| 摘要 |
PCT No. PCT/EP95/03956 Sec. 371 Date Mar. 27, 1997 Sec. 102(e) Date Mar. 27, 1997 PCT Filed Oct. 6, 1995 PCT Pub. No. WO96/11222 PCT Pub. Date Apr. 18, 1996A method of removing heteropoly compounds from polyethers, polyesters and/or polyether esters, which are contaminated with heteropoly compounds is described, which comprises adding, to the polymers or a solution thereof, an ether whose polarity is so low that its addition leads to the deposition of the heteropoly compound in a separate phase, and separating off the precipitated heteropoly compound phase. The polymer phase which remains is preferably purified further using a solid adsorbent.
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