Poly(vinyl acetate) (PVAc) adhesives are widely used for wood bonding but are limited by their fossil-based origin and poor water resistance. Chitosan-graft-PVAc adhesives that were synthesized via emulsion polymerization to enhance water resistance and reduce fossil content. Two types of chitosan —high and low molecular weight—were evaluated. While high molecular weight chitosan improved water resistance, its high viscosity limited the adhesive's solid content to 17 wt%. Using hydrolyzed (low molecular weight) chitosan enabled formulations with up to 34 wt% solid content and 40 wt% chitosan. Complete grafting of VAc onto chitosan reduced polymer chain mobility, improving creep resistance and bond strength. Adhesives with chitosan outperformed conventional PVAc in both dry and wet bond strength, demonstrating chitosan's potential as a sustainable, high-performance component in wood adhesives. More details will be conveyed in the presentation.