发明名称 |
Aramid copolymer |
摘要 |
The invention concerns polymer powder comprising 2-(4-amino phenyl)-5 (6) amino benzimidazole (DAPBI), paraphenylene diamine, and terephthaloyl dichloride, capable of being dissolved in a solvent system comprising (i) N-methyl-2-pyrrolidone (NMP) or dimethylacetamide (DMAC) and (ii) an inorganic salt; wherein said polymer is capable of being redissolved in said solvent system after said polymer has been removed from said solvent system. |
申请公布号 |
US9127143(B2) |
申请公布日期 |
2015.09.08 |
申请号 |
US201213559696 |
申请日期 |
2012.07.27 |
申请人 |
E I DU PONT DE NEMOURS AND COMPANY |
发明人 |
Lee Kiu-Seung |
分类号 |
C08K5/34;C08K5/20;C08K3/16;C08G64/00;C08G73/18;C08G75/00;C08K5/3415;C08G69/32;C08G69/26 |
主分类号 |
C08K5/34 |
代理机构 |
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代理人 |
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主权项 |
1. A neutralized polymer powder comprising residues of 2-(4-amino phenyl)-5 (6) amino benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride (TCl),
wherein the neutralized polymer powder is soluble in and forms a clear solution in a solvent system comprising (i) N-methyl-2-pyrrolidone (NMP) or dimethylacetamide (DMAC) and (ii) an inorganic salt; the neutralized polymer powder being obtainable by a process including the steps of: a) forming a polymer in an organic solvent by reacting DAPBI with TCl to form oligomers, followed by the addition of PPD and more TCl; b) isolating the polymer from the solvent; c) comminuting the polymer to a desired particle size; d) treating the polymer with one or more neutralizing steps, the polymer being optionally washed with water prior to and/or after the neutralizing step(s). |
地址 |
Wilmington DE US |