METHOD FOR PRODUCING LIQUID CRYSTALLINE RESIN

• Main Authors: KAWAHARA TOSHINORI, SUZUKI KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 06.12.2023
• 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 method for producing a liquid crystalline resin which can produce a liquid crystalline resin by suppressing foreign matter contamination with high yields.SOLUTION: There is provided a method for producing a liquid crystalline resin, which comprises subjecting a raw material monomer containing one or more selected from the group consisting of an aromatic hydroxycarboxylic acid and a polymerizable derivative thereof to melt polycondensation reaction in a reaction vessel, wherein in performing the melt polycondensation reaction, the melting point of the liquid crystalline resin is defined as Tm2, the raw material monomer is subjected to a melt polycondensation reaction at a polymerization temperature within the range of Tm2 to (Tm2+30)°C and the temperature of an area of the reaction vessel in contact with a space above the reaction liquid surface during the melt polycondensation reaction is adjusted within the range of (Tm2-100) to (Tm2-5)°C.SELECTED DRAWING: None 【課題】異物混入を抑制しかつ収率良く液晶性樹脂を製造することができる液晶性樹脂の製造方法を提供する。【解決手段】液晶性樹脂の製造方法であり、芳香族ヒドロキシカルボン酸及びその重合可能な誘導体からなる群より選択される１以上を含む原料モノマーを、反応容器内で溶融重縮合反応させることを含み、溶融重縮合反応させることが、液晶性樹脂の融点をＴｍ２としたとき、原料モノマーを、最終重合温度がＴｍ２～（Ｔｍ２＋３０）℃の範囲内で溶融重縮合反応させ、かつ溶融重縮合反応中の反応容器の、溶融重縮合反応時に反応液面よりも上の空間に接する領域の温度を、（Ｔｍ２－１００）～（Ｔｍ２－５）℃の範囲内にすること、を含む、液晶性樹脂の製造方法とする。【選択図】なし