| 发明名称 |
Urea derivatives, process for their manufacture and their use as light protecting agents for polymers |
| 摘要 |
The amide nitrogen of 9,9-dimethyl-2-oxa-4-oxo-3,8-diazaspiro-(4,5)-decane reacts with isocyanates or diisocyanates to give novel urea derivatives which can be used as light stabilizers for plastic materials.
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| 申请公布号 |
US4247449(A) |
申请公布日期 |
1981.01.27 |
| 申请号 |
US19790062468 |
申请日期 |
1979.07.31 |
| 申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
WIEZER, HARTMUT;MAYER, NORBERT;KNORR, HARALD |
| 分类号 |
C08L23/00;C07D498/10;C07D498/20;C07D519/00;C08K5/00;C08K5/34;C08K5/3412;C08K5/3435;C08K5/35;C08L1/00;C08L7/00;C08L21/00;C08L27/00;C08L33/00;C08L33/02;C08L67/00;C08L77/00;C08L101/00;(IPC1-7):C08K5/35;C07D491/10;C07D491/20 |
主分类号 |
C08L23/00 |
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