| 发明名称 |
CRYSTALLIZATION-STABLE MDI ALLOPHANATES BY A TWO-STAGE PROCESS |
| 摘要 |
The present invention relates to new diphenylmethane diisocyanate (i.e. MDI) allophanates and to a process for their preparation. These new MDI allophanates are prepared by a two-stage process, which in spite of a relatively high degree of oligomerization are distinguished by crystallization stability.
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| 申请公布号 |
CA2523401(C) |
申请公布日期 |
2013.02.26 |
| 申请号 |
CA20052523401 |
申请日期 |
2005.10.14 |
| 申请人 |
BAYER MATERIALSCIENCE AG |
发明人 |
SIMON, JOACHIM;RUTTMANN, GERHARD;KOEHLER, BURKHARD |
| 分类号 |
C08G18/78;C07C273/18;C07C275/60;C08G18/80 |
主分类号 |
C08G18/78 |
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