| 发明名称 |
Urea derivatives, their preparation, and their use as light stabilizers |
| 摘要 |
The invention provides novel 4-carbamoyl derivatives of 1-oxa-3-oxo-4,8-diaza-spiro-[4,5]-decanes and their preparation from 1 oxa-3-oxo-4,8-diaza-spiro-[4,5]-decanes and isocyanates. The products are suitable light stabilizers for thermoplastics.
|
| 申请公布号 |
US4191684(A) |
申请公布日期 |
1980.03.04 |
| 申请号 |
US19780935470 |
申请日期 |
1978.08.21 |
| 申请人 |
HOECHST AG |
发明人 |
KNORR, HARALD;MAYER, NORBERT;PFAHLER, GERHARD;WIEZER, HARTMUT |
| 分类号 |
C07D498/10;C07D498/20;C08K5/35;(IPC1-7):C07D491/10;C07D491/20 |
主分类号 |
C07D498/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
