Patent ID: 9187591
Filing Date: 2015-11-17
Classification: C07C,C08G,C08L

Abstract:
1. A method for making thermoplastics 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 by reaction with reagents selected from the group consisting of phosgene, triphosgene, diphenylcarbonate, other carbonates, bis(4-chlorophenyl)sulfone, other functionalized sulfones, diacid chlorides, phthalic acids, formaldehyde, other aldehydes, and epichlorohydrin to produce thermoplastics selected from the group consisting of polysulfones, polyesters, polyester-styrene polymers, polyarylates, polycarbonates, and any combination thereof.