Patent ID: 7303722

Claim:
A method of making a sintered body comprising one or more hard constituents in a binder phase by injection molding or extrusion technique comprising mixing by wet milling of powders forming the hard constituents and binder phase with stearic acid to form a slurry, drying the slurry formed into a powder, mixing the powder with a binder system comprising 30-70 wt % poly(ethylene-co-vinylacetate), balance (Polyethylene)-blend-(Poly(oxy-1 ,2-ethanediyl)-alpha-hydro-omega-hydroxy)-based wax, into a feedstock with a solids loading of 0.51 <γ<0.53, calculated using the equation: γ = ρ f - ρ b ρ s - ρ b where ρ s is the density of the material as sintered, ρ b is the density of the binder system and ρ f is the density of the feedstock, measured with a helium pycnometer, molding said feedstock into a body of desired shape in an injection molding machine or extruder, debinding of the obtained body by heating in a furnace in flowing hydrogen, and sintering.