| 发明名称 |
PREPARATION OF DIPHENYLMETHANE-BASE POLY(O- ALKYLURETHANE) |
| 摘要 |
The invention relates to an improved process for the preparation of monomeric and polymeric poly(O-alkylurethanes) of the diphenylmethane series by reacting the corresponding amines with dialkyl carbonates in the presence of a catalyst and isolating the products in high purity, as well as to the use of the products for preparing the corresponding isocyanates. |
| 申请公布号 |
JPH05148217(A) |
申请公布日期 |
1993.06.15 |
| 申请号 |
JP19920125461 |
申请日期 |
1992.04.20 |
| 申请人 |
BAYER AG |
发明人 |
GIYUNTERU HAMUMEN;TOMASU SHIEEBU;SUTEFUAN BUERUSHIYOOFUEN |
| 分类号 |
B01J31/12;C07B61/00;C07C263/04;C07C265/12;C07C269/04;C07C271/26;C08G18/72;C08G71/00;C08G71/04 |
主分类号 |
B01J31/12 |
| 代理机构 |
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代理人 |
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