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.
申请公布号
WO2004101470(A2)
申请公布日期
2004.11.25
申请号
WO2004US14042
申请日期
2004.05.05
申请人
E.I. DUPONT DE NEMOURS AND COMPANY;SUNKARA, HARI, BABU;DO, HIEP, QUANG
