Many people concerned with gluing wood and other cellulose materials and having at hand both urea glues and polyvinyl acetate glues have mixed them together and used them in this way. A large number of test with such mixtures have no doubt been made in laboratories throughout the world, but with the exception of the report of Raknes on work done in Norway, little has been published, Raknes investigation was extensive but brought to light no unexpected effect, the properties of the adhesives being governed largely by the ratio of the thermosetting to the thermoplastic component.
Fore more detail look on Addition Polyvinil Acetat to Urea Formaldehyde
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