| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the use of heterocycles containing trivalent phosphorus as a ring member as catalysts for isocyanate modification and to provide a method for producing trimer type polyisocyanates. <P>SOLUTION: The production method comprises reacting at least one aliphatic and/or alicyclic isocyanate in the presence of a heterocyclic catalyst. <P>COPYRIGHT: (C)2010,JPO&INPIT |
