Lignin derivatives, molded products using the same and...

Chemistry: natural resins or derivatives; peptides or proteins; – Lignins or derivatives – Compound which includes phenolic hydroxy or oxygen...

Reexamination Certificate

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C524S072000

Reexamination Certificate

active

06841660

ABSTRACT:
The present invention provides a process for producing novel lignin derivatives, which comprises using a lignophenol derivative containing a diphenylpropane unit formed by binding a carbon atom at an ortho-position relative to a phenolic hydroxyl group of a phenol derivative to a carbon atom at a benzyl-position of a phenylpropane fundamental unit of lignin, and binding an oxygen atom of the hydroxyl group and a β-positional carbon atom under alkali conditions under which the hydroxyl group can dissociate, to obtain an arylcoumaran derivative containing an arylcoumaran unit in which a coumaran skeleton is bound to an aromatic ring of lignin.

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M. Maeda, et al., “Construction of a Recyclable Formed Body by Mixing a Lignophenol Derivative with Cellular Fibers,” Nihon Mokuzai Gakkai Chubu Shibu Taikai, pp. 52-53 (Oct. 16, 1995) (with English translation).

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