SMOTHERING COMPOSITION Russian patent published in 2009 - IPC A62D1/06 

FIELD: means of protection.

SUBSTANCE: invention relates to combined fire-fighting compositions consisting of inhibiting and air-thinning components. Such compositions create synergetic effects on processes originating in flame and feature high-fire-fighting ability. Proposed composition comprising inert gas or mix of inert gases, e.g. nitrogen, carbon dioxide, argon, to inhibit combustion, uses additionally the additive representing cyclic phosphazens (phosphonitrils) of general formula (PNHal₂)_n where n ≥ 3; Hal is atom of chlorine, fluorine, completely or partially halogenated alkyl radicals, the component ratio being as follows: 0 to 99.5 wt % - carbon dioxide, 0.5 to 100 wt % - phosphazen. Ingress of proposed composition into atmosphere in whatever possible amount brings no harmful effects on either ozone layer or Earth climate.

EFFECT: synergetic effect on processes in flame, improved fire-fighting ability.

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