Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1985-10-03
1990-05-29
Shah, Mukund J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C07D22900
Patent
active
049297244
ABSTRACT:
The invention is directed to a process for the production of uretdione group-containing compounds by dimerizing at least a part of the isocyanate groups of organic isocyanates in the presence of compounds containing phosphorus-nitrogen bonds as dimerization catalysts, characterized in that the reaction is carried out in the presence, as co-catalysts, of H-active organic compounds having a pKa-value of at least 6, which have at least one hydrogen atom bound to oxygen, sulphur or nitrogen.
The invention also relates to the uretdione group-containing compounds obtained according to this process and to their use for the production of plastics materials according to the isocyanate-polyaddition process.
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Saunders and Frisch, "Polyurethanes--Chemistry and Technology", Part I, 1961, p. 61.
M. I. Bakhitov et al. (Vysokomol. Soedin) Series B 1981, 23 (9), pp. 680-682.
M. I. Bakhitov et al. (Vysokomol Soedin), Series B (1983) 25 (11), pp. 830-833.
Breidenbach Peter
Engbert Theodor
Frohlich Jurg
Kubitza Werner
Mennicken Gerhard
Bayer Aktiengesellschaft
Cseh Carol L.
Gil Joseph C.
Roy Thomas W.
Shah Mukund J.
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