Fire-resistant glazing and method of making same

US5223313A · kind A · utility

Assignee

• Saint-Gobain Vitrage International · FR

Inventors

• Gerhard Holzer · Aachen, DE
• Udo Gelderie · Stolberg, DE

Key dates

• Filing date: Jan 22, 1991
• Grant date: Jun 29, 1993
• Expiry date: Jan 22, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24777
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In a fire-resistant glazing consisting of at least two parallel glass panes held apart from one another, between which is disposed a layer of a hydrogel, the aqueous phase of which contains a dissolved salt, the solid phase of the hydrogel consists of the polymerized compound 2-hydroxy-3methacryloxypropyltrimethylammonium chloride.