Glazing laminates

US4925734A · kind A · utility

Assignee

• Saint-Gobain Vitrage · FR

Inventors

• Heinrich Agethen · Herdecke, DE
• Paul Gesenhues · Herdecke, DE
• Helmer Radisch · Aachen, DE
• Otto Jandeleit · Alsdorf, DE
• Wolfgang Schafer · Düren, DE

Key dates

• Filing date: May 4, 1988
• Grant date: May 15, 1990
• Expiry date: May 4, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31601
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An integument which contributes to the maintenance of surface integrity is disclosed, particularly a sheet for use in preparing laminates, such as vehicle windshields, in which an energy absorbing ply, for example, a ply of poly(vinyl butyral), is sandwiched between two glass plies, the sheet of this invention being applied to an exposed surface of one of the glass plies and having one surface layer comprising a thermoplastic polyurethane capable of adhering to a glass or plastic substrate and the other surface layer comprising a thermoset polyurethane having antilacerative, self-healing and anti-ablative properties; there is further disclosed the manufacture and application of such a sheet as a ply facing the interior of a vehicle, thereby forming a windshield the inwardly exposed surface of which comprises a thermoset polyurethane which protects the vehicle occupants from facial lacerations caused by windshield impact and which has self-healing properties.