METHOD OF PRODUCTION OF FIREPROOF POLYURETHANE FOAM Russian patent published in 2006 - IPC C08G18/08 C08G18/48 

FIELD: production of fireproof polyurethane foam.

SUBSTANCE: proposed method includes interaction of composition containing polyether polyol, polyisocyanate, expanded graphite, amine activator-stabilizer, foaming agent (water or freon) and modifying agent: multi-atom alcohols and melamine cyanurate. Prior to interaction of polyether polyol with polyisocyanate, polyether polyol is mixed with amine activator, stabilizer, modifying agent and foaming agent; then expanded graphite and melamine cyanurate are added at ratio of 1-2 : 1 in the amount of 15-30 mass-% of total amount of components. Said composition contains additionally phosphate antipyren trichloroethyl phosphate. Proposed method enhances fire-retarding quality of polyurethane foam at retained physico-chemical characteristics (apparent density 45 kg/m³, breaking stress at compression of 330 kPa, heat conductivity coefficient 0.025 W/m² and heat absorption of 1.0% per 24 h) characterizing heat- and sound-insulating properties.

EFFECT: enhanced efficiency.

2 cl, 2 tbl, 3 ex