Development of an eco-friendly hybrid lacquer based on kurome lacquer sap

An eco-friendly hybrid lacquer that dries quickly in a low relative humidity environment was synthesized using kurome lacquer (KL) and volatile organic compound-free hydrolyzed amine-functionalized silane (HAS). The HAS structure was characterized by nuclear magnetic resonance (NMR), and the results showed that the ethoxysilyl group in N-(2-aminoethyl)-3-aminopropyltriethoxysilane was completely hydrolyzed. After hybridization with the kurome lacquer, the properties of the hybrid lacquer were measured in detail including viscosity, molecular weight, drying behaviors, and film hardness. Viscosity measurements confirmed the mechanism of hydrolysis and the condensation reaction of silane.