COMPOSITION FOR FIRE- AND BIOPROTECTION OF WOOD (VARIANTS) Russian patent published in 1996 - IPC

FIELD: wood working and building industry. SUBSTANCE: according the first variant the composition has antipyrene: a mixture of reaction products at 34-78 C, equimolar amount of dialkylphosphite containing 1-4 C-atoms in alkyl, with amine of the formula RNHR′ where R - H or C₁-C₇-alkyl and R′ - C₁-C₇-alkyl, at the total phosphorus content in antipyrene 7.6-22.3 wt.-% and that of nitrogen - 3.4-10.1 wt.-%. According the second variant the composition has a mixture of interaction products at 128-150 C of equimolar amount indicated dialkylphosphite with dicarboxylic acid of the formula HOOCRCOOH where R - C₁-C₄-alkyl or C₂-C₄-alkenyl, at total phosphorus content in antipyrene 9.0-15.47 wt.-%. According the third variant the composition has a mixture of interaction products of equimolar amount of indicated dialkylphosphite with carbamide at 34-78 C or at 50-170 C with carboxylic acid amide of the formula RCONR′R″ where R - H, C₁-C₄-alkyl or C₂-C₄,-alkenyl, and R and R′ - H or C₁-C₄,-alkyl at total phosphorus content in antipyrene 8.2-20.2 wt.-%, that of nitrogen - 3.6-16.4 wt.-%. Fire-protective property of compositions with ceramic tube: mass loss is 1.3-6.3 wt.-%.. Bioprotective properties with fungus strain Coniphora cerbella: mass loss is 0 wt.-%. Composition stability at storage is above 500 days. EFFECT: enhanced effectiveness of composition. 6 cl, 3 tbl, 16 ex