Abstract
Recent instrumental analyses were possible to make it clear that resoles consist of polymethylolphenols and that compounds obtained by heating the compounds which are modeled after methylolphenols agree with the results assumed from solid-state 13C-NMR of heat-hardened resole. The reaction mechanisms to form the various products from methylolphenols are assumed as follows ; (i) methylene bond may be formed via quinone methide, (ii) elimination of a methylol from a methylolphenol may belong to the retro-ene reaction or to a fragmentation of β-hydroxyolefin, (iii) formyl group may be formed via quinone methide.
