Soda-lime glass containing vanadium

US5346768A · kind A · utility

Assignee

• Flachglas Aktiengesellschaft · DE

Inventors

• Ernst Winter · Hamburg, DE
• Friedrich Marwan · Idar-Oberstein, DE
• Joachim Bretschneider · Idar-Oberstein, DE
• Hubert Drexler · Regensburg, DE

Key dates

• Filing date: Apr 8, 1992
• Grant date: Sep 13, 1994
• Expiry date: Apr 8, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31616
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A soda-lime glass containing vanadium which can be produced by the float process with high UV absorption for wavelengths below 350 nm. The glass comprises 70 to 74 weight % SiO.sub.2, 0 to 2 weight % Al.sub.2 O.sub.3, 0.1 weight % or less Fe.sub.2 O.sub.3, 0 to 0.15 weight % TiO.sub.2, 7.5 to 10 weight % CaO, 3.5 to 5.4 weight % MgO, 12 to 15 weight % Na.sub.2 O, 0 to 1 weight % K.sub.2 O, 0 to 0.02 weight % BaO, 0.1 to 0.3 weight % SO.sub.3, 3 to 7 weight ppm CoO and 0.1 to 0.3 weight % V.sub.2 O.sub.5.