Dark gray, infrared absorbing glass composition and coated glass for privacy glazing

Abstract

Abstract A neutral, dark gray, soda-lime-silica glass having luminous transmittance less than 35 percent, infrared transmittance less than 20 percent, and total solar energy transmittance less than 22 percent (all at 3.9 millimeter thickness) is produced with colorants consisting essentially of 1.0 to 2.2 percent by weight total iron, at least 0.20 percent FeO, 0.01 to 0.03 percent CoO, and 0.0005 to 0.005 percent Se. The flat glass product having such a composition is particularly suitable for use as privacy glazing. The use of the glass as a substrate for a reflectively coated product is also disclosed. A low transmittance, reflective coated article is disclosed comprising a soda-lime-silica glass substrate having luminous transmittance less than 35 percent, infrared transmittance less than 20 percent, and total solar energy transmittance less than 22 percent (all at 3.9 millimeter thickness) and a metal oxide coating having a luminous reflectance not more than 25 percent from the coated surface, and not more than 8 percent from the uncoated surface. The low transmittance coated glass product is particularly suitable for use as privacy glazing.

Inventors

• 👤 Joseph A. Gulotta
• 👤 John F. Krumwiede
• 👤 Luke A. Kutilek
• 👤 Anthony V. Longobardo
• 👤 Robert B. Heithoff

Bibliographic Details