Back to results
US 4,205,035 AGranted
Coal-containing shaped bodies and process for making the same
AssigneeBergwerksverband GmbH
InventorsCarl Kroger, Ingo Romey, Georg Kolling
Life of this patent
Estimating the term…
Abstract
Coal-containing shaped bodies are made by intimately mixing particulate coal with 10 to 30 percent by weight of a polymer. The mixture is shaped by subjecting it to a pressure between about 295 and 3430 newtons per square centimeter. Shaping takes place within a temperature range of 100.degree. to 250.degree. C. The shaped bodies have high compressive and bending strengths and can be precisely dimensioned.
Claims17
A process for making shaped bodies by extrusion or injection molding, the bodies having the form of slabs, sheets, profiles, tubes, pipes or foils,
- the said process comprising forming a mixture between (a) coal particles having a size of at most 200 microns and (b) about 10 to 30% by weight of thermoplastic polymer and copolymer,
- and pressure-shaping said mixture by extrusion or injection molding to its final form at a temperature of about 100.degree. to 250.degree. C.
Dependencies are inferred from the claim text.