Multilayered film made of (meth)acrylate copolymer and polycarbonate

US7585565B2 · kind B2 · utility

Assignees

• Roehm GmbH · DE
• Senoplast Klepsch & Co., GmbH · AT

Inventors

• Klaus Schultes · Wiesbaden, DE
• Michael Wicker · Seeheim-Jugenheim, DE
• Klaus Albrecht · Mainz, DE
• Mona Rueppel · Weener, DE
• Gabriele Dassinger · Riedstadt, DE
• Eric Reinheimer · Groß-Zimmern, DE
• Johann Kappacher · Piesendorf, AT
• Andreas Hollebauer · Wiener Neustadt, AT

Key dates

• Filing date: Sep 15, 2004
• Grant date: Sep 8, 2009
• Expiry date: Nov 15, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a multilayered film comprising at least one upper layer a), a middle layer b) made of (meth)acrylate copolymer, and a supporting layer c) made of polycarbonate. Upper layer a) contains a light-stability agent and is made of a (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23° C. The middle layer b) contains a colorant and, optionally, a light-stability agent and is made from an identical or different (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23° C., and the supporting layer c) is made of polycarbonate that, optionally up to 30% by weight of the material of the layers, can contain a) and b). The invention also relates t…