COATED FOAM PLASTIC PARTICLES AND METHOD OF MAKING NON-HALIDE CONTAINING, FIRE-RESISTANT MOULDED ARTICLES FROM FOAM PLASTIC IN FORM OF PARTICLES Russian patent published in 2012 - IPC C08J9/00 C08J9/22 C08J9/224 C08J9/232 C08J9/236 C09D1/04 C09D5/18 

FIELD: chemistry.

SUBSTANCE: method of making moulded articles involves a step for preliminary foaming intumescent styrene polymers into foam plastic particles, applying an aqueous polymer dispersion onto the foam plastic particles, drying the polymer dispersion to form a water-insoluble film, filling a mould with the foam plastic particles coated with the polymer film and sintering. The applied coating is made from an aqueous polymer dispersion which is obtained by mixing 40-80 pts.wt liquid glass solution, 20-60 pts.wt liquid glass powder and 5-40 pts.wt aqueous polymer dispersion.

EFFECT: possibility of processing coated foam plastic particles in a conventional apparatus, including with water vapour into non-halide containing and fire- and heat-resistant moulded articles from foam plastic; the foam plastic is self-extinguishing.

9 cl, 1 tbl, 4 ex