Plasticizers; Acrylic resins, unprocessed; Artificial resins, unprocessed; Chemical preparations in the nature of ion-exchange resins; Epoxy resins, unprocessed; Plastic molding compounds for use in plastic extrusion operations; Silica gel; Synthetic resins, unprocessed; Unprocessed phenolic resins; Unprocessed plastics in the nature of filtering materials in contaminants separation processes; Unprocessed polyvinyl chloride resins; Unprocessed silicone resins; Unprocessed synthetic resins for...