Fused quartz tubing for pharmaceutical packaging

US9919948B2 · kind B2 · utility

Assignee

• Momentive Performance Materials GmbH · US

Inventors

• Kipyung Ahn · Solon, US
• Guangjun Xu · Mayfield Heights, US
• Martin Panchula · University Heights, US
• Samuel Conzone · New York, US
• Tianjun Rong · Shanghai, CN
• Konstantin S. Zuyev · Grafton, US
• Yen Zhou · Gates Mills, US

Key dates

• Filing date: Jun 8, 2016
• Grant date: Mar 20, 2018
• Expiry date: Jun 8, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/131
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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.