Lignin in wood composites

Details Lignin in wood composites Lignin in wood composites

C - Chemistry, Metallurgy

09

J

C09J 197/00 (2006.01) B32B 7/12 (2006.01) C09J 161/06 (2006.01) C09J 161/10 (2006.01) C08L 61/06 (2006.01) C08L 97/00 (2006.01)

Patent

CA 2133740

2133740 9321260 PCTABS00027 Novel adhesives for wood composites are described. The adhesives comprise a novel combination of an organosolv lignin and a phenol-formaldehyde resin in a weight ratio of from about 0.5:99.5 to about 70:30 based on phenolic solids in said phenol-formaldehyde resin. The adhesives further comprise a modifier which improves the performance of the adhesive. Adhesives comprising an organosolv lignin and a liquid phenol-formaldehyde resin are also described. The organosolv lignin solution is comprised in either an alkaline solution or in a dispersion. Adhesives wherein the organosolv lignin is phenolated or methylolated prior to incorporation with the phenol-formaldehyde resin are also described. Wood composites such as plywood, waferboard, oriented strandboard, particleboard, wallboard and molded products were manufactured using the adhesives of the invention. Results of board testing demonstrate that the wood composites of the invention are competitive with wood composites manufactured using commercial adhesives.

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