Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1984-07-05
1985-03-26
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
528 45, 528 73, 549265, 549274, C08G 1880
Patent
active
045074275
ABSTRACT:
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.
REFERENCES:
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Houben-Weyl, Methoden der Organischen Chemie, vol. XIV-2, pp. 61-70.
Z. Wicks, Jr. Prog. in Org. Coatings, 9, 3-28, (1981).
U. Herzog, H. Reinshagen, Eur. J. Med. Chem. 10, 323, (1975).
Nachtkamp Klaus
Potter Terry A.
Weider Franz
Bayer Aktiengesellschaft
Gil Joseph C.
Harsh Gene
Roy Thomas W.
Welsh Maurice J.
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