| 发明名称 |
REMOVAL OF COLOR BODIES FROM POLYTRIMETHYLENE ETHER GLYCOL POLYMERS |
| 摘要 |
A process is described for reducing the discoloration of PO3G. The discolore d polymer is contacted with adsorbent and separated therefrom, for instance, b y filtration. The treated polytrimethylene, preferably, has an APHA color of less than about 50 and a molecular weight of about 250 to about 5000.</SDOAB >
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| 申请公布号 |
CA2522772(A1) |
申请公布日期 |
2004.11.25 |
| 申请号 |
CA20042522772 |
申请日期 |
2004.05.05 |
| 申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
SUNKARA, HARI BABU;DO, HIEP QUANG |
| 分类号 |
C08G65/46;(IPC1-7):C07C41/36 |
主分类号 |
C08G65/46 |
| 代理机构 |
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