Abstract
Plywood boards were prepared from pine and eucalyptus woods using resins obtained by copolymerization of phenol, formaldehyde and pre-methylolated acetosolv pine lignin. The influence of the lignin:phenol, formaldehyde:phenol and soda:phenol ratios on the properties of the resins and the quality of the boards was determined. Several formulations produced resins with knife-test results better than those obtained with a commercial phenol–formaldehyde resin.
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