COMPOUNDS CONTAINING WASTE SILICONE RUBBER AND SCRAP THERMOPLASTICS
Original Publication Date: 1997-Oct-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Disclosed is a method for compounding materials containing one or more waste streams, such as silicone rubber and scrap thermoplastic materials originally used in, for example, coatings for roll fusers, structural cabinetry enclosures, and the like applications, into renewed related structural material applications. In an exemplary example, silicone rubber stripped from a used and retired roll fuser is added to a Banbury mixer at about 350 degrees Fahrenheit along with, for example, a high impact polystyrene and or acrylonitrile butadiene styrene virgin or waste plastics. The resulting blend as sheets were roll milled, chopped and injection molded. Many different coupling agents can be used and were found to improve the dispersion of the silicone rubber into the thermoplastic matrices. The coupling agents also appear to promote the adhesion between the thermoplastic matrices and the silicone rubber loadings and thus appear to act as compatibilizers. The method can also be used to effectively blend waste silicone rubbers with virgin silicone rubbers or specially formulated rubbers such as Viton GF for preparing renewed fuser roll coatings.