PRODUCTION OF AROMATIC POLYETHER

PRODUCTION OF AROMATIC POLYETHER

PROBLEM TO BE SOLVED: To provide an arom. polyether which is highly transparent and lowly yellowed, i.e., lowly colored. SOLUTION: This polyether is produced by polymerizing a halophenol and/or a substantially equimolar mixture of a dihydric phenol and a dihalogenobenzenoid compd. (provided the halo...

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Hauptverfasser: SATO KUNIHISA, YANO YUMIKO
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Sprache:eng
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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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creator SATO KUNIHISA
YANO YUMIKO
description PROBLEM TO BE SOLVED: To provide an arom. polyether which is highly transparent and lowly yellowed, i.e., lowly colored. SOLUTION: This polyether is produced by polymerizing a halophenol and/or a substantially equimolar mixture of a dihydric phenol and a dihalogenobenzenoid compd. (provided the halogen atoms or atom of the dihalogenobenzenoid compd. or the halophenol have or has been activated by -SO2 - or -CO- bonded to the o- or p-position thereof) in a highly polar org. solvent in the presence of a carbonate and/or a bicarbonate of an alkali metal in an equivalent ratio of the alkali metal to the phenolic hydroxyl group present of 1 or higher. In the above process, also phosphinic acid is present in an amt. of 0.01-0.06% based on the polyether to be obtd. in the polymn. system, thus giving a lowly colored arom. polyether.
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SOLUTION: This polyether is produced by polymerizing a halophenol and/or a substantially equimolar mixture of a dihydric phenol and a dihalogenobenzenoid compd. (provided the halogen atoms or atom of the dihalogenobenzenoid compd. or the halophenol have or has been activated by -SO2 - or -CO- bonded to the o- or p-position thereof) in a highly polar org. solvent in the presence of a carbonate and/or a bicarbonate of an alkali metal in an equivalent ratio of the alkali metal to the phenolic hydroxyl group present of 1 or higher. 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subjects 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
title PRODUCTION OF AROMATIC POLYETHER
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