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    • 5. 发明授权
    • Method for preparing high molecular weight random polyhydroxypolyamides
    • 制备高分子量无规多羟基聚酰胺的方法
    • US06894135B2
    • 2005-05-17
    • US10734418
    • 2003-12-10
    • Donald E. KielyKylie KramerJinsong Zhang
    • Donald E. KielyKylie KramerJinsong Zhang
    • C08G63/685C08G69/26C08G69/28C08G283/04
    • C08G69/28C08G69/26Y10S525/926
    • High molecular weight random polyhydroxypolyamides (PHPAs) are produced by creating prepolymers which are further polymerized. Random prepolymers are formed from a stoichiometrically molar balance (1:1) starting material. The starting material is a 1:1 stoichiometrically balanced esterified aldaric acid:alkylene or alkylene derived diammonium salt. Alternatively, the starting material is an esterified stoichiometrically balanced diacid:diamine salt and a N′-ammoniumalkyl (or alkyl derived)-D-aldaramic acid terminal carboxylate zwitterionic salt mixture. The starting materials are polymerized in a basic alcohol using a second amine. The polymerized material, or the random prepolymers, are isolated and then further polymerized in a solvent, typically a mixed solvent of an alcohol and non-alcohol, to obtain the high molecular weight PHPAs.
    • 通过产生进一步聚合的预聚物制备高分子量无规多羟基聚酰胺(PHPAs)。 随机预聚物由化学计量摩尔平衡(1:1)原料形成。 原料是1:1化学计量平衡的酯化醛酸:亚烷基或亚烷基衍生的二铵盐。 或者,原料是酯化的化学计量平衡的二酸:二胺盐和N'-烷基(或烷基衍生的)-D-阿拉斯加酸末端羧酸酯两性离子盐混合物。 使用第二种胺将原料在碱性醇中聚合。 分离聚合的材料或无规预聚物,然后在溶剂(通常为醇和非醇的混合溶剂)中进一步聚合,得到高分子量的PTA。