Patent ID: 7595116

Claim:
A process for the production of a wood body, comprising impregnating an untreated wood body with an aqueous solution of A) an impregnating agent selected from the group consisting of 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidin-2-one, 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidin-2-one modified with a C 1-5 -alcohol, a polyol or mixtures thereof, 1,3-dimethyl-4,5-dihydroxyimidazolidin-2-one, dimethylolurea, bis(methoxymethyl)urea, tetramethylolacetylenediurea, 1,3-bis(hydroxymethyl)imidazolidin-2-one, methylolmethylurea and mixtures thereof, and B) a catalyst selected from the group consisting of the metal salts, ammonium salts, organic acids, inorganic acids and mixtures thereof, and hardening the wood body impregnated with the aqueous solution while maintaining humid conditions at elevated temperature.