METHOD FOR PRODUCING POLYETHER AND POLYETHER

• Main Authors: NAGAOKA YU, KAMIYA SHOTA
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2019
• 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

To provide a production method that can obtain a polyether having low turbidity without decreased productivity, in an unsaturated group-containing polyether or a reactive silicon group-containing polyether that has become turbid with generation of ascorbic acid metal salt.SOLUTION: A method for producing a polyether includes adding at least one selected from polar solvents to an unsaturated group-containing polyether or reactive silicon group-containing polyether with a content of ascorbic acid metal salt of 5 ppm or more, mixing them, and then devolatilizing the polar solvent, so that a turbidity index A660 becomes 0.006 or less.SELECTED DRAWING: None 【課題】アスコルビン酸金属塩の生成により濁った不飽和基含有ポリエーテル又は反応性ケイ素基含有ポリエーテルにおいて、生産性を落とすことなく低濁度なポリエーテルを取得することができる製造方法を提供する。【解決手段】アスコルビン酸金属塩量が５ｐｐｍ以上である不飽和基含有ポリエーテル又は反応性ケイ素基含有ポリエーテルに極性溶媒から選ばれる少なくとも一種を添加し、混合したのち極性溶媒を脱揮して、濁度指標Ａ６６０が０．００６以下となることを特徴とする、ポリエーテルの製造方法。【選択図】なし