PHENOLIC RESIN EMULSIONS COMPRISING A RESOLE RESIN AND A SOLUBLE PROTEIN

摘要

Stable emulsions containing high concentrations of thermosettable phenol-formaldehyde resole resins as the dispersed phase. The emulsions comprise a resole with a formaldehyde-phenol ratio in the range of 0.85:1 to 3:1 and a water tolerance of less than 40 percent, in aqueous emulsion stabilized with a proteinaceous compound soluble in aqueous media at a pH of 7-10. The resole resins are prepared with amine catalysts and preferably are modified with melamine. The emulsions contain a small amount of alkali hydroxide and optionally urea or dicyandiamide. They are useful in the preparation of surface coatings and in the impregnation of cellulosic substrates.