Abstract: The present disclosure relates to a composition comprising an expanded and micronized volcanic glass (EMVG) and at least one chemical agent, wherein the at least one chemical agent is coated on the surface of the volcanic glass. The present disclosure also relates to an improved process to remove mineral impurities and to coat the surface of the EMVG. The disclosed composition can be used a functional reinforcing filler to improve the mechanical properties of plastic.

Abstract: A mica-based electrically-conductive filler and reinforcing material, and methods of producing it. The material comprises milled mica particles and an electrically-conductive media such as carbon black or silver or copper adhered to the mica by a binder system. The material contributes both electrical conductivity and improved physical properties such as increased stiffness, increased tensile strength, and increased scratch resistance to materials for antistatic and electromagnetic shielding such as thermoplastic and thermosetting polymers, in a cost-effective manner relative to alternative prior art electrically-conductive and reinforcing materials.