Radiation shielding composition
阅读：493发布：2022-07-26
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1. AS A COMPOSITION OF MATTER, A GAMMA RADIATION SHIELDING MATERIAL CONSISTING ESSENTIALLY OF 55% TO 70% BY WEIGHT OF A PLASTIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYURETHANE, POLYETHYLENE, AND EPOXY, 15% TO 40% BY WEIGHT OF A METAL POWDER SELECTED FROM THE GROUP CONSISTING OF LEAD AND TUNGSTEN, 1% TO 15% BY WEIGHT OF A RESIN PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF TRICHLOROETHYL PHOSPHATE, TRICRESYL PHOSPHATE, CASTON OIL, DIBUTYL PHTHALATE, AND DIOCTYL PHATHALATE, 1% TO 5% BY WEIGHT OF A POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF BENZOYL PEROXIDE, LAUROYL PEROXIDE, AND METHYLENE-BIS (ORTHO-CHLORO-ANILINE), AND SUFFICIIENT INCLUDED AIR SUCH THAT THE COMPOSITION PRESSESSES A DENSITY OF FROM 1.3 TO 1.5 GRAMS PER CUBIC CENTIMETER.
3. IN A PROCESS FOR PRODUCING A RADIATION SHIELDING MATERIAL, THE STEPS COMPRISING ADDING TUNGSTEN POWDER TO A MICTURE OF POLYURETHANE RESIN, PLASTICIZER, AND CATALYST, STIRRING SAID TUNGSTEN POWDER-PLASTIC MIXTURE VIGOROUSLY TO INCORPORATE AIR THEREIN, CURING SAID MIXTURE AT ELEVATED TEMPERATURE, AND FINALLY RECOVERING SAID CURED METAL-PLASTIC MIXTURE.
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