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US 8,686,070 B2Granted
Nanocrystallinecellulose (NCC) in tape joint compound (JC)
AssigneeHercules Incorporated
InventorsKirill N. Bakeev, Thomas J. Podlas
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Abstract
A joint compound with improved crack resistance is formed by combining water, a filler such as calcium carbonate, a latex emulsion binder, a thickening system such as methylhydroxyethyl cellulose, and nanocrystalline cellulose. The nanocrystalline cellulose is provided in an amount effective to reduce the crack formation during drying.
Claims17
A joint compound comprising nanocrystalline cellulose, water, a filler, a binder and a thickener, wherein the amount of the nanocrystalline cellulose is effective to improve crack resistance of the joint compound upon drying;
- wherein the nanocrystalline cellulose has a length to diameter ratio of from about 20 to 200;
- and wherein the diameter of the nanocellulose is less than 60 nanometers.
Dependencies are inferred from the claim text.