Timber adhesive comprising isocyanate groups and application method thereof

The present invention relates a timber adhesive comprising isocyanate groups, including the following components: (a) polyisocyanate and/or derivative thereof, (b) polyamide, and (c) a coupling agent. The present invention also provides an application method of the adhesive. When the timber adhesive composition of the present invention is used as a wood-based board adhesive, the timber adhesive composition has outstanding waterproof properties and excellent mechanical properties.