Process for lightening plasterboards
US7220373B2 · kind B2 · utility
5Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2002 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Sep 15, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B24/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for the manufacture of plasterboards exhibiting a core density of less than 0.77 comprising the stages of the formation of a foam from water and a surfactant composed of at least one alkyl sulphate of formula H(CH2)nOSO3−M+, in which n is a number between 6 and 16, M is a monovalent cation and the mean number of carbon atoms nm is from 9 to 10, and the introduction of the foam obtained into a plaster slurry, characterized in that the amount of surfactant introduced does not exceed 0.32 g/l of plaster slurry. Application to the manufacture of lightened plasterboards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.