Triethylamine Stabilizer for Resins in Douglas-Fir Particleboard

The addition of small amounts of triethylamine to urea- formaldehyde resins used in the production of Douglas-fir particleboard resulted in retention of bonding ability for longer time periods and alleviated the problems of resin pre-cure associated with fast-curing resins and moderate press closing times. Conditions evaluated included determination of the optimum level of buffering; determination of effects of resin application followed by various delay times before pressing, and effects of a press cycle to simulate resin pre cure conditions on boards prepared with and without the transient buffer. Triethanolamine and ammonia are not so useful as triethylamine as a transient buffer in these resin systems because of their inherent volatility and/or reactivity characteristics.

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