FIELD: woodworking industry.
SUBSTANCE: application of letavin, the product of the directed condensation of phosphoric acid and urea in the presence of a catalyst with the molecular weight of MW=300±20, with the percent of phosphorus in the product of P=17±1% with pH=4.0±0.5, as a component of wood boards based on amido-formaldehyde resins, or based on urea-formaldehyde resins, or a component of outer layers of particleboards of formaldehyde emission class of E 0.5% in an amount of 1.6-3.2% by weight of the wood chips.
EFFECT: invention enables to improve the efficiency of processing, to improve the curing process and the structure of the polymer obtained.
3 cl, 2 tbl, 7 ex
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