| 发明名称 |
Tetraazaporphyrins and optical recording medium |
| 摘要 |
An optical recording medium contains tetraazaporphyrins of the formula <IMAGE> where L1, L2, L3 and L4 are each independently of the others the radical of a bicyclic aromatic heterocycle containing 1 to 3 identical or different heteroatoms selected from the group consisting of N, O and S, which may be substituted, and R1 and R2 have defined meanings.
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| 申请公布号 |
US5032495(A) |
申请公布日期 |
1991.07.16 |
| 申请号 |
US19890395576 |
申请日期 |
1989.08.18 |
| 申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
ALBERT, BERNHARD;NEUMANN, PETER;KOHLER, ROLF-DIETER |
| 分类号 |
G03G5/06;B41M5/26;C07D487/22;C07D495/22;C07D498/22;C07D513/22;C07F7/02;C07F7/08;C07F7/10;C09B47/00;G11B7/244;G11B7/248 |
主分类号 |
G03G5/06 |
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