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    • 2. 发明授权
    • Method for preparing 2,6-naphthalene dicarboxylic acid
    • 2,6-萘二甲酸的制备方法
    • US07355071B2
    • 2008-04-08
    • US11090054
    • 2005-03-28
    • Masaya KitayamaHiroyuki Wakamori
    • Masaya KitayamaHiroyuki Wakamori
    • C07C51/42
    • C07C51/09C07C63/38
    • Disclosed is an improved method for preparing 2,6-naphthalene dicarboxylic acid from di-lower alkyl 2,6-naphthalene dicarboxylate, which is characterized in that hydrolyzing di-lower alkyl 2,6-naphthalene dicarboxylate in a specified amount of water in the presence of specified amount of hydrophobic organic solvent and an additive; that hydrolyzing di-lower alkyl 2,6-naphthalene dicarboxylate in a specific amount of a mixed solvent of non-water miscible alcohol and water; or in that di-lower alkyl 2,6-naphthalene dicarboxylate is hydrolyzed in two steps wherein the 1st step comprises hydrolyzing said ester in a water miscible organic solvent in the presence of a small amount of water, and the 2nd step comprises further hydrolyzing the reaction.
    • 本发明公开了一种从2,6-二萘基二羧酸二低级烷基酯制备2,6-萘二羧酸的改进方法,其特征在于将2,6-萘二羧酸二低级烷基酯在规定量的水中 存在规定量的疏水性有机溶剂和添加剂; 在特定量的非水混溶性醇和水的混合溶剂中水解2,6-萘二甲酸二低级烷基酯; 或者在2,6-二羧酸二低级烷基酯中以两个步骤水解,其中第一步包括在少量水存在下在水混溶性有机溶剂中水解所述酯,第二步包括进一步水解 反应。
    • 3. 发明申请
    • Method for manufacturing wholly aromatic liquid-crystalline polyester resin
    • 全芳香族液晶聚酯树脂的制造方法
    • US20060084747A1
    • 2006-04-20
    • US11245200
    • 2005-10-07
    • Motoki AsaharaToshiki Nishino
    • Motoki AsaharaToshiki Nishino
    • C08K3/34C08K3/40
    • C08G63/78C08G63/065C08G63/19C08G63/605
    • The present invention provides a method for manufacturing a wholly aromatic liquid-crystalline polyester resin comprising the steps of: 1) acylating the hydroxy group of major monomer components selected from the group consisting of aromatic hydroxycarboxylic acid, aromatic diol and aromatic dicarboxylic acid, with an acylating agent, provided that said major monomer components comprise at least one of aromatic hydroxycarboxylic acid and aromatic diol; and 2) polycondensing said major monomer components of which hydroxy group is acylated, wherein, the polycondensation reaction is carried out in the presence of a metal dihydrogen phosphate in an amount of 1-5000 ppm based on the total monomer components, and a liquid-crystalline polyester resin manufactured by the method and a composition comprising said resin.
    • 本发明提供一种全芳香族液晶聚酯树脂的制造方法,包括以下步骤:1)将选自芳族羟基羧酸,芳族二醇和芳族二羧酸的主要单体成分的羟基与 所述主要单体组分包含芳族羟基羧酸和芳族二醇中的至少一种; 和2)缩聚其羟基被酰化的所述主要单体成分,其中缩聚反应在磷酸金属盐存在下以基于总单体组分的1-5000ppm的量存在下进行, 通过该方法制造的结晶性聚酯树脂和包含所述树脂的组合物。