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:
Feb. 18, 1986
Filed:
Sep. 10, 1984
Gerhard Kunstle, Burghausen, DE;
Herbert Jung, Burghausen, DE;
Wacker-Chemie GmbH, Munich, DE;
Abstract
A process for stabilizing aqueous solutions of acetoacetamides which simultaneously results in the reduction of .beta.-aminocrotonic acid amide content. According to the process, to aqueous acetoacetamide solutions which have been prepared in a known manner by the reaction of diketene with ammonia or water-soluble primary or secondary aliphatic amines under basic conditions, sufficient amounts of diketene are added immediately after their preparation thereto at room temperature with vigorous stirring, to maintain a pH value of 6-7. The so obtained aqueous solutions of the acetoacetamides are not only substantially stable, but also especially pure since these solutions are neither contaminated by salt-like by-products nor by derivatives of .beta.-aminocrotonic acid amides.