Dry blendable polypropylene composition

The method of compounding an injection moldable dry blended high impact polypropylene composition by mixing together the components of 3 to 21 weight percent of total composition a coblend of ethylene propylene diene monomer rubber and high density polyethylene with said rubber being the major component, 4 to 30 weight percent of total composition a reinforcing filler of mica having at least 60% of its particles in the size range between -40 mesh to +100 mesh, 49 to 93 weight percent of total composition a polypropylene homopolymer in a powder form having a midpoint particle size distribution between 30 to 40 mesh, said particle sizes of mica matching said particle sizes of polypropylene in suca a way that after mixing in a mechanical mixing device with said coblend of ethylene propylene diene monomer rubber and high density polyethylene without melting any of the three components a homogeneous blend is produced suitable for use in an injection molding machine.