Phthalonitriles derived from polyphenols
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United States of America Patent
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Mar 20, 2018
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app pub date -
Mar 30, 2016
filing date -
Apr 23, 2015
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Abstract
A method of making an organic salt comprising: reacting a polyphenol with a base and optionally a dihaloaromatic compound. The polyphenol is resveratrol; dihydroresveratrol; 4,4′-(but-2-ene-1,4-diyl)bis-2-methoxyphenol; 4,4′-(1,4-butane-diyl)bis-2-methoxyphenol; 1-ethyl-2-methyl-3-(4-hydroxyphenyl)-5-hydroxyindane; 4,4′-(ethane-1,1-diyl)diphenol; 5,5′-methylenebis(2-methoxy-4-methylphenol); 4,4′-methylenebis(5-isopropyl-2-methylphenol); 4,4′-(1-ethyl-2-methyl-1,3-propanediyl)bisphenol; or 5,5′-(ethane-1,1-diyl)bis(2-methoxy-4-methylphenol. The dihaloaromatic compound if present comprises a carbonyl group, a sulfonyl group, a sulfinyl group, or a phosphoryl group. There is a molar excess of the hydroxy groups of the polyphenol relative to halo groups of the dihaloaromatic compound if present. The corresponding phthalonitrile monomers and thermosets made from the organic salts are disclosed.
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