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. 24, 2004
Filed:
Sep. 05, 2002
Applicant:
Inventor:
Peter Jenkner, Rheinfelden, DE;
Assignee:
Degussa AG, Dusseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07F 7/10 ; C07B 6/300 ;
U.S. Cl.
CPC ...
C07F 7/10 ; C07B 6/300 ;
Abstract
A discoloration of an aminosilane having a content of a free base is treated by adding an acid chloride to the aminosilane to obtain a mixture having a molar excess of acid chloride; neutralizing the molar excess of the acid chloride in one or more steps with a molar deficit of a base to obtain a mixture containing a salt; separating off the salt from; and irradiating the remaining aminosilane with UV-containing light.