Abstract
The insoluble powder like condenastion polymers were prepared from dimethylolurea, N, N′-bis (methoxymethyl)-urea in acidic solution by regulating the concentration of reactants at room temperature. The elementary analysis of the polymer was carried out andthe combined formaldehyde was estimated. As the results, it was found that these polymers have branching structure, and that the mole ratio of urea/formaldehde in polymers increases with decreasing the initial concentration of each reactant. These phenomena would beexplained by the reaction mechanism described in previous papers.
