- Phenol formaldehyde resin has a low content of free phenol, and method of production of such a resin

摘要

The invention relates to an aqueous solution may be diluted with a thermosetting resin phenol formaldehyde -. The resin is characterized in that it is the product using hydrofluoric acid, or ammonium salt, as an agent for ph adjustment. The resin is free of precipitates of salts, and present in the same time a very low content of free phenol, not having reacted.