Anti-fire glazing

US4983464A · kind A · utility

Assignee

• Saint-Gobain Vitrage · FR

Inventors

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

Key dates

• Filing date: Dec 30, 1988
• Grant date: Jan 8, 1991
• Expiry date: Dec 30, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31649
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An anti-fire glazing composed of two sheets of glass maintained separated by a sealed intermediate peripheral frame, between which an aqueous solution containing a dissolved salt and a gelling agent has been placed. After filling, the solution is transformed into an aqueous gel, the aqueous phase of which contains the salt in solution, and the solid phase of which is a polymer. The gelling polymer is a cross-linked polyvinyl alcohol. A dialdehyde is used as the cross-linking agent.