Ultraviolet/infrared absorbent low transmittance glass
First Claim
1. An ultraviolet/infrared absorbent low transmittance glass consisting of a base glass and colorants, said base glass comprising:
- 65 to 80 wt. % SiO2;
0 to 5 wt. % Al2O3;
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. % Na2O;
0 to 5 wt. % K2O, wherein a total amount of Na2O and K2O is between 10 and 20 wt. %; and
0 to 5 wt. % B2O3, and said colorants comprising;
more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3;
0.001-0.030 wt. % CoO; and
0.003-0.2 wt. % NiO.
1 Assignment
0 Petitions
Accused Products
Abstract
The ultraviolet/infrared absorbent low transmittance glass has a grayish green color shade, low visible light transmittance, low total solar energy transmittance, and low ultraviolet transmittance, and is suitable for a rear window of a vehicle and capable of protecting privacy. The glass is formed of a base glass including: 65 to 80 wt. % SiO2; 0 to 5 wt. % Al2O3; 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. % Na2O; 0 to 5 wt. % K2O, wherein a total amount of Na2O and K2O is between 10 and 20 wt. %; and 0 to 5 wt. % B2O3, and colorants including: more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3; 0.001 to 0.0180 wt. % CoO; and 0.003 to 0.2 wt. % NiO.
23 Citations
10 Claims
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1. An ultraviolet/infrared absorbent low transmittance glass consisting of a base glass and colorants, said base glass comprising:
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65 to 80 wt. % SiO2;
0 to 5 wt. % Al2O3;
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. % Na2O;
0 to 5 wt. % K2O, wherein a total amount of Na2O and K2O is between 10 and 20 wt. %; and
0 to 5 wt. % B2O3, and said colorants comprising;
more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3;
0.001-0.030 wt. % CoO; and
0.003-0.2 wt. % NiO. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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- Resources
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Current AssigneeNippon Sheet Glass Company Limited
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Original AssigneeNippon Sheet Glass Company Limited
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InventorsSeto, Hiromitsu, Nagashima, Yukihito, Yoshii, Shigekazu
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current501/71
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CPC Class CodesC03C 3/087 containing calcium oxide, e...C03C 4/02 for coloured glassC03C 4/082 for infrared absorbing glassC03C 4/085 for ultraviolet absorbing g...
