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AssigneeMomentive Performance Materials Inc.
InventorsKipyung Ahn, Guangjun Xu, Martin Panchula, Samuel Conzone, Tianjun Rong, Konstantin S. Zuyev, Yen Zhou
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A high silica glass composition comprising about 92 to about 99.9999 wt. % SiO2 and from about 0.0001 to about 8 wt. % of at least one dopant selected from Al2O3, CeO2, TiO2, La2O3, Y2O3, Nd2O3, other rare earth oxides, and mixtures of two or more thereof. The glass composition has a working point temperature ranging from 600 to 2,000° C. These compositions exhibit stability similar to pure fused quartz, but have a moderate working temperature to enable cost effective fabrication of pharmaceutical packages. The glass is particularly useful as a packaging material for pharmaceutical applications, such as, for example pre-filled syringes, ampoules and vials.
A silica glass composition comprising about 92 to about 99.9999 wt. % SiO2 and about 0.0001 to about 8 wt. % of a dopant selected from Al2O3, GeO2, Ga2O3, CeO2, ZrO2, TiO2, Y2O3, SrO, BaO, a rare earth oxide, or mixtures of two or more thereof, wherein a fused glass article formed from the composition has a total extractable metal concentration of about 8 mg/L or less when subjected to HCl digestion, the total extractable metal concentration being represented by the total concentration of Al, B, Na, Ca, K, Li, Ba, and Mg extracted upon HCl digestion.
A glass article comprising a silica glass composition comprising about 92 to about 99.9999 wt. % SiO2 and about 0.0001 to about 8 wt. % of a dopant selected from Al2O3, GeO2, Ga2O3, CeO2, ZrO2, TiO2, Y2O3, SrO, BaO, a rare earth oxide, or mixtures of two or more thereof, the article having a total extractable metal concentration of about 8 mg/L or less when subjected to HCl digestion, the total extractable metal concentration being represented by the total concentration of Al, B, Na, Ca, K, Li, Ba, and Mg extracted upon HCl digestion;
A pharmaceutical packaging container comprising a silica glass composition comprising about 92 to about 99.9999 wt. % SiO2 and about 0.0001 to about 8 wt. % selected from Al2O3, GeO2, Ga2O3, CeO2, ZrO2, TiO2, Y2O3, SrO, BaO, a rare earth oxide, or mixtures of two or more thereof.
Dependencies are inferred from the claim text.