Green glass composition
AssigneeAutomotive Components Holdings, LLC
InventorsEdward Nashed Boulos, James Victor Jones
Life of this patent
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Abstract
The present invention is a green soda-lime-silica glass composition. The composition comprises 68 to 75% SiO2, 10 to 18% Na2O, 5 to 15% CaO, 0 to 10% MgO, 0 to 5% Al2O3, and 0 to 5% K20, where CaO+MgO is 6 to 15% and Na2O+K20 is 10 to 20%, and colorants comprising: 0.3 to 0.8 wt. % total iron as Fe2O3 wherein the ratio of FeO/total Fe as Fe2O3 is 0.35 to 0.62; 0.05 to 0.5 wt. % manganese compound as MnO2; 0 to 0.1 wt. % titanium oxide as TiO2; and 0 to 1 wt. % cerium oxide as CeO2. The colored glass has the following spectral properties at 4.0 mm. thickness: 65 to 81% light transmittance using Illuminant A (LTA) and using Illuminant C has a dominant wavelength of 494 to 555 nanometers with an excitation purity of 2 to 9%.
Claims12
A colored glass for use in a motor vehicle having a base and a colorant, wherein composition of the colorant by weight of the colored glass consists essentially of:
- 0.3 to 0.65 wt. % of total iron as Fe2O3, wherein ratio of FeO to total iron as Fe2O3 is in a range of 0.37 to 0.65;
- 0.05 to 0.8 wt. % of manganese oxide as MnO2;
- and
- wherein the colored glass at 4 mm. control thickness has a light transmittance using illuminant A in a range of 65% to 81%, an infrared transmittance in the range of 10% to 32%, an ultraviolet transmittance in the range of 39% to 60%, an excitation purity in a range of 2% to 9%, and a dominant wavelength using illuminant C in a range of 494 to 555 nanometers.
A colored glass for use in a motor vehicle having a base and a colorant, wherein composition of the colorant by weight of the colored glass comprising:
- 0.3 to 0.65 wt. % of total iron as Fe2O3, wherein ratio of FeO to total iron as Fe2O3 is in a range of 0.37 to 0.65;
- 0.05 to 0.8 wt. % of manganese oxide as MnO2;
- and
- wherein the colored glass at 4 mm. control thickness has a light transmittance using illuminant A in a range of 65% to 81%, an infrared transmittance in the range of 10% to 32%, an ultraviolet transmittance in the range of 39% to 60%, an excitation purity in a range of 2% to 9%, and a dominant wavelength using illuminant C in a range of 494 to 555 nanometers;
- wherein a color of the colored glass is defined by a chromatography coordinates inside the polygon ABCDA, wherein the chromaticity coordinates are:
- x
- y
- A
- 0.284
- 0.321
- B
- 0.301
- 0.317
- C
- 0.307
- 0.326
- D
- 0.314
- 0.352
- and the polygon ABCDA represent the full scope of the color space of the present invention.
Dependencies are inferred from the claim text.