C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 175/04 (2006.01) C08G 18/64 (2006.01) C08L 97/02 (2006.01)
Patent
CA 2303900
An improvement is provided in a particulate adhesive for bonding lignocellulosic materials. Such lignocellulose materials include core particles and isocyanate coatings thereon. The improvement includes providing the particulate adhesive as a confricated mixture of the core particles and the isocyanate in a ratio range of the isocyanate to the core particles of 1:5 to 2:1. The core particles are selected to comprise crude cellulosic polysaccharide particles having activated -OH group-containing surfaces and a maximum particle diameter of 150 µm. The isocyanate coatings are reacted with the -OH groups on the activated surfaces of the core particles. The isocyanate coatings on the core particles have a thickness of 1 to 13 µm.
On fabrique des produits lignocellulosiques consolidés ou composites, tels que des panneaux de fibres, des panneaux de particules, des panneaux de copeaux, des agglomérés, des contreplaqués ou des composites de paille, au moyen d'un liant ou d'un adhésif en particules constituant des particules de matériaux crus de polysaccharide cellulosique, par exemple de la farine de bois ou de la paille broyée, revêtus par MDI ou par un autre liant d'isocyanate selon une épaisseur de 1-7 mu m.
Borden Ladner Gervais Llp
Carbocol Systems Inc.
LandOfFree
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