SPECSIL – Silicone Pressure-Sensitive Adhesives Exhibit Increased Thermal–Mechanical Properties

New self-adhesive tapes based on AGLEV®SI 200 (AG) modified silicone resins has been studied. This study was aimed to find effective methods for AG modification using a coupling agents, and 3-aminopropyltriethoxysilane (APTES). Results revealed that the amine groups from the APTES were effectively loaded and evenly spread on the surface of the AGLEV®SI 200 fibers. The described technique of modifying AG enables an increase in the chemical compatibility of this mineral with certain resins for use in pressure-sensitive heat-resistant silicone adhesives. By loading modified AG, it was possible to considerably increase the temperature resistance of novel self-adhesive materials while retaining their excellent self-adhesive characteristics. The composition comprising 0.5 wt% of modified AG (AG-0.5APTES), which exhibits a thermal resistance above 225 ºC, demonstrated the best characteristics. Additionally, this composition-maintained cohesiveness at both room and increased temperatures for more than 72 h, stable shrinkage for 0.46%, adhesion for 11 N/25 mm, and tack for 39 N, respectively.