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|Section2= |Section3= }} Diphenolic acid is a carboxylic acid with molecular formula C17H18O4. Its IUPAC name is 4,4-bis(''p''-hydroxyphenyl)pentanoic acid, and it can be prepared by the condensation reaction of phenol with levulinic acid in the presence of hydrochloric acid. The equation for this synthesis is: :2 C6H5OH + CH3C(O)CH2CH2COOH → CH3C(''p''-C6H4OH)2CH2CH2COOH + H2O Diphenolic acid is a solid at room temperature, melting at 168–171 °C and boiling at 507 °C. According to its MSDS, diphenolic acid is soluble in ethanol, isopropanol, acetone, acetic acid, and methyl ethyl ketone, but insoluble in benzene, carbon tetrachloride, and xylene. Diphenolic acid may be a suitable replacement for bisphenol A as a plasticizer.〔(Diphenolic acid ), National Toxicology Program〕 Diphenolate esters have been used to synthesize epoxy resins as a replacement for the digylcidyl ether of bisphenol A.The digylcidyl ethers of n-alkyl diphenolate esters have similar thermomechanical properties to the digylcidyl ether of bisphenol A when cured, but the viscosity and glass transition temperature vary as a function of the ester length.〔Maiorana, A., Spinella, S., Gross, R.A., Biomacromolecules, 2015, doi 10.1021 ()〕 Diphenolate esters have also been used to synthesize polycarbonates with a potential for water solubility.〔Ruifeng Zhang and J. A. Moore, Macromolecular Symposia,199 (Polycondensation 2002), 375-390 (2003)〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Diphenolic acid」の詳細全文を読む スポンサード リンク
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