Process for preparing polyisocyanates containing iminooxadiazinedione groups
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.
Synthetic utility of 3-(perfluoro-1,1-dimethylbutyl)-1-propene. Part III. Synthesis and properties of (perfluoro-1,1-dimethylbutyl) acetic and propionic acids and their salts
The new highly fluorinated acids, CF3CF2CF2C(CF3)2CH2COOH and CF3CF2CF2C(CF3)2CH2CH2COOH, were synthesised by oxidation of the title alkene, CF3CF2CF2C(CF3)2CH2CHCH2, and of its alcohol derivative, CF3CF2CF2C(CF3)2CH2CH2CH2OH, respectively. Sodium salts of the new fluorinated acids were prepared and some of their properties as surfactants have been determined and compared with those of totally fluorinated