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US 2010/0160528 A1Published application
Glass composition
AssigneeNippon Sheet Glass Co., Ltd.
InventorsKosuke Fujiwara, Akihiro Koyama
Life of this patent
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Abstract
Disclosed is a glass composition having a stable quality, which can be easily obtained. This glass composition can be used as a glass filler to be blended into a polycarbonate resin, and enables to reduce the load imposed on a glass manufacturing apparatus. Specifically, this glass composition contains, in mass %, 50≦SiO2≦60, 8≦Al2O3≦15, 0≦MgO≦10, 5≦CaO<21, 0<SrO+BaO≦25, 10<MgO+SrO+BaO≦30, 0≦Li2O+Na2O+K2O<2, 2<TiO2≦10 and 0≦ZrO2<2 and does not substantially contain B2O3, F, and ZnO.
Claims7
A glass composition comprising, expressed in percent by mass:
- 50≦SiO2≦60;
- 8≦Al2O3≦15;
- 0≦MgO≦10;
- 5≦CaO<21;
- θ5<SrO+BaO≦25;
- 10<MgO+SrO+BaO≦30;
- 0≦Li2O+Na2O+K2O<2;
- 2<TiO2≦10;
- and
- 0≦ZrO2<2;
- wherein the content of SrO is greater than 5 percent by mass and the glass composition is substantially free from B2O3, F, and ZnO.
8 more elements
Dependencies are inferred from the claim text.