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:
Nov. 07, 2006
Filed:
Sep. 27, 2004
Mikolaj Jawdosiuk, Franklin, WI (US);
George Sosnovsky, Milwaukee, WI (US);
Jon Michael Clumpner, Sturgeon Bay, WI (US);
Anthony J. O'lenick, Jr., Dacula, GA (US);
Mikolaj Jawdosiuk, Franklin, WI (US);
George Sosnovsky, Milwaukee, WI (US);
Jon Michael Clumpner, Sturgeon Bay, WI (US);
Anthony J. O'Lenick, Jr., Dacula, GA (US);
Nova Molecular Technologies Inc., Janesville, WI (US);
Abstract
The present invention discloses a series of novel hindered spiro-ketal nitroxides prepared by the ketalization reaction of 1,3-propanediols with triacetoneamine followed by oxidation. These novel spiro-ketals have unexpected advantages in hydrocarbon and monomer solubility which is important in styrene processing and refinery stream inhibition. Further, the invention shows an unexpected advantage over commercially available nitroxides in hydrocarbon solubility, especially in styrene and hydrocarbons. This invention also shows that these novel spiro-nitroxides are capable of inhibiting vinyl and acrylate polymerizations using an effective inhibition concentration of the nitroxide of the present invention.