申请人:——
公开号:US20040158029A1
公开(公告)日:2004-08-12
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:lkylene 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.
高分子量随机聚羟基聚酰胺(PHPAs)是通过创建预聚物进一步聚合而产生的。随机预聚物是由化学计量比为1:1的起始材料形成的。起始材料是1:1化学计量平衡的酯化醛酸:lkylene或alkylene衍生的二胺盐。或者,起始材料是酯化的化学计量平衡的二酸:二胺盐和N'-氨基烷基(或烷基衍生)-D-aldaramic酸末端羧酸盐混合物。起始材料在碱性醇中使用第二胺聚合。聚合材料或随机预聚物被分离,然后在溶剂中进一步聚合,通常是醇和非醇的混合溶剂,以获得高分子量的PHPAs。