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AssigneeInnovative Construction and Building Materials
InventorsChristopher D. Tagge, Jacob Freas Pollock, Lennard Torres, David S. Soane
Estimating the term…
A reinforced wallboard core is prepared from a slurry comprising a mixture of β-calcium sulfate hemihydrate, a cellulose ether additive other than CMC and an amount of water that is sufficient to form a slurry and resulting in a wallboard density of less than 0.8 g/cc. The β-calcium sulfate hemihydrate is hydrated by the water forming a wallboard core reinforced by the cellulose ether additive. The cellulose ether, having a molecular weight of at least about 20,000 and a viscosity grade of at least about 100 cps, is selected to give the reinforced wallboard core improved nail pull resistance and greater flexural strength than unreinforced wallboard of the same density. The reinforced wallboard core may be used for reduced-paper wallboard and/or for lightweight wallboard, for example.
A reinforced wallboard core comprising:
A wallboard core comprising a β-calcium sulfate hemihydrate powder and an aqueous additive solution, wherein the β-calcium sulfate hemihydrate powder is mixed with the aqueous solution, forming a slurry and hydrating the β-calcium sulfate hemihydrate powder, wherein the aqueous additive solution comprises water and an additive dissolved in the water and the additive is of a cellulose ether other than CMC, and the cellulose ether is selected to have both a viscosity grade of at least about 100 cps and a molecular weight of at least about 20,000, the amount of water being selected such that the wallboard core has a density less than 0.8 g/cc.
A process for making a wallboard core comprising:
A process for making a wallboard core comprising:
A reinforced wallboard core comprising:
Dependencies are inferred from the claim text.