Removable biobased waterborne Pressure-Sensitive Adhesives containing mixtures of isosorbide methacrylate monomers

Abstract

Growing environmental concerns are enforcing sustainable recycling processes for glass substrates, especially bottles, where a fast cleaning and minimization of the use of solvents is desired. In this process, labels and adhesives are mostly removed by the addition of harsh reagents, alkaline solutions or high temperature, increasing economic costs and harming the environment. Herein, high performance and biobased waterborne pressure-sensitive adhesives with fast removability in water have been developed using small percentages of isosorbide (derived from glucose) based methacrylate monomers. Formulations containing 2-Octyl acrylate and isobornyl methacrylate and small amounts (1 wt%) of these monomers not only yield stronger adhesive fibrils, but also promote a removability in water six times faster than that of non-isosorbide based counterparts. This waterborne isosorbide containing PSAs represent an alternative to current PSA formulations towards a more sustainable glass recycling and/or reusing processes.