FIELD: chemistry.
SUBSTANCE: invention relates to a heat-insulating polymer foam which comprises a component which attenuates infrared radiation, and a method of producing the polymer foam. The polymer foam is prepared by extrusion foaming of a foamable thermoplastic polymer mixture using a foaming component. The mixture of foaming components contains 3-5 wt % carbon dioxide gas, less than 5 wt % alcohol containing 2-3 carbon atoms, less than 0.7 wt % water and less than 2.5 wt % isobutane; and where the foaming component contains at least 0.1 wt % water and/or alcohol containing 2-3 carbon atoms. The foam is obtained using 2-5 wt % of a component which attenuates infrared radiation, selected from petcoke and carbon black with particle size of 100-700 nm; 2.5-3.5 wt % bromine-substituted flame-retardant; and at least 0.1 wt % epoxy stabiliser.
EFFECT: obtained polymer foam has density in the range of 30-37 kg/m3, unimodal distribution of cell size, average cell size in the range of 0,15 to 0,4 mm, heat conductivity in the range of 28 to 35 mW/m·K; the foam withstands German fire-resistance test class B2.
10 cl, 2 tbl, 10 ex
