发明名称 |
PROCESS FOR FORMING AN ARAMID COPOLYMER |
摘要 |
The invention concerns processes for forming polymer crumb comprising residues of 2-(4-amino phenyl)-5 (6) amino phenyl benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride (TCl), comprising the steps of: i) forming a slurry of b mole percent DAPBI in a solvent system comprising organic solvent and c weight percent of an inorganic salt, wherein the inorganic salt is present in an amount of at least 5 weight present of the organic solvent; ii) contacting the slurry with a less than stoichiometric amount of terephthaloyl chloride to form an prepolymer solution; and iii) contacting the prepolymer solution with y mole percent of PPD and additional TCL to form a polymer solution; wherein the total amount of TCL added in steps ii) and iii) is a stoichiometric amount based on the total amount of DAPBI and PPD added in steps i) and iii); the DAPBI and PPD are added in an amount sufficient for providing a polymer solution having a weight percent solids of 12 percent or greater on a polymer basis; and wherein the sum of y+b is 100 and the product of b x c is 225 or greater. |
申请公布号 |
WO2014018058(A1) |
申请公布日期 |
2014.01.30 |
申请号 |
WO2012US48614 |
申请日期 |
2012.07.27 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY;MALLON, FREDERICK, K. |
发明人 |
MALLON, FREDERICK, K. |
分类号 |
C08G69/32;C08G69/04;C08G73/18 |
主分类号 |
C08G69/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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