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 discolored polymer is contacted with adsorbent and separated therefrom, for instance, by filtration. The treated polytrimethylene, preferably, has an APHA color of less than about 50 and a molecular weight of about 250 to about 5000.
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申请公布号 |
US2004225162(A1) |
申请公布日期 |
2004.11.11 |
申请号 |
US20030634687 |
申请日期 |
2003.08.05 |
申请人 |
SUNKARA HARI BABU;DO HIEP QUANG |
发明人 |
SUNKARA HARI BABU;DO HIEP QUANG |
分类号 |
C08G65/46;(IPC1-7):C07C31/18 |
主分类号 |
C08G65/46 |
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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