申请人:Richter Frank
公开号:US20060079694A1
公开(公告)日:2006-04-13
The present invention relates to process for preparing a polyisocyanate containing an iminooxadiazinedione group by trimerizing a portion of the isocyanate groups of a polyisocyanate, which does not contain iminooxadiazinedione groups, in the presence of a catalyst containing an anion corresponding to formula I)
(R
f
)
n
—CR′
(3-n)
—C(O)O
−
(I)
wherein
R
f
is a perfluorinated C
1
-C
30
radical which is optionally branched, cyclic and/or unsaturated,
R′ are identical or different, optionally heteroatom-containing substituents selected from H, C
1
-C
20
alkyl and/or aryl and n is 1 or 2.
本发明涉及一种通过三聚部分异氰酸酯基团制备含有亚胺氧二氮杂环二酮基团的聚异氰酸酯的方法,其中所述聚异氰酸酯不含有亚胺氧二氮杂环二酮基团,并在含有催化剂的情况下进行,所述催化剂包含与式I)对应的阴离子:(Rf)n—CR′(3-n)—C(O)O−(I)其中,Rf是一种全氟的C1-C30基团,可以是支链、环状和/或不饱和的;R′是相同或不同的、可选的含杂原子的取代基,选自H、C1-C20烷基和/或芳基;n为1或2。