Shaped body made from wood particles and a pu bonding agent,...

Details Shaped body made from wood particles and a pu bonding agent,... Shaped body made from wood particles and a pu bonding agent,...

B - Operations, Transporting

27

N

B27N 3/00 (2006.01) B27N 1/00 (2006.01) C08J 9/08 (2006.01) C09J 175/04 (2006.01) C08L 1/02 (2006.01) C08L 97/02 (2006.01)

Patent

CA 2315008

The invention relates to a shaped body substantially consisting of A) wood particles and/or material containing cellulase (constituent A) and B) a porous PU agent (component B) in a weight ratio of 0.05-1.0: 1.0 (constituent B) to constituent A)). The inventive shaped body can be produced by reacting at least one polyisocyanate with at least one polyol and/or polyamine and at least one carboxylic acid as an expanding agent, preferably at temperatures of 80-100 °C with an initial pressure of over 1 kp/cm2. Gas formation and the final properties of the moulded bodies are substantially independent of the moisture content of component A). This is particularly valid with respect to high stability values and elasticity.

L'invention concerne un corps moulé qui est constitué essentiellement A) de particules de bois et/ou d'un matériau contenant de la cellulose (composant A), et B) d'un agent au polyuréthanne (composant B), le rapport en poids du composant B) au composant A) étant de 0,05 à 1,0: 1,0. Un tel corps peut être produit par réaction d'au moins un polyisocyanate comportant un polyol et/ou une polyamine avec au moins un acide carboxylique comme agent gonflant, de préférence à une température de 80 à 100 DEG C et avec une pression initiale supérieure à 1 kp/cm<2> . La formation de gaz et ainsi les propriétés finales de tels corps moulés sont, dans une large mesure, indépendantes de la teneur en humidité du composant A). Cela s'applique en particulier aux valeurs de résistance et à l'élasticité élevées desdits corps.

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