FIELD: biotechnology.
SUBSTANCE: invention relates to a self-extinguishing polymeric composition. Self-extinguishing polymeric composition comprising: a) a stabilizing polymeric composition containing i) from 80 % to 99.5 % by weight of one or more vinylaromatic polymers compatible with each other; and ii) from 0.5 % to 20 % by weight of at least one block copolymer containing: 1) at least one vinylaromatic polymer block compatible with (i), and constituting a weight quantity equal to or higher than 15 % by weight with respect to the whole block copolymer, and 2) at least one vinyl copolymer block containing epoxy groups so that there is from 0.7 % to 19 % by weight of oxirane oxygen calculated on the total of block copolymer; and b) from 0.03 phr by weight to 10 phr by weight, calculated on the basis of component (a), of at least one halogenated flame retardant. Foam beads, moldings and polymer foams are also described.
EFFECT: technical result: a self-extinguishing polymeric composition containing halogenated retarding combustion agents with improved thermal stability, and vinylaromatic polymers, which ensures the effectiveness of flame retarding agents in economically advantageous concentrations.
12 cl, 4 tbl
