Laser-markable plastics comprising non-platelet phyllosilicate

US5928780A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Christoph Schmidt · Kriftel, DE
• Peter Reynders · Griesheim, DE
• Sabine Schoen · Darmstadt, DE

Key dates

• Filing date: Jun 21, 1996
• Grant date: Jul 27, 1999
• Expiry date: Jun 21, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2993
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to laser-markable plastics whose feature is that they comprise non-lustrous pigments based on phyllosilicates which have an irregular surface.