Preparation and Adhesion Performance of Transparent Acrylic Pressure Sensitive Adhesives Containing Biomass-derived Menthol Moiety

Transparent acrylic pressure sensitive adhesives (PSAs) were successfully prepared by photopolymerization with 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate as a default constituent and with isobomyl acrylate and biomass derived menthyl acrylate as a variable constituent. The concentration effect of menthyl acrylate in the acrylic PSAs was investigated on adhesion and the optical properties as well as the characteristics (solid content, and molecular weight) of the syrups were also investigated. Regardless of increasing menthyl acrylate concentration in the acrylic PSAs, the acrylic PSAs exhibited almost the same adhesion performance such as 180 degrees peel strength (similar to 3.5 kg(f)/25 mm) and probe tack (similar to 0.25 kg(f)). All acrylic PSA samples also showed high transmittance (more than 93%), low haze (less than 1.0%) and low color-difference (less than 1.0).