Binding agents

US5254639A · kind A · utility

Assignee

• Rutgerswerke Aktiengesellschaft · DE

Inventors

• Arno Gardziella · Witten, DE
• Achim Hansen · Zug, CH
• Stephan Schröter · Essen, DE
• Josef Suren · Haaren, DE

Key dates

• Filing date: Oct 26, 1992
• Grant date: Oct 19, 1993
• Expiry date: Oct 26, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/699
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A binding agent for molded bodies and molding compositions produced by prereacting a mixture of 5 to 60% by weight of lignin or a lignin fraction produced by the Organosolv process and 40 to 95% by weight of a phenol novolac resin and subjecting the latter to high shear forces in a kneader or extruder and optionally mixing the same with a curing agent useful in molding compositions and high temperature-stable molded products such as refractory products, friction coatings, textile fleeces and carbon or graphite materials.