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. 06, 2012
Filed:
Apr. 03, 2009
Applicants:
Douglas C. Greminger, Midland, MI (US);
Ronald B. Leng, Midland, MI (US);
William G. Stobby, Midland, MI (US);
Shari I. Kram, Midland, MI (US);
Inventors:
Douglas C. Greminger, Midland, MI (US);
Ronald B. Leng, Midland, MI (US);
William G. Stobby, Midland, MI (US);
Shari I. Kram, Midland, MI (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08C 19/12 (2006.01); C08F 8/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A polybutadiene brominating method uses a quaternary ammonium tribromide as the brominating agent. The brominating is performed in solution, and dual extractions recover the spent brominating agent and recombine it with fresh bromine to regenerate an active tribromide. Solvent and aqueous extraction streams can be purified and recycled as needed.