FIRE-RESISTANT POLYSTYRENE Russian patent published in 2012 - IPC C08J9/00 C08J9/22 C09K21/06 C04B16/08 

FIELD: chemistry.

SUBSTANCE: invention relates to fire-resistant foamed polystyrene articles which can be used in building and fitting houses. The foamed article with apparent density of 5-200 kg/m³ is obtained from a composition containing the following components, wt %: 25-60 foamed or foamable small beads or particles of polystyrene, 10-30 foamed substance, 30-50 fire-resistant binder which is an inorganic material selected from a list which includes metal silicates, metal aluminates, metal aluminosilicates and zeolites. The foamed substance is at least one substance selected from a group comprising melamine, phosphine, phosphonate, foamed graphite, foamed small glass beads and nanoclay. Also described is a method of producing a fire-resistant foamed polystyrene article, involving a step for applying a coating of fire-resistant binder and a foamed substance on foamed small beads or particles of polystyrene, drying the coated small beads, transferring the coated small beads or particles into a die mould and pressing and moulding the small beads or particles at high temperature.

EFFECT: higher fire-resistance of foamed articles made from polystyrene and preserving structural strength when in contact with fire.

10 cl, 2 tbl, 5 ex