Abstract
During 1939-1941 A.Zinke and F.Hanus published the famous papers on the heat-hardening reaction of phenolic resins. They synthesized many new phenol alcohols as the model of the resins and estimated the amount of H2O and CH2O evolved during heating. But no one has ever clarified the mechanism of the reaction from their data, because the amount of total H2O is too higher than that of CH2O.
The present author attended to the following reaction, postulated by H.v.Euler;
Phenol alcohol→diphenylmethane + CH2O + H2O
and assumed that CH2O and H2O, each other, are equal molarity.
Then he calculated Δ H2O i.e. the difference between total H2O and CH2O and plotted ΔH2O and number of phenolic nuclei (1-3), obtaining one of the solutions.
