Document 3Q0BM73VzMaokXVXbgpMGEYwE

United States Patent' 4,173,681 (polyimide, polyesterimide, polyamide- imide, polybenzimidazole, polycarbon ate, polyphenyl-sulfide, polyamide, polyester) RUBBERS Natural Mix of 30% styrene + 70% Butadiene Nitriles and acrylo-nitriles Butyl Polychloroprene 0-15 Chlorobutyl Ethylene propylene terpolymer Polyolefin Regenerated Pulverized scraps ACCELERATORS, VULCANIZATION AGENTS Sulfur Zinc oxide Magnesium oxide Mercaptobenzothiazole sulfide 1-8 Cumates Alt ax Cobalt naphthenate Hexamethymenetetramine BARIUM SULPHATE (Barites) 10-30 METALS & ALLOYS Lead Copper, zinc, aluminum, brass Antimony, tin 0-25 Bismuth Iron powder, cast iron powder Steel wool METALLIC BY-PRODUCTS Litharge, galena 10-30 Lead silicate Lead carbonate Copper sulfides Copper oxide Antimony sulfide Molybdenum sulfide Iron oxides Iron sulfide Zinc sulfide Aluminum oxide Chromium oxide Titanium oxide FRICTION MODIFIERS AGENTS Organics Resins from cashew nut oil, modified or not 0-10 Graphite Inorganics Silica Aluminum oxides Cyanites Rottenstone Chromium oxides 0-6 Page 5 of 8 http //oatft usdto eov/netaci/nDh-Parser9Sectl=PT02&Sect2=HITOFF&u=/netahtml/sea 10/18/2003