Intermediate product for preparation of lignin polymers and use thereof for production of wood materials
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United States of America Patent
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Aug 28, 2001
Grant Date -
N/A
app pub date -
Oct 25, 1999
filing date -
Jan 14, 1997
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Expired
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Abstract
The invention relates to an intermediate product for the preparation of polymerizates from lignin derivatives obtained from the cellulose industry. The intermediate product is produced by treating the lignin derivatives with enzymes capable of oxidizing phenol in the presence of oxidizing agents. According to the invention the lignin derivatives are subjected to the enzymatic treatment for more than 3 hours in the presence of air, or they are subjected to an enzymatic treatment for more than 10 min, whereby air or oxygen is introduced. The lignin polymers obtained from the polymerization of lignin derivatives performed in the presence of active intermediate products are suited for use in the production of binding agents for wood materials.
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