Prodn of glycidyl exhers of mono-or polyhydrie phenols - hydrie phenols

Production of glycidyl ethers of mono- or polyhydric phenols Comprises reacting a mono- or polyhydric phenol with excess epichlorohydrin in an aqueous alkaline medium containing 0.95-1.15 equivalent of an alkali(ne earth) hydroxide per equivalent of phenolic OH groups. The alkali(ne earth) hydroxide...

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Bibliographische Detailangaben
1. Verfasser:	BECKER,WILHELM,DR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	Production of glycidyl ethers of mono- or polyhydric phenols Comprises reacting a mono- or polyhydric phenol with excess epichlorohydrin in an aqueous alkaline medium containing 0.95-1.15 equivalent of an alkali(ne earth) hydroxide per equivalent of phenolic OH groups. The alkali(ne earth) hydroxide is added gradually (over 30-300 mins) with cooling. The water is distilled off, followed by excess epichlorohydrin. The glycidyl ether is separated from the alkali(ne earth) chloride precipitated during the reaction by filtration or extraction with an organic solvent. This process gives filtration on extraction with an organic solvent. This process gives nearly theoretical yields. Other advantages include the relatively low reaction temperature (50-100 degrees C, pref. 75-95 degrees C), and good viscosity stability of the products.