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. 24, 2015
Filed:
Oct. 06, 2009
Michael Hill, Koeln, DE;
Mathias Dietz, Simmerath, DE;
Werner Krause, Huerth, DE;
Martin Sicken, Koeln, DE;
Michael Hill, Koeln, DE;
Mathias Dietz, Simmerath, DE;
Werner Krause, Huerth, DE;
Martin Sicken, Koeln, DE;
Clariant Finance (BVI) Limited, Tortola, VG;
Abstract
A method for producing mono-carboxy-functionalized dialkylphosphinic acids, esters and salts using a vinyl ether. The method is characterized by the following steps: a) reacting a phosphinic acid source (I) with olefins (IV) in the presence of a catalyst A to give an alkylphosphonous acid, the salt or the ester (II) thereof, b) reacting the alkylphosphonous acid so obtained, the salt or the ester (II) thereof with a vinyl ether of formula (V) in the presence of a catalyst B to give a mono-functionalized dialkylphosphinic acid derivative (VI) and c) reacting this derivative (VI) with an oxidant or in the presence of a catalyst C to give a mono-carboxy-functionalized dialkylphosphinic acid derivative (III), wherein the catalysts A and C are transition metals and/or transition metal compounds, and the catalyst B is a peroxide-forming compound and/or a peroxo compound and/or an azo compound.