Transparent polyvinyl butyral sheet and process for the manufacture thereof

US4287107A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans D. Hermann · Bad Soden am Taunus, DE
• Albrecht Harreus · Ludwigshafen, DE

Key dates

• Filing date: Oct 25, 1979
• Grant date: Sep 1, 1981
• Expiry date: Oct 25, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/3163
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The tendency to blocking of polymer sheets can be reduced by means of anti-blocking agents. Suitable anti-blocking agents in transparent polyvinyl butyral sheets are especially montanic acid esters, which do not adversely affect the adhesion of the sheet to glass. The polyvinyl butyral sheets are used as interlayers of laminated glass (safety glass).