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:
Sep. 05, 2000
Filed:
Dec. 23, 1997
Applicant:
Inventors:
Gerald L Larson, Newtown, PA (US);
Ram R Chawla, Bensalem, PA (US);
Assignee:
Sivento Inc., Ridgefield Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556413 ;
Abstract
Alkyl(amino)dialkoxysilanes are prepared by anhydrously reacting stoichiometric amounts of an alkoxysilane and an alkylaminomagnesium chloride in a reverse addition process. The alkylamino magnesium chloride is preferably prepared in situ by the reaction of a Grignard reagent (RMX) and an alkylamine in a suitable aprotic solvent, such as tetrahydrofuran. The 'alkyl' substituent can be alkyl, arylalkyl or aryl. The reaction can be conducted in the temperature range of from 25.degree. C. to 75 .degree. C., without a catalyst, and the aprotic solvent is recovered for re-use in the process.