Patent ID: 9127115
Filing Date: 2015-09-08
Classification: C07C,C08G,C08L

Abstract:
1. A method for making thermosetting resins from syringaldehyde, comprising: deoxygenating syringaldehyde by conversion to a sulfonate and reaction with a reductive elimination catalyst to produce 3,5-dimethoxybenzaldehyde; reductively coupling said dimethoxybenzaldehyde with at least one dimethoxybenzaldehyde or at least one aromatic aldehyde having a hydroxy group and/or methoxy group in at least one position on said aldehyde by a McMurry reaction or by reductive chemical or electrochemical reactions to produce at least one reductive coupling product; further reducing said reductive product(s) by hydrogenation, chemical reduction or electrochemical reduction followed by demethylating with a hydrolyzing reagent to produce polyphenols; and converting said polyphenols to thermosetting resins selected from the group consisting of epoxy resins, benzoxazine resins, phenolic resins, bismaleimide resins, polyphenylene resins, phthalonitrile endcapped resins, phenylethynyl endcapped resins, and other endcapped resins.