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. 03, 1987
Filed:
Nov. 22, 1985
Applicant:
Inventors:
Hans-Joachim Kotzsch, Rheinfelden, DE;
Hans-Joachim Vahlensieck, Wehr, DE;
Assignee:
Dynamit Nobel AG, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556411 ;
Abstract
Disclosed is a method of preparing bis-trimethylsilylamides of carboxylic acids from the carboxylic acid amide by mixing two equivalents of trimethylchlorosilane and an excess of hexamethyldisilazane, heating the mixture to 40.degree. to 80.degree. C. and adding two equivalents of a tertiary amine as acid acceptor. The method results in substantially improved purity and yield of end product.