WOOD BOARDS Russian patent published in 2023 - IPC C08L97/02 C08G12/06 C09J161/20 B27N3/00 

FIELD: building materials.

SUBSTANCE: invention relates to wood boards. A method for the production of a wood board is proposed, including: application of a binding composition in the form of an aqueous solution to free wood material to obtain tarred free wood material, where the binding composition is obtained by combination of reagents containing at least 50 wt.% of dry weight of a reducing sugar reagent/reagents and at least 5 wt.% of dry weight of a nitrogen-containing reagent/reagents; placement of tarred free wood material in the form of a sheet, and action on the sheet of freely placed tarred wood material with heat and pressure with curing of the binding composition to form a wood board. In this case, the nitrogen-containing reagent/reagents contains/contain at least 5 wt.% of dry weight of tri-primary triamine (TPTA)/tri-primary triamines, and it is an organic compound having three and only three amines, wherein each of amines is primary amine or its salt selected from a) tri-primary triamine having spacer groups between each of three primary amines, which consist of carbon chains; b) tri-primary tri-amine having spacer groups between each of three primary amines, where each spacer group has a spacer length, which is less than or equal to 12 polyvalent atoms; and c) tri-primary triamine having a total number of polyvalent atoms, which is less than or equal to 23. Wood boards are also proposed.

EFFECT: obtainment of wood boards, which have improved bond strength, separation strength, tensile strength, and low swelling properties.

17 cl, 11 dwg, 8 tbl, 5 ex