C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
402/131, 400/741
C07D 319/08 (2006.01) C07D 319/06 (2006.01) C07D 405/00 (2006.01) C08G 18/08 (2006.01) C08G 18/77 (2006.01) C08G 18/80 (2006.01)
Patent
CA 1254202
A PROCESS FOR THE PRODUCTION OF ORGANIC POLYISOCYANATES CONTAINING AT LEAST PARTLY BLOCKED ISOCYANATE GROUPS, THE COMPOUNDS OBTAINABLE BY THIS PROCESS AND THEIR USE IN THE PRODUCTION OF POLYURETHANES, STOVING LACQUERS OR AQUEOUS POLYISOCYANATE SOLUTIONS OR DISPERSIONS ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the production of organic polyisocyanates containing at least partly blocked isocyanate groups characterized in that specific cyclic dicarbonyl compounds are used as the blocking agent. The present invention also relates to the polyisocyanates containing at least partly blocked isocyanate groups obtainable by this process and to the use of the polyisocyanates containing at least partly blocked isocyanate groups obtainable by this process as reactants for isocyanate-reactive compounds for the production of isocyanate polyaddition products. The present invention also relates to the use of polyisocyanates containing at least partly blocked isocyanate groups obtainable by the above process for the production of aqueous stoving lacquers and to the use of these polyisocyanates for the production of aqueous polyisocyanate solutions or dispersions. The aqueous stoving lacquers and aqueous polyisocyanate solutions or dispersions are mixed with water in the presence of a base used in a quantity which is sufficient to guarantee the solubility or dispersibility of the polyisocyanates.
458134
Nachtkamp Klaus
Potter Terry A.
Weider Franz
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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