Patent ID: 8728349
Filing Date: 2014-05-20
Classification: C08K,G21F

Abstract:
1. A lead-free X-ray shielding rubber compound material, comprising: where, phr equals grams per 100 g of the rubber, wherein the rare earth organic complex is an unsaturated carboxylic rare earth salt, and the rare earth element in the rare earth organic complex is selected from a group consisting of the elements of the lanthanide series except for promethium; wherein the inorganic rare earth compound is selected from the group consisting of rare earth oxide, rare earth chloride, rare earth carbonate, rare earth hydride and rare earth hydroxide, and the rare earth element in the inorganic rare earth compound is selected from the group consisting of 16 kinds of elements of the lanthanide series except for promethium; wherein the tin compound is selected from the group consisting of tin oxide, tin chloride, tin sulfide and tin fluoride; wherein the bismuth inorganic compound is bismuth oxide or bismuth sulfide; wherein the bismuth organic complex is an unsaturated carboxylic bismuth salt; wherein the tungsten compound is selected from the group consisting of tungsten carbide, tungsten sulfide, tungsten salts and tungsten halide; wherein the lead-free X-ray shielding rubber compound material comprises particles having a size of 40-100 nm; and wherein the particles comprise the polymerized rare earth organic complex and the polymerized bismuth organic complex.