FIELD: chemistry.
SUBSTANCE: invention relates to a concentrated polymeric composition (master batch) containing a) aromatic polymers and/or copolymers of vinyl in an amount equal to, at least, 10 wt %, in relation to the whole composition, b) at least, one compound containing epoxy functional groups in an amount of 0.01 to 5 wt %, relative to the whole composition, c) at least, one infrared radiation absorbing agent in an amount equal to, at least, 10 wt %, in relation to the whole composition, where the specified infrared radiation absorbing agent is selected from petroleum coke, graphite, or soot. Also the invention relates to the self-expanding compositions of aromatic polymers and/or vinyl copolymers containing A) at least, 50 wt % of aromatic polymers and/or copolymers of vinyl B) at least, one expanding agent, C) at least, one infrared absorbing agent selected from petroleum coke, graphite, or soot, D) at least, one halogenated agent making the composition fire-resistant, E) at least, one epoxy-containing functional group compound, the solubility of which in styrene, measured at a temperature of 25°C, is more than 5 g/100 g, the method of its obtaining, as well as expanding the granules and exfoliated products containing the specified composition.
EFFECT: improving the compound properties.
19 cl, 2 tbl
