Process for preparing epoxy resins from hydroxy benzoic acid and bisphenol
AssigneeKabushiki Kaisha Venoseiyaku oyo Kenkyuso
InventorsRyuzo Ueno, Hiroyasu Matsumoto
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Abstract
A process for preparing an epoxy resin, which comprises reacting p-hydroxybenzoic acid and bisphenol A with an epihalohydrin in the presence of a base using a quaternary ammonium salt as a catalyst, the amount of the p-hydroxybenzoic acid being 10 to 90 mole% and the amount of the bisphenol A being 90 to 10 mole%, both based on the total amount of the hydroxybenzoic acid and bisphenol A.
Claims5
A process for preparing an epoxy resin, which comprises reacting p-hydroxybenzoic acid and bisphenol A with an epihalohydrin in the presence of a base using a quaternary ammonium salt as a catalyst, the amount of the p-hydroxybenzoic acid being 10 to 90 mole% and the amount of the bisphenol A being 90 to 10 mole%, both based on the total amount of the hydroxybenzoic acid and bisphenol A.
Dependencies are inferred from the claim text.