FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing wood materials from lignocellulose-based grinding products, with low emission of volatile organic compounds and aldehydes. The lignocellulose-based grinding products and an adhesive based on amino plastic, diisocyanates, polyurethanes and/or tannin-formaldehydes or mixtures thereof are prepared. The lignocellulose-based grinding products are mixed with the adhesive and the mixture is pressed during heat treatment. Before pressing and after splitting into fibres or processing into chips, a combination is added to the grinding products, said combination comprising at least one component having buffer capacity, selected from a hydrosulphite salt or sulphite salt. At least one component is optionally added, said component being selected from urea, a urea derivative or hydroxides of alkali, alkali-earth metals or ammonia.
EFFECT: wood material obtained using the method have low emission of volatile organic compounds and aldehydes, particularly formaldehyde, during synthesis thereof and during prolonged use thereof.
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Authors
Dates
2012-12-20—Published
2008-08-08—Filed