FIRE-RETARDANT PHOSPHORUS-SULPHUR ADDITIVES AND POLYMER SYSTEMS CONTAINING SAME Russian patent published in 2014 - IPC C07F9/165 C07F9/173 C07F9/177 C08K5/5398 C08J9/00 C08L101/12 

FIELD: chemistry.

SUBSTANCE: present invention relates to phosphorus-sulphur compounds with fire-retardant properties, of formula: , where X denotes oxygen, T denotes sulphur, each X' independently denotes oxygen or sulphur, n is the valence of A and equals at least 2, A denotes an organic binding group, as well as a method of producing a foamed polymer, which involves formation of a molten mixture of a combustible thermoplastic or thermosetting polymer, at least one foaming agent and said phosphorus-sulphur compound under pressure, and then extruding the molten mixture through a nozzle in a region of low pressure such that the molten mixture expands and cools to form a foamed polymer.

EFFECT: novel phosphorus-sulphur compound which is effective as a fire-retardant additive and a novel efficient method of producing foamed polymers with improved properties.

4 cl, 38 ex