Method of edge-sealing gypsum board for clean room quality
US6468632B2 · kind B2 · utility
4Cited by
16References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Dec 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31996
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for coating the sawed edges of gypsum wallboard to prevent dusting of gypsum particles in clean rooms. The method includes applying a water-dispersible polymers to the sawed edges of gypsum wallboard. The polymer forms a water-insoluble salt through an ion exchange with the calcium found in gypsum wallboard. The result is a tough, tack free, fast-drying coating that substantially reduces the levels of airborne gypsum particles that come from the sawed edges of gypsum wallboards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.