HYDROPHOBIC COMPOSITE INCLUDING CORE, POLYURETHANE/ ASPHALTFIRST COAT AND HYDROPHOBIC COLLOIDAL OXIDE SECOND COAT, AND METHOD OF PRODUCTION

摘要

HYDROPHOBIC COMPOSITE, METHOD AND COMPOSITION An improved hydrophobic composite is prepared by depositing on a core material an adherent first coat comprising a film-forming polyurethane and, optionally, asphalt, and applying to the thus-coated core material a hydrophobic colloidal oxide, such as hydrophobic fumed silica. The composites are useful in various waterproofing applications, as well as in cleaning up oil spills.