The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 1985
Filed:
Jul. 05, 1984
Terry A Potter, New Martinsville, WV (US);
Klaus Nachtkamp, Cologne, DE;
Franz Weider, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
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.