Polymer moulding materials for producing a partial color change by laser energy, particularly for the production of colored markings

US5576377A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Aziz El Sayed · Leverkusen, DE
• Frank Gerling · Düsseldorf, DE
• Salvatore Messina · Rheda-Wiedenbrück, DE
• Herbert Magerstedt · Moers, DE
• Karsten-Josef Idel · Krefeld, DE
• Edgar Ostlinning · Goldkronach, DE

Key dates

• Filing date: Mar 20, 1995
• Grant date: Nov 19, 1996
• Expiry date: Mar 20, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M5/262
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to colored polymer moulding materials which give rise to colored markings on a dark background with a very high contrast ratio on the absorption of laser energy.