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:
Apr. 11, 2006
Filed:
Feb. 27, 2004
Eric J. Beckman, Aspinwall, PA (US);
Toby M. Chapman, Pittsburgh, PA (US);
Cedrick Favero, Givors, FR;
Christopher C. Capelli, Kenosha, WI (US);
Harold E. Swift, Gibsonia, PA (US);
William Eamon Carroll, Orefield, PA (US);
Eric J. Beckman, Aspinwall, PA (US);
Toby M. Chapman, Pittsburgh, PA (US);
Cedrick Favero, Givors, FR;
Christopher C. Capelli, Kenosha, WI (US);
Harold E. Swift, Gibsonia, PA (US);
William Eamon Carroll, Orefield, PA (US);
University of Pittsburgh, Pittsburgh, PA (US);
SNF SA, , FR;
Abstract
A process to produce N-vinylformamide includes the steps of: reacting hydroxyethyl formamide with a reactant comprising at least one cyclic anhydride group to form an ester, and dissociating the ester via heat in a thin film evaporation to synthesize N-vinylformamide and a compound comprising at least one diacid group, the N-vinylformamide separating from the diacid during the thin film evaporation. The reactant including at least one cyclic anhydride group can, for example, be succinic anhydride, maleic anhydride, phthalic anhydride, (2-docecen-1-yl)succinic anhydride, exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride or a polymer including at least one cyclic anhydride group. A process to produce N-vinylformamide comprises the steps of: mixing acetaldehyde, formamide and a source of anhydride in a single reaction vessel, reacting the acetaldehyde, formamide and the source of anhydride in the reaction vessel under pressure, dissociating an ester formed by a reaction between the source of anhydride and hydroxyethyl formamide formed in the reaction vessel to synthesize N-vinylformamide and a compound comprising at least one diacid group.