| 摘要 |
The present invention relates to a process for the production of uretdione group-containing polyisocyanates having aliphatically- and/or cycloaliphatically-bound isocyanate groups by dimerizing a portion of the isocyanate groups of organic diisocyanates having aliphatically- and/or cycloaliphatically-bound isocyanate groups in the presence of a dimerization-accelerating catalyst and terminating the dimerization reaction when the desired degree of dimerization in each case has been reached by addition of a catalyst poison or by the removal of the catalyst by distillation, characterized in that antimony(V)fluoride is used as the catalyst.
|
