会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明授权
    • Method for preparing a high molecular weight polyethermide polymer in a
dual solvent system
    • 在双溶剂体系中制备高分子量聚醚酰亚胺聚合物的方法
    • US5189137A
    • 1993-02-23
    • US772175
    • 1991-10-07
    • Paul E. HowsonPatricia D. Mackenzie
    • Paul E. HowsonPatricia D. Mackenzie
    • C08G73/10
    • C08G73/1032C08G73/1053
    • A method for preparing high molecular weight polyethermide polymers in a dual solvent system is disclosed. The inventive method provides for polymerizing a diamine monomer and a dianhydride monomer in a solvent system comprised of at least two solvents, a first solvent is selected for its solubility characteristics such that the polyethermide polymer is highly soluble therein and a second solvent is selected for its relatively high boiling point characteristics such that when the second solvent and first solvent are mixed together, the boiling point of the dual solvent system is at least as high as the temperature at which polymerization of said monomers occurs. In one embodiment, a diamine monomer of 4,4'-sulfonyl dianiline (SDAN) is reacted with a dianhydride monomer of bisphenol A dianhydride (BPADA) in the presence of a catalyst and a chain stopper in a dual solvent system comprised of chloroform and ortho-dichlorobenzene. The resulting polyethermide has an intrinsic viscosity exceeding 0.76 dl/g in chloroform at 25.degree. C.
    • 公开了一种在双溶剂体系中制备高分子量聚醚酰亚胺聚合物的方法。 本发明的方法提供了在由至少两种溶剂组成的溶剂体系中使二胺单体和二酐单体聚合,选择第一溶剂的溶解度特征,使得聚醚酰亚胺聚合物在其中高度溶解,并且为其选择第二溶剂 相对高的沸点特性使得当第二溶剂和第一溶剂混合在一起时,双溶剂体系的沸点至少与所述单体聚合反应的温度一样高。 在一个实施方案中,4,4'-磺酰基二苯胺(SDAN)的二胺单体与双酚A二酐(BPADA)的二酐单体在催化剂和链终止剂的存在下在由氯仿和 邻二氯苯。 得到的聚醚酰西胺在25℃在氯仿中的特性粘度超过0.76dl / g