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:
Jun. 30, 2015
Filed:
Oct. 06, 2009
Michael Hill, Cologne, DE;
Werner Krause, Huerth, DE;
Martin Sicken, Cologne, DE;
Clariant Finance (BVI) Limited, Tortola, VG;
Abstract
A method for producing mono-hydroxy-functionalized dialkylphosphinic acids, esters and salts. The method is includes: 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 ester of a carboxylic acid of formula (V) in the presence of a catalyst B to give a mono-functionalized dialkylphosphinic acid derivative (VI) and c) reacting the mono-functionalized dialkylphosphinic acid derivative (VI) so obtained in the presence of a catalyst C to give a mono-hydroxy-functionalized dialkylphosphinic acid derivative (III), the catalyst A is a transition metal, a transition metal compound or a catalyst system including a transition metal, or a transition metal compound and at least one ligand, and the catalyst B is a peroxide-forming compound and/or a peroxo compound or an azo compound, and the catalyst C is an acid or a base.