at temperatures from 100 to 180° C. and below 300 mPa.Math.s at temperatures from 120 to 180° C.