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US 6,379,501 B1Granted
Cellulose products and processes for preparing the same
AssigneeHercules Incorporated
InventorsFushan Zhang, Jimei Tong
Life of this patent
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AssigneeHercules Incorporated
InventorsFushan Zhang, Jimei Tong
Estimating the term…
Processes for preparing cellulose products, such as paper products which include substantially simultaneously or sequentially adding at least one aluminum compound and at least one silicate to a cellulose slurry, to a cellulose slurry such as a paper slurry. In particular, the present invention is directed to processes for preparing the cellulose products, such as paper products which include substantially simultaneously or sequentially adding at least one aluminum compound and at least one monovalent silicate or water-soluble metal silicate complex to a cellulose slurry, such as a paper slurry. Compositions containing at least one aluminum compound and at least one water-soluble metal silicate, and cellulose products, such as paper products containing at least one water-soluble metal silicate complex.
A process for preparing cellulose products which comprises substantially simultaneously adding to cellulose slurry (1) at least one aluminum compound, and (2) at least one water-soluble metal silicate complex that is comprised of at least one reaction product of monovalent cation silicate and divalent metal ions.
An aqueous composition which comprises at least one aluminum compound and at least one water-soluble silicate which is in accordance with the following formula:
A cellulose product comprising cellulose fiber, at least one aluminum compound, and at least one divalent metal silicate complex;
A cellulose product made by a process comprising combining cellulose slurry, at least one aluminum compound, and at least one water-soluble metal silicate, wherein a molar ratio of the at least one aluminum compound to the at least one water-soluble metal silicate, based on Al2O3/SiO2, is from about 0.1 to 10.
Dependencies are inferred from the claim text.