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Gypsum wallboard and method for producing same |
| T977009 |
Gypsum wallboard and method for producing same
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| Patent Drawings: | |
| Inventor: |
Dumas, et al. |
| Date Issued: |
December 5, 1978 |
| Application: |
05/889,693 |
| Filed: |
March 24, 1978 |
| Inventors: |
Dumas; David H. (Wilmington, DE)
Warren; David R. (New Castle County, DE)
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| Assignee: |
Hercules Incorporated (Wilmington, DE) |
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| U.S. Class: |
162/158; 428/478.4; 428/537.7; 428/703 |
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| Abstract: |
disclosed is a paper-covered gypsum board comprised of a gypsum core and a paper cover sheet covering at least one side of said core, the surface of said paper cover sheet adjacent the gypsum core being surface sized with a sizing composition initially comprised of a hydrophobic cellulose reactive sizing agent and a nitrogen-containing condensation product. |
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