Abstract
In 1925 in their famous article “Phenol Resins and Resinoids”, L. H. Baekeland and H. L. Bender published an opinion that aldehyde reacts with phenol first for forming acetal, which then rearranges to dioxydiphenylmethane. In spite of their enthusiastic investigation of 68 literatures and their own experiments, their opinion has often been forgotten by many phenolic resin chemists. So it would be very important to-day to study the background of their opinion by re-examining of the historical literatures and their own article. In the present paper the articles, pulished during 1872-1887, by A. v. Baeyer, E. Jager, ter Meer, R. Fabinyi, A. Steiner, W. Trzcinski, A. Michael, L. Claisen and A. Claus are abstracted and subjected to discussion.
