Patent ID: 8940827
Filing Date: 2015-01-27
Classification: C08J,C08K

Abstract:
1. A lead-free, non-toxic composite material, the composite material comprising: a thermosetting polymer; a heavy particulate filler comprising a metal having an average particle size in a range between above 0.1 micron and 15 microns, the heavy particulate filler selected from a group consisting of tungsten, osmium, uranium, iridium, platinum, gold, molybdenum, tantalum, hafnium, thallium, palladium, ruthenium, rhodium, silver and combinations thereof; and a light particulate filler having an average particle size in a range between above 0.1 micron and 15 microns, the light particulate filler selected from a group consisting of barium, barium sulfate, barium carbonate, barium hydroxide, barium oxide, tin, tin oxide, tin dioxide, bismuth, bismuth oxide, copper, copper oxide, iodine, zirconium, zirconium dioxide, nickel, nickel oxide and combinations thereof, wherein the light particulate filler has a specific gravity that is less than a specific gravity of the heavy particulate filler.