Copper red frits and pigments comprising silica and at least one of cupric oxide and cuprous oxide

US9334189B2 · kind B2 · utility

Assignee

• Ferro Corporation · US

Inventors

• Enos A. Axtell, III · Seven Hills, US
• George E. Sakoske · Washington, US
• Andreas Schulz · Karben, DE
• Juergen Hanich · Frankfurt, DE
• Lothar Heck · Dreieich, DE
• Dietrich Speer · Hanau, DE
• Martin Baumann · Hartenstein, DE

Key dates

• Filing date: Nov 7, 2014
• Grant date: May 10, 2016
• Expiry date: Nov 7, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This invention relates to lead free and cadmium free copper-containing glass frits that can be used as pigments to color other glass frits or to impart color to solid substrates such as glass, ceramic or metals, or to impart color to a thermoplastic mass. The compositions comprise silica, alkali metal oxides, alkaline earth metal oxides, tin oxide and copper oxide. The resulting compositions can be used to decorate and protect automotive, beverage, architectural, pharmaceutical and other glass substrates, generally imparting a red color.