ADHESIVE LUMP Russian patent published in 1995 - IPC

FIELD: adhesives. SUBSTANCE: the composition comprises a product of combination of a furfurol-acetone resin resulting from the furfurol distillation residue 47.6-71.6 mole % by furane aldehydes and acetone in a 2:1 weight ratio with epoxy diane resin in a 7-3 to 3-7 weight ratio. The amine hardener is a mixture of a fraction resulting from waste production of a product of condensation of adipic acid and hexamethylene diamine having a boiling point of 200-204 C, an amine number of 930-943 mg KOH/g, said fraction containing 4-4.5 wt % hexamethylene diamine and 1.6-1.7 wt % water, with the initial hexamethylene diamine rectification residue in a 1:15 to 1:17 weight ratio. The filler is a mixture of phosphoric silica gel containing 55-95 wt % SiO₂; 10.5-12.5 wt % phosphoric acid and 2.5-3.0 wt % alkaline metal in terms of Na₂O and arzamite, proportions of the components being as follows (wt % ): 100 furane-epoxy binder; 25-35 amine hardener; 100-150 phosphoric silica gel, and 50-65 arzamite. EFFECT: improved properties of the adhesive lump. 2 tbl