Lightweight building material board
US5256222A · kind A · utility
62Cited by
20References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Aug 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A lightweight wallboard having a density in the range of 10 pcf to 30 pcf and comprised of a faced layer of expanded siliceous inorganic particles, such as expanded perlite, bonded together by inorganic binder, such as sodium silicate. The board is made by depositing a mixture of particles, binder and water onto a moving web of facing material, contacting the mixture with an upper moving web of facing material, compacting the mixture to the desired shape and density and drying the resulting board. Fire resistant and water repellent versions of the formula are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.