US5380685A
Expired / Lapsed
US
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Bronze-colored infrared and ultraviolet radiation absorbing glass
Assignee: Central Glass Co Ltd
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Filing: 1993-03-16
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Granted: 1995-01-10
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Expires: 2013-03-16
Abstract
Abstract An infrared and ultraviolet radiation absorbing glass suitable for use in building and vehicle windows, which comprises, on a weight basis, 68-74% of SiO2, 0.1-3.0% of Al2O3, 8-11% of CaO, 2.0-4.5% of MgO, 11.5-16.0% of Na2O, 0.5-3.0% of K2O, 0.1-0.4% of SO3, 0.10-0.55% of total iron expressed as Fe2O3, 0.2-0.6% of CeO2, 0.3-14 ppm of CoO and 5-20 ppm of Se. In the glass the ratio of ferrous iron to ferric iron is in the range from 0.17 to 0.55. The glass has a bronzy tint and is well balanced in visible light transmittance, infrared radiation absorption and ultraviolet radiation absorption, and a sheet of the glass can be easily tempered by a conventional method.
Inventors
- 👤 Shigeki Morimoto
- 👤 Tadashi Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:51
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C4/08; C03C4/082; C03C4/085
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
86 words
A bronze-colored infrared and ultraviolet radiation absorbing glass comprising a soda lime silica base glass, and consisting essentially of as coloring components, on a weight basis, 0.10-0.55% of total iron expressed as Fe 2 O 3 , 0.2-0.6% of CeO 2 , 0.3-14 ppm of CoO and 5-20 ppm of Se, wherein said total iron includes ferrous iron and ferric iron and the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.17 to 0.55.
Claim 2
Dependent Claim
86 words
A bronze-colored infrared and ultraviolet radiation absorbing glass comprising a soda lime silica base glass, and consisting essentially of as coloring components, on a weight basis, 0.10-0.55% of total iron expressed as Fe 2 O 3 , 0.2-0.6% of CeO 2 , 0.3-14 ppm of CoO and 5-20 ppm of Se, wherein said total iron includes ferrous iron and ferric iron and the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.17 to 0.55.
Claim 3
Dependent Claim
92 words
A glass according to claim 1, wherein said base glass comprises as fundamental components, on a weight basis, 68-74% of SiO 2 , 0.1-3.0% of Al 2 O 3 , 8-11% of CaO, 2.0-4.5% of MgO, 11.5-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.1-0.4% of SO 3 , with provisos that the total of SiO 2 and Al 2 O 3 is from 68-74%, that the total of CaO and MgO is from 11-15% and that the total of Na 2 O and K 2 O is from 12-17%.
Claim 4
Dependent Claim
102 words
A glass according to claim 1, wherein the amount of said total iron expressed as Fe 2 O 3 is in the range from 0.10 to 0.50, the amount of said CoO is in the range from 2 to 14 ppm on a weight basis, and the amount of said Se is in the range from 7 to 18 ppm on a weight basis, with provisos that said total iron includes ferrous iron and ferric iron and that the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.22 to 0.50.
Claim 5
Dependent Claim
129 words
A bronze-colored infrared and ultraviolet radiation absorbing glass comprising a soda lime silica base glass, and consisting essentially of as coloring components, on a weight basis, 0.10-0.55% of total iron expressed as Fe 2 O 3 , 0.2-0.6% of CeO 2 , 0.3-14 ppm of CoO and 5-20 ppm of Se, wherein said total iron includes ferrous iron and ferric iron and the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.17 to 0.55, and wherein said glass at a thickness of 4 mm is not lower than 70% in visible light transmittance with using the standard illuminant A, from 50 to 74% in total solar radiation transmittance and from 15 to 28% in ultraviolet radiation transmittance.
Claim 6
Dependent Claim
129 words
A bronze-colored infrared and ultraviolet radiation absorbing glass comprising a soda lime silica base glass, and consisting essentially of as coloring components, on a weight basis, 0.10-0.55% of total iron expressed as Fe 2 O 3 , 0.2-0.6% of CeO 2 , 0.3-14 ppm of CoO and 5-20 ppm of Se, wherein said total iron includes ferrous iron and ferric iron and the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.17 to 0.55, and wherein said glass at a thickness of 4 mm is not lower than 70% in visible light transmittance with using the standard illuminant A, from 50 to 74% in total solar radiation transmittance and from 15 to 28% in ultraviolet radiation transmittance.
Claim 7
Dependent Claim
33 words
A glass according to claim 4, wherein said total solar radiation transmittance is in the range from 50 to 65%, and said ultraviolet radiation transmittance is in the range from 15 to 25%.
Claim 8
Dependent Claim
32 words
A glass according to claim 5, wherein said glass at a thickness of 4 mm is from 572 to 580 nm in dominant wavelength and from 7 to 9.5 in excitation purity.
Claim 9
Dependent Claim
17 words
A glass according to claim 4, wherein said total solar radiation transmittance is from 55 to 74%.
Claim 10
Dependent Claim
32 words
A glass according to claim 4, wherein said glass at a thickness of 4 mm is from 572 to 581 nm in dominant wavelength and from 3 to 10 in excitation purity.
Claim 11
Dependent Claim
91 words
A bronze-colored infrared and ultraviolet radiation absorbing glass comprising a soda lime silica base glass, and consisting essentially of as coloring components, on a weight basis, 0.13-0.55% of total iron expressed as Fe 2 O 3 , 0.2-0.6% of CeO 2 , 0.15-0.45% of TiO 2 , 0.3-14 ppm of CoO and 5-20 ppm of Se, wherein said total iron includes ferrous iron and ferric iron and the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.17 to 0.55.
Claim 12
Dependent Claim
91 words
A bronze-colored infrared and ultraviolet radiation absorbing glass comprising a soda lime silica base glass, and consisting essentially of as coloring components, on a weight basis, 0.13-0.55% of total iron expressed as Fe 2 O 3 , 0.2-0.6% of CeO 2 , 0.15-0.45% of TiO 2 , 0.3-14 ppm of CoO and 5-20 ppm of Se, wherein said total iron includes ferrous iron and ferric iron and the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.17 to 0.55.
Claim 13
Dependent Claim
79 words
A glass according to claim 9, wherein said glass comprises as coloring components, on a weight basis, 0.35-0.43% of said total iron expressed as Fe 2 O 3 , 0.3-0.6% of said CeO 2 , 0.2-0.4% of said TiO 2 , 0.5-13 ppm of said CoO and 8-10 ppm of said Se, with provisos that the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.20 to 0.30.
Claim 14
Dependent Claim
79 words
A glass according to claim 9, wherein said glass comprises as coloring components, on a weight basis, 0.25-0.35% of said total iron expressed as Fe 2 O 3 , 0.3-0.6% of said CeO 2 , 0.2-0.4% of said TiO 2 , 2-13 ppm of said CoO and 10-14 ppm of said So, with provisos that the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.30 to 0.40.
Claim 15
Dependent Claim
77 words
A glass according to claim 9, wherein said glass comprises as coloring components, on a weight basis, 0.15-0.30% of said total iron expressed as Fe 2 O 3 , 0.3-0.6% of said CeO 2 , 0.2-0.4% of said TiO 2 , 2-13 ppm of said CoO and 11-16 ppm of said Se, with provisos that the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40-0.50.
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