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US 9,283,732 B2Granted
Gypsum plaster board and a method for producing a gypsum plaster board
AssigneeKnauf Gips KG
InventorsHans-Ulrich Hummel, Lothar Scheller, Dietmar Stich
Life of this patent
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Abstract
Gypsum plaster board, containing a gypsum matrix and 0.1 to 10% by weight carbon particles, wherein the particle size (d50) of the carbon particles ranges from 0.5 to 4 mm.
Claims13
A gypsum plaster board comprising:
- a gypsum matrix and
- from 0.1 to 10% by weight of carbon particles, wherein the particle size (d50) of the carbon particles is within a range of from 0.5 to 4 mm, and wherein said carbon particles are at least two different carbon particles selected from the group consisting of scraps of graphite foil, expanded graphite in expanded form, amorphous graphite, and natural graphite, and wherein the gypsum matrix additionally contains from 1 to 10% by weight of calcium carbonate with a particle size less than 300 μm.
Dependencies are inferred from the claim text.