| 发明名称 |
PROCESS FOR PREPARING ARAMID COPOLYMER YARN USING AN ACID WASH |
| 摘要 |
The present invention concerns methods for removing sulfur from yarn comprising the steps of: a) contacting never-dried polymeric yarn with an aqueous base, the polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid solution of pH 5 or lower; and c) rinsing the yarn. |
| 申请公布号 |
US2015007859(A1) |
申请公布日期 |
2015.01.08 |
| 申请号 |
US201214371782 |
申请日期 |
2012.01.11 |
| 申请人 |
Allen Steven R.;Gabara Vlodek;Lowery Joseph Lenning;Newton Christopher William;Rodini David J.;Sitter Andrew J. |
发明人 |
Allen Steven R.;Gabara Vlodek;Lowery Joseph Lenning;Newton Christopher William;Rodini David J.;Sitter Andrew J. |
| 分类号 |
D01D10/06 |
主分类号 |
D01D10/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for removing sulfur from yarn comprising the steps of:
a) contacting never-dried polymeric yarn with an aqueous base, said polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid solution of pH 5 or lower; and c) rinsing the yarn. |
| 地址 |
Midlothian VA US |
