ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Preparation of technical mixtures of polyhydric phenols for resin products. I. Difen and pyrocatechol waste

J. Gašperík, K. Zvachova-Huppmannová, and J. Zvach

Slovak Technical University, Bratislava

Abstract: The reactivity of the mixt. (derived from brown coal waste waters) of difen (a mixt. of 75% polyhydric phenols, largely pyrocatechols, and 25% nonphenolic compds.) and pyrocatechol was studied by applying some elements of Krahl's method (CA 51, 15991g). The reaction was obsd. by following changes of n in relation to time. As the met. wt. of the condensate increases, the mols. become insol. and a 2-phase system appears which is indicated by a strong decrease of n.

Full paper in Portable Document Format: 1511-12a909.pdf (in Slovak)

Chemical Papers 15 (11-12) 909–913 (1961)