Injection moldable ceramic and metallic compositions and method of preparing the same

An injection moldable composition suitable for forming ceramic or metallic greenbodies comprises in combination an inorganic or metallic filler in an amount of from 63 volume percent to 92 volume percent, a binding organic matrix resin, and an organosilane processing reagent represented by the general formula: SiX1X2X3X4 wherein at least one of X1, X2, X3 or X4 is an unfunctionalized alkyl or alkenyl group having 10 to 35 carbon atoms and at least one of X1, X2, X3 or X4 is an alkoxy group or halide, such that the moldable composition exhibits a low initial mixing torque upon mechanical agitation. These compositions offer excellent advantage in processibility using conventional mixing and molding equipment. The filler may be a metal, silicon, oxide of aluminium, titanium or zirconium, nitride of silicon, aluminium or silicon carbide. The matrix may be polyolefin, polyamide, polyester, polycarbonate or polyacetal. The silane may be octadecyl triethoxysilane, octadecyl dimethylmethoxysilane or octadecyl trichlorosilane.