Glass compositions with improved chemical and mechanical durability

US9340447B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Paul Stephen Danielson · Dundee, US
• Steven Edward DeMartino · Corning, US
• Melinda Ann Drake · Corning, US
• Robert Michael Morena · Caton, US
• Santona Pal · Corning, US
• Robert Anthony Schaut · Corning, US

Key dates

• Filing date: Apr 30, 2015
• Grant date: May 17, 2016
• Expiry date: Apr 30, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/315
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The embodiments described herein relate to chemically and mechanically durable glass compositions and pharmaceutical packaging formed from the same. According to one embodiment, a glass for pharmaceutical packaging includes from about 70 mol. % to about 80 mol. % SiO2; from about 4 mol. % to about 8 mol. % alkaline earth oxide, the alkaline earth oxide comprising MgO and CaO; X mol. % Al2O3, wherein X is from about 4 to about 8; and Y mol. % alkali oxide comprising non-zero amounts of Na2O and K2O, wherein Y is about 9-15 mol. % and a ratio of Y:X is greater than 1.