| 摘要 |
A polymer support is provided which comprises hydroxypolyC2-4 alkyleneoxy chains attached to a cross-linked polymer. The hydroxypolyC2-4 alkyleneoxy chain contains from 2 to 8 C2-4 alkyleneoxy groups and the polymer support h as from about 0.1 to about 5 meq free hydroxy groups per gram of polymer. Preferably, the cross-linked polymer is a copolymer comprising phenylethylen e and 4-hydroxyphenylethylene units or phenylethylene and 4- chloromethylphenylethylene units.
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