C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
402/139, 260/315
C07D 233/88 (2006.01) C07D 233/72 (2006.01) C08G 18/38 (2006.01) C08G 18/40 (2006.01)
Patent
CA 1204762
A PROCESS FOR THE PRODUCTION OF BLOCKED COMPOUNDS OPTIONALLY CONTAINING FREE HYDROXYL GROUPS AND THEIR USE FOR THE PRODUCTION OF POLYURETHANES ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the production of compounds containing reversibly blocked and, optionally, free alcoholic hydroxyl groups, characterized in that organic compounds con- taining at least one alcoholic hydroxyl group, but otherwise being inert under the reaction conditions are reacted at 0 to 140°C with N,N'-disubstituted 5-acyl- imino-imidazolidine diones corresponding to the fol- lowing general formula Image The present invention also relates to the use of these compounds for the production of polyurethanes. This is accomplished by mixing the compounds prepared in acc- ordance with the present invention with polyisocyanates and heating the mixture to an elevated temperature whereby the blocking agent is released and the free hydroxyl groups are reformed and subsequently react with the isocyanate groups to form polyurethanes.
427192
Beer Wolfgang
Buschhaus Hans-Ulrich
Findeisen Kurt
Traenckner Hans-Joachim
Aktiengesellschaft Bayer
Marcoux & Sher Swabey Mitchell Houle
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