Ultraviolet/infrared absorbent glass
US6468934B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2001 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Feb 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/256
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An ultraviolet/infrared absorbent glass is formed of base glass, and colorants. The base glass includes 65 to 80 wt. % SiO2; 0 to 5 wt. % Al2O3; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO; 10 to 18 wt. % Na2O; 0 to 5 wt. % K2O; 5 to 15 wt. % a total amount of MgO and CaO; 10 to 20 wt. % a total amount of Na2O and K2O; 0.05 to 0.3 wt. % SO3; and 0 to 5 wt. % B2O3. The colorants are formed of 0.35 to 0.55 wt. % the total iron oxide (T-Fe2O3) expressed as Fe2O3; 0.08 to 0.15 wt. % FeO; 0.8 to 1.5 wt. % CeO2 and 0 to 1.5 wt. % TiO2. FeO expressed as Fe2O3 is equal to or more than 20 wt.% and less than 27 wt. % of T-Fe2O3. The glass has high visible light transmittance and light greensih color shade so that it is useful for a window of a vehicle and a building.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.