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The thermoplastic polyhydroxyethers can be prepared by admixing from about 0.975 to about 1.020 moles of an epihalohydrin with one mole of a dihydric phenol together with from about 1.030 to 1.125 moles of an alkali metal hydroxide, such as sodium hydroxide or potassium hydroxide in an aqueous medium at about 60 to about 70 C. The exothermic reaction which ensues is allowed to wherein n is an inte
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