METHOD TO GLUE TIMBER-BASED MATERIALS Russian patent published in 2012 - IPC C09J5/00 

FIELD: construction.

SUBSTANCE: surfaces to be glued are coated with a synthetic glue KFZh based on an aminoformaldehyde resin. These surfaces are joined. Adhered parts are placed between DC poles of an electromagnet so that magnetic force lines are directed perpendicularly to an adhesive seam with intensity of (3-24)×10⁴ A/m. The glue as an acid hardener contains a chemical production waste, containing at least 80% maleic acid in amount from 0.5 to 2.0 wt parts per 100 wt parts of the aminoformaldehyde resin.

EFFECT: invention makes it possible to increase strength indices of glue joints.

1 tbl, 1 ex