METHOD OF PRODUCTION OF FIRE RESISTANT FILLED POLYURETHANE Russian patent published in 2008 - IPC C08G18/08 C08G18/48 C08J9/08 

FIELD: chemistry.

SUBSTANCE: invention relates to method of production of fire-resistant foampolyurethane basing on composition, which includes polyetherpolyol, polyisocyanate, extended graphite, amine activator, frothing agent - water or Freon, melamine cyanurate and glycerin, polyethrpolyol in interaction with polyisocyanate is preliminary mixed with amine activator, glycerin, frothing agent and mixture, composed of extended graphite, melamine cyanurate and phosphogypsum as modifying agent, with ratio (1-2):(1-2):1 respectively, phosphogypsum being introduced in amount from 30 to 50 wt % from total amount of components. Foanpolyurethane, produced by means of claimed method, has high fire-resistance, preserving heat-insulating and soundproof properties, higher strength indices, and is more economically profitable, as contains as part of its composition cheaper mineral filler, namely phosphogypsum, which is waste product of phosphoric acid and phosphate fertilizers production. Such foampolyurethane can be applied in transport, construction and other branches of industry, where heat- insulating and sound-proof materials are required.

EFFECT: creation of efficient method of fire-resistant foampolyurethane production.

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