FIELD: woodworking industry.
SUBSTANCE: invention relates to a method for producing a wood-based material, to a delaminated dispersion, its use for hydrophobising a material containing lignocellulose, to a two-component system for hydrophobisation of a material containing lignocellulose and to the use of a polyfunctional polymer compound as a demulsifier for delaminating the dispersion. Method of producing wood-based material comprises steps of (a) preparing wood particles, (b) binding the wood particles with a binder, (c) pressing the bound wood particles to produce a wood-based material. Before, or during, or after step (b), the wood particles and/or binder are brought into contact with the delaminated dispersion. Polyfunctional polymer compound diphenylmethane diisocyanate is used as a demulsifier for delamination (breaking) of a wax-containing dispersion that contains an aqueous phase as a continuous phase, a dispersed phase containing a wax, and at least one emulsifier. Delaminated dispersion for hydrophobising a material containing lignocellulose is obtained by mixing at least one wax-containing dispersion (A) containing the following components: I) at least one aqueous phase as a continuous phase, II) at least one dispersed phase containing wax, and III) at least one emulsifier; with a demulsifier (B) containing at least one functional group. Two-component system (a ready-made set of components) includes at least two components A and B: wax-containing dispersion (A) comprising at least one aqueous phase as a continuous phase, at least one dispersed phase containing wax, and at least one emulsifier; and demulsifier (B) containing at least one functional group for breaking the wax-containing dispersion.
EFFECT: invention improves resistance of wood materials to water and humidity of the environment and high strength properties.
27 cl, 3 tbl, 8 dwg
