Borosilicate glass article with low boron content

US11702360B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Malte Grimm · Mitterteich, DE
• Christof Kass · Tirschenreuth, DE
• Rainer Eichholz · Frankfurt, DE

Key dates

• Filing date: Jun 18, 2019
• Grant date: Jul 18, 2023
• Expiry date: Jul 11, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2204/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A chemically temperable borosilicate glass article has a low boron content and a corresponding Na2O content. The articles have good diffusivities and hydrolytical resistance values. When chemically tempered, the borosilicate glass article exhibits a compressive stress CS >400 MPa and a penetration depth DoL >20 μm. A pharmaceutical primary packaging including the borosilicate glass article is also disclosed.