LIQUID CRYSTALLINE POLYESTER, METHOD FOR PRODUCING LIQUID CRYSTALLINE POLYESTER, LIQUID CRYSTALLINE POLYESTER COMPOSITION, FILM, METHOD FOR PRODUCING FILM AND CIRCUIT BOARD

To provide a liquid crystalline polyester having high heat resistance.SOLUTION: There is provided a liquid crystalline polyester having a repeating unit (A1) represented by general formula (A1) and a repeating unit (A2) represented by general formula (A2), wherein the repeating unit (A2)/the repeating unit (A1) is 1.2 or more and the molar ratio [phenolic hydroxyl group/phenolic hydroxyl group+the acyl group] of a phenolic hydroxyl group to the total amount of a phenolic hydroxyl group and an acyl group calculated by 1H-NMR is 0.3 or less. In the formulae, Ar11 represents a phenylene group and Ar12 represents a naphthylene group. (A1) -O-Ar11-CO-, (A2) -O-Ar12-CO-.SELECTED DRAWING: None 【課題】耐熱性の高い液晶ポリエステルの提供。【解決手段】一般式（Ａ１）で表される繰返し単位（Ａ１）、及び、一般式（Ａ２）で表される繰返し単位（Ａ２）を有し、繰返し単位（Ａ２）／繰返し単位（Ａ１）が、１．２以上であり、１Ｈ－ＮＭＲにより算出される、フェノール性水酸基と、アシル基との合計量に対するフェノール性水酸基のモル比［フェノール性水酸基／（フェノール性水酸基＋アシル基）］が、０．３以下である、液晶ポリエステル。式中、Ａｒ１１は、フェニレン基を表す。Ａｒ１２は、ナフチレン基を表す。（Ａ１）－Ｏ－Ａｒ１１－ＣＯ－（Ａ２）－Ｏ－Ａｒ１２－ＣＯ－【選択図】なし