Importance

Loading Importance Indicators...

Abstract

An ultraviolet/infrared absorbent low transmittance glass is formed of a base glass and colorants. The base glass contains 65 to 80 wt. % SiO.sub.2 ; 0 to 5 wt. % Al.sub.2 O.sub.3 ; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is between 5 and 15 wt. %; 10 to 18 wt. % Na.sub.2 O; 0 to 5 wt. % K.sub.2 O wherein a total amount of Na.sub.2 O and K.sub.2 O is in a range of 10 and 20 wt. %; and 0 to 5 wt. % B.sub.2 O.sub.3. The colorants contains more than 1.2 wt. % and not more than 1.5 wt. % total iron oxide (T-Fe.sub.2 O.sub.3) expressed as Fe.sub.2 O.sub.3 ; equal to or more than 0.003 wt. % and less than 0.015 wt. % CoO; 0.0009 to 0.005 wt. % Se; 0.0005 to 0.05 wt. % NiO; and 0 to 0.2 wt. % of TiO.sub.2, wherein FeO expressed as Fe.sub.2 O.sub.3 is between 15 and 50 wt. % of T-Fe.sub.2 O.sub.3. The ultraviolet/infrared absorbent low transmittance glass has a bronze or gray color shade, low visible light transmittance, low solar energy transmittance and low ultraviolet transmittance, so that it is useful for a privacy protecting glass in a rear window of a vehicle.

Loading the Abstract Image...

First Claim