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Conversion of technical mixtures of polyhydric phenols into resinous products. IV. The effect of melamine on the condensation of diphene and pyrocatechol residues with formaldehyde in the presence of an alkali as catalyst

J. Gašperík, K. Zvachová-Huppmanová, and J. Zvach

Slovak Technical University, Bratislava

 

Abstract: The temp. relation of condensation reactions at 85° of diphene and pyrocatechol residues with HCHO is described. Melamine in an amt. of > 1.0% based on the amt. of the polyphenol component acts as an accelerator for the condensation in the presence of alkalies; in an amt. <1.0%, it accelerates selectively the formation of poly(phenol alcs.).

Full paper in Portable Document Format: 167a516.pdf (in Slovak)

 

Chemical Papers 16 (7) 516–525 (1962)

Monday, November 11, 2019

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