| 发明名称 |
Process for forming an aramid copolymer |
| 摘要 |
The invention concerns processes for forming a polymer comprising residues of 2-(4-amino phenyl)-5(6) amino benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride, comprising the steps of: (a) forming a solution of oligomers having amine end groups from two moles of DAPBI and one mole of terephthaloyl dichloride in a solvent system comprising an organic solvent and an inorganic salt; (b) adding PPD to the solution of oligomers; and (c) adding additional terephthaloyl dichloride to form a polymer. |
| 申请公布号 |
US8907051(B2) |
申请公布日期 |
2014.12.09 |
| 申请号 |
US201213559691 |
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 |
C08G73/00;C08G73/18;C08G69/32;C08K5/20;C08K3/30;C08G69/48 |
主分类号 |
C08G73/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for forming a polymer comprising residues of 2-(4-amino phenyl)-5 (6) amino benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride, comprising the steps of:
a) forming a solution of oligomers having amine end groups from two moles of DAPBI and one mole of terephthaloyl dichloride in a solvent system comprising an organic solvent and an inorganic salt; b) adding PPD to the solution of oligomers; and c) adding additional terephthaloyl dichloride to form a polymer;wherein the amount of the solution that is DAPBI in step (a) is in the range of from 1 to 10 weight %. |
| 地址 |
Wilmington DE US |
