| abstract |
PURPOSE: To obtain the titled novel resin having improved heat resistance, and easily purified, by reacting an alkali metal salt of a bifunctional phenol with a xylylene dihalide, using an inexpensive low-boiling solvent. n CONSTITUTION: An aqueous solution of an alkali metal salt of a bifunctional phenol expressed by the formula MO-Ar-OM' (M and M' are alkali metal; Ar is bifunctional aromatic group) is reacted with (B) a solution of a xylylenediamine containing preferably 60mol% or more p-xylylenediamine in an organic solvent, e.g. methylene chloride or chlorobenzene, in the presence of a phase transfer catalyst, e.g. a quaternary ammonium salt or quaternary phosphonium salt, to give the aimed resin expressed by the formula. n COPYRIGHT: (C)1981,JPO&Japio |