FIRE RETARDANT AND METHOD OF PRODUCTION THEREOF Russian patent published in 2009 - IPC C07F9/40 C09K21/12 

FIELD: chemistry.

SUBSTANCE: invention refers to fire retardant based on hydroxyethylated diethyleneglycol and methylphosphonic acid ethers and applied as additive to polymer honeycombs and composite materials thus decreasing combustibility thereof. Offered fire retardant is characterised by production method and physical and chemical properties. Method of fire retardant production includes interaction of methylphosphonic acid dichloranhydride with diethyleneglycol. Besides water, hydrochloric acid and dimethylphosphonate can be appliedfor process. Then produced mixture is treated with ethylene oxide. Reagents are used in specified molar ratio at certain temperature conditions. Produced fire retardant is moderately viscous liquid of dynamic viscosity 600.0-630 centipoise at 25°C, phosphorus mass fraction 16.8-17.5 %, volatile mass fraction 1.2-1.3 %.

EFFECT: production of new effective additive to polymer honeycombs and composite materials thus decreasing combustibility thereof.

1 cl, 3 ex, 1 tbl