发明名称 |
POLYSULFON-MEMBRAN ZUR REINIGUNG VON BLUT |
摘要 |
A polysulfone membrane for purifying blood having excellent compatibility with blood and the process producing the membrane are disclosed. The membrane comprises a mixed polymer phase of a graft copolymer and/or block copolymer having a molecular weight of 3 x 10<5> daltons or more and comprising (A) a hydrophilic segment and (B) a hydrophobic segment (exclusive of polysulfone) in a total amount of from 0.5 to 30 parts by weight per 100 parts by weight of polysulfone, with the monomer unit ratio (A/B) between the segments A and B being from 0.5 to 5. The copolymer is preferably a graft copolymer where the hydrophilic segment is a polyvinylpyrrolidone segment and the hydrophobic segment is a polystyrene segment. The membrane can be prepared by applying a wet film formation process to a dope containing an appropriate solvent of the mixed polymer, such as N,N-dimethylacetamide. The membrane for purifying blood reduces cumbersomeness in the washing of the coagulated membrane during the film formation process and allows recovery of the solvent from the coagulating solution at a high recovery rate because the copolymer contained in the structure of the membrane is substantially not eluted into water contacted during the film formation process and the washing step. |
申请公布号 |
DE69629042(D1) |
申请公布日期 |
2003.08.14 |
申请号 |
DE1996629042 |
申请日期 |
1996.10.09 |
申请人 |
ASAHI KASEI KOGYO K.K., OSAKA |
发明人 |
MIURA, MORIKAZU;NITADORI, YOSHIAKI;KIGUCHI, AKIRA;MUKAIYAMA, SHIGEMI |
分类号 |
B01D67/00;B01D71/68;B01D71/78;B01D71/80;(IPC1-7):B01D71/68;B01D71/28;B01D71/38 |
主分类号 |
B01D67/00 |
代理机构 |
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代理人 |
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主权项 |
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