发明授权
US4191684A Urea derivatives, their preparation, and their use as light stabilizers
失效
尿素衍生物,它们的制备及其作为光稳定剂的用途
- 专利标题: Urea derivatives, their preparation, and their use as light stabilizers
- 专利标题(中): 尿素衍生物,它们的制备及其作为光稳定剂的用途
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申请号: US935470申请日: 1978-08-21
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公开(公告)号: US4191684A公开(公告)日: 1980-03-04
- 发明人: Hartmut Wiezer , Gerhard Pfahler , Norbert Mayer , Harald Knorr
- 申请人: Hartmut Wiezer , Gerhard Pfahler , Norbert Mayer , Harald Knorr
- 申请人地址: DEX Frankfurt am Main
- 专利权人: Hoechst Aktiengesellschaft
- 当前专利权人: Hoechst Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt am Main
- 优先权: DEX2738340 19770825
- 主分类号: C07D498/10
- IPC分类号: C07D498/10 ; C07D498/20 ; C08K5/35 ; C07D491/10 ; C07D491/20
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.
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