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. 02, 2009
Filed:
Aug. 29, 2005
Andrew M. Piotrowski, Yorktown Heights, NY (US);
Edward D. Weil, Copley, OH (US);
Qiang Yao, Yorktown Heights, NY (US);
Sergei V. Levchik, Croton-on-Hudson, NY (US);
Andrew M. Piotrowski, Yorktown Heights, NY (US);
Edward D. Weil, Copley, OH (US);
Qiang Yao, Yorktown Heights, NY (US);
Sergei V. Levchik, Croton-on-Hudson, NY (US);
Supresta LLC, Ardsley, NY (US);
Abstract
A process is provided for the production of diaryl alkyl phosphonate by the reaction of triaryl phosphate with dialkyl alkyl phosphonate in the presence of alkali metal iodide catalyst; and, optionally, the diaryl alkyl phosphonate is reacted in situ with aromatic diol and, optionally, with at least one branching monomer, in the absence of other or further added catalyst to provide oligomeric and/or polymeric phosphonate products.