| 发明名称 |
METHOD FOR PRODUCING POLYISOCYANATES AND USE OF SAID POLYISOCYANATES |
| 摘要 |
The present invention relates to a method for producing polyisocyanates comprising iminooxadiazinedione groups, wherein at least one monomeric di- and/or tri-isocyanate is oligomerised in the presence of a) at least one catalyst, b) at least one additive (A) having a relative permittivity at 18° C. to 30° C. of at least 4.0, c) optionally further additives other than A. The invention relates further to a reaction system for producing polyisocyanates comprising iminooxadiazinedione groups, and to the use of an additive (A) having a relative permittivity at 18° C. to 30° C. of at least 4.0 for producing polyisocyanates comprising iminooxadiazinedione groups by catalysed modification of monomeric di- and/or tri-isocyanates. |
| 申请公布号 |
US2016168308(A1) |
申请公布日期 |
2016.06.16 |
| 申请号 |
US201414906058 |
申请日期 |
2014.07.21 |
| 申请人 |
COVESTRO DEUTSCHLAND AG |
发明人 |
RICHTER Frank;HALPAAP Reinhard |
| 分类号 |
C08G18/02 |
主分类号 |
C08G18/02 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A method for producing polyisocyanates containing iminooxadiazinedione groups, comprising oligomerizing at least one monomeric di- andlor tri-isocyanate in the presence of
a) at least one catalyst b) at least one additive (A) having a relative permittivity at 18° C. to 30° of at least 4.0, c) optionally further additives other than A. |
| 地址 |
Leverkusen DE |
