Binding agents
AssigneeRutgerswerke Aktiengesellschaft
InventorsArno Gardziella, Achim Hansen, Stephan Schroter, Josef Suren
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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.
Claims15
A binding agent for molded bodies and molding compositions produced by prereacting a mixture of 5 to 60% by weight of sulfur-free ligning or a ligning fraction produced by the Organosolv process having a means molecular weight of 800 to 4000 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.
Dependencies are inferred from the claim text.