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. 02, 2013
Filed:
Apr. 17, 2009
Applicants:
John W. Hull, Jr., Midland, MI (US);
Douglas C. Greminger, Midland, MI (US);
Timothy J. Adaway, Midland, MI (US);
Inventors:
John W. Hull, Jr., Midland, MI (US);
Douglas C. Greminger, Midland, MI (US);
Timothy J. Adaway, Midland, MI (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 8/20 (2006.01); C08F 36/16 (2006.01); C08F 236/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
Butadiene copolymers are brominated using certain quaternary ammonium tribromides as the brominating agent in a first step, and then with elemental bromine in a second bromination step. The bromination process proceeds easily under mild conditions, and produces a brominated product that has excellent thermal stability. The bromination proceeds to high conversions in shorter reaction times, when the bromination is performed using only the first bromination step.