Title:
UV ABSORBING GRAY GLASS COMPOSITION
Document Type and Number:
WIPO Patent Application WO2007030354
Kind Code:
A9
Abstract:
A novel glass composition is disclosed. The glass composition includes a base glass composition made up of SiO2 from 65 to 75 weight percent, Na2O from 10 to 20 weight percent, CaO from 5 to 15 weight percent, MgO from 0 to 5 weight percent, Al2O3 from 0 to 5 weight percent, K2O from 0 to 5 weight percent, B2O3 0 to 5%, and MnO2 0 to 0.5%, and a colorant and property modifying material portion made up of total iron up to 0.65 weight percent, Se ranging from 2 PPM to 10 PPM , at least one UV absorber selected from CeO2, V2O5, TiO2 and MoO3, CoO up to 20 PPM, and Cr2O3 up to 75 PPM, wherein the glass composition has a redox ratio ranging from 0.2 to 0.6.
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Inventors:
SHELESTAK LARRY J (US)
ARBAB MEHRAN (US)
SMITH DENNIS G (US)
ARBAB MEHRAN (US)
SMITH DENNIS G (US)
Application Number:
PCT/US2006/033524
Publication Date:
May 29, 2008
Filing Date:
August 29, 2006
Export Citation:
Assignee:
PPG IND OHIO INC (US)
International Classes:
C03C3/087; C03C4/08
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