Polymeric materials which can be inscribed by laser light

US5053440A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Ralf Schueler
• Christian Herkt-Maetzky · Haltern, DE
• Wilfried Bartz · Marl, DE

Key dates

• Filing date: Apr 5, 1990
• Grant date: Oct 1, 1991
• Expiry date: Apr 5, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/146
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Molding compounds, semi-finished products and finished articles comprising polymeric material which can be inscribed by means of laser light. The products contain an additive which is virtually colorless in the visible spectral range and produces a marking with high color contrast in the visible spectral range under the effect of laser light outside the visible range.