Document vVXD2YORRXXbOJK3aGN95V9rw

United States Patent 4,173,681 Polychloroprene Chlorobutyl Ethylene propylene terpolymer Polyolefin Regenerated Pulverized scraps ACCELERATORS, VULCANIZATION AGENTS Sulfur 5-10 Hexamethylenetetramine FILLERS Lime 20-50 Chalk Marble powder Carbon black Wood flour Magnesium stearate EXAMPLES OF MIXES FOR BACKPLATE % BY WT 12 3 4 7D Asbestos 42 40 Chopped asbestos cloth Resin 88 30% styrene + 70% butadiene 13.7 13 7 Hexamethylenetetramine Sulfur 3 8 3.8 Natural chalk (blanc de champagne) 24 21 Carbon black 5 Zylene solvent 8 5 8.5 Wood flour Magnesium stearate Magnesium oxide Graphite 16 36 7 34 1 2 4 60 30 10 Page 7 of 8 It is to be noted that m the above-indicated compositions, the resins used in the friction material and m the organic backplate must be the same to secure a complete binding between both materials Various modifications can be made by one skilled in the art to the invention described above without departing from the spirit thereof ***** Images View Cart Add to Cart Prev. List Hit List Next List Previous Next Top http //patft uspto gov/netacgi/nph-Parser?Sectl=PT02&Sect2=HITOFF&u=/netahtm1/sea 10/18/2003