METHOD FOR PREPARING PHOSPHORUS-BORON-CONTAINING POLYURETHANS Russian patent published in 2006 - IPC C08G18/38 C08G18/46 C08G18/10 

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a field for preparing elastic phosphorus-boron-containing polyurethans. Invention describes a method for preparing phosphorus-boron-containing polyurethane by interaction of prepolymer prepared by interaction of hydroxyl-containing compound with di-isocyanate in the mole ratio OH : NCO-groups = 1:2 with phosphorus-boron-containing polyol of the formula (I): (see appendix I) wherein R means -CH₂-CH₂-; -CH₂-CH₂-O-CH₂-CH-; -CH₂-CH(OH)-CH₂-; -CH₂-CH₂-CH₂-CH₂-. Reaction is carried out in dimethylformamide medium in the mole ratio of prepolymer and phosphorus-boron-containing polyol = 1:(0.1-1). Proposed invention provides preparing elastic self-extinguishing phosphorus-boron-containing polyurethans with tear resistance value at the level 58 MPa and strength value 62.3 MPa. Proposed materials can be used as glues, lacquers, structural materials with reduced inflammability and high physical-mechanical properties.

EFFECT: improved preparing method, improved and valuable properties of materials.

2 tbl, 7 ex