| 发明名称 |
Ytterbium(III)acetylacetonate as catalyst for the preparation of aliphatic oligocarbonate-polyols |
| 摘要 |
<p>Oligocarbonate diols (I) having a number average mol. wt. of 500-5000 g/mol are prepared by transesterification of organic carbonates with aliphatic polyols in the presence of ytterbium (III) acetylacetonate. An independent claim is included for an NCO-terminated polymer prepared by reaction of a stoichiometric excess of organic (poly)isocyanates with oligocarbonate diols (I).</p> |
| 申请公布号 |
EP1477508(A1) |
申请公布日期 |
2004.11.17 |
| 申请号 |
EP20040010355 |
申请日期 |
2004.04.30 |
| 申请人 |
BAYER MATERIALSCIENCE AG |
发明人 |
HOFACKER, STEFFEN DR. |
| 分类号 |
B01J31/26;C07F5/00;C08G18/10;C08G18/44;C08G63/64;C08G64/30;(IPC1-7):C08G64/30 |
主分类号 |
B01J31/26 |
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