C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 275/60 (2006.01) C07C 273/18 (2006.01) C07D 273/04 (2006.01) C08G 18/18 (2006.01) C08G 18/78 (2006.01)
Patent
CA 2213032
The present invention relates to a process for preparing an isocyanate group-containing allophanate corresponding to formula (I) (see formula I) wherein R represents the residue obtained by removing the isocyanate groups from a (cyclo)aliphatic or araliphatic diisocyanate, Y represents the represents an m-valent residue obtained by removing the hydroxyl groups from a (poly)hydroxyl compound having m OH groups and n and m are the same or different and have a value of 1 to 5, by reacting an isocyanate group-containing oxadiazinetrione with a primary alcohol in the presence of a basic catalyst having a pKa value of >6.
K"onig Klaus
Reiff Helmut
Traubel Harro
Wamprecht Christian
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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