Wood composite prepared with a b-stageable resin

Details Wood composite prepared with a b-stageable resin Wood composite prepared with a b-stageable resin

C - Chemistry, Metallurgy

08

L

C08L 61/14 (2006.01) B27N 1/00 (2006.01) B27N 3/00 (2006.01) C08G 8/24 (2006.01) C08L 97/02 (2006.01)

Patent

CA 2254657

A method for making a consolidated wood product comprising coating wood components with a B-stageable, phenol-formaldehyde resole resin; heating the coated wood components to about 80 to 140°C for a time sufficient to advance the resin to a B-stage; forming a mat or stack of the wood components coated with the B- stage resin; exposing the mat or stack of coated wood components to a saturated or superheated steam atmosphere in a hot press; and compressing the layup to form the consolidated wood product. The phenol-formaldehyde resole resin used in the method has a number average molecular weight of between about 200 and 600, has a F:P mole ratio of about 1.3:1 to 2.0:1, and has been modified with 0 to about 5.5 wt % of caustic based on resin solids.

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