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:
Oct. 14, 2008
Filed:
Feb. 20, 2004
Applicants:
Reinhard Linemann, Nassandres, FR;
Serge Hub, Villeurbanne, FR;
Guillaume Le, Colombelles, FR;
Georges Martino-gauchi, Lyons, FR;
Inventors:
Reinhard Linemann, Nassandres, FR;
Serge Hub, Villeurbanne, FR;
Guillaume Le, Colombelles, FR;
Georges Martino-Gauchi, Lyons, FR;
Assignee:
Arkema France, Colombes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 45/87 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a process for the preparation of dimethylketene (DMK) and then of polydimethylketene (PDMK) by polymerization of DMK. More specifically, the DMK is obtained by pyrolysis by isobutyric anhydride (IBAN), the latter decomposing under the effect of heat (pyrolysis) to give isobutyric acid (IBA) and DMK. One mole of pyrolyzed IBAN gives one mole of IBA and one mole of DMK.