Bronze-tinted or grey-tinted soda lime silicate glass
US5656560A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 6, 1994 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Apr 6, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C4/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a bronze-tinted or grey-tinted soda lime silicate glass, in particular for the manufacture of flat glass by the casting process or by the float process, with a basic composition for the soda lime silicate glass of: ______________________________________ SiO.sub.2 : 66-74 weight % Al.sub.2 O.sub.3 : 0-3 weight % TiO.sub.2 : 0-0.15 weight % CaO: 7-12 weight % MgO: 2-6 weight % Na.sub.2 O: 10-15 weight % K.sub.2 O: 0-3 weight % BaO: 0-0.04 weight % SO.sub.3 : 0.1-0.4 weight % ______________________________________ The invention resides in the fact that it contains the following colorants additives: ______________________________________ Fe.sub.2 O.sub.3 : 0-0.45 weight % V.sub.2 O.sub.5 : 0.0-0.5 weight % MnO.sub.2 : 0.5-2 weight % NiO: 0.0-0.05 weight % CuO: 0.0-0.1 weight % CoO: 0.0-0.008 weight % ______________________________________ the sum of the weight percentages of the constituents forming the soda lime silicate glass being 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.