Composition for colored glass intended for the manufacture of glazing panes
US5985780A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/905
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A colored glass composition, containing the following oxides within the following limits by weight: ______________________________________ SiO.sub.2 64 to 75% Al.sub.2 O.sub.3 0 to 5% B.sub.2 O.sub.3 0 to 5% CaO 5 to 15% MgO 0 to 5% Na.sub.2 O 10 to 18% and K.sub.2 O 0 to 5% ______________________________________ and as coloring agents: ______________________________________ Fe.sub.2 O.sub.3 (total iron) 0.45 to 2.5% with FeO content representing from 16 to 55% ______________________________________ of the total iron content expressed in the form of Fe.sub.2 O.sub.3 ______________________________________ CoO 0.001 to 0.02% Se 0 to 0.0009% ______________________________________ wherein the glasses have a total energy transmission factor (T.sub.E) less than the light transmission factor under illuminant A (TL.sub.A), the factor T.sub.E being from 10 to 48% and the factor TL.sub.A from 20 to 60% for a thickness of 3.85 mm, the colored glass composition having an excitation purity equal to or less than 7.6%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.