(12) United States Patent (10) Patent No.: US 8,349,977 B2 Koenig Et Al
US008349977B2 (12) United States Patent (10) Patent No.: US 8,349,977 B2 Koenig et al. (45) Date of Patent: Jan. 8, 2013 (54) PROCESS FOR PREPARING W. W338 A .289 SETITY ISOBUTENE HOMO- OR WO WO 2010, 139684 A1 12/2010 OTHER PUBLICATIONS (75) Inventors: Hannah Maria Koenig, Mannheim (DE); Klaus Muellbach, Gruenstadt Edward C. Leonard. “High Polymers'. Wiley-Interscience, A Divi (DE); Matthias Kiefer, Ludwigshafen sion of John Wiley & Sons, Inc., vol. XXIV. (part 2), 1971, 1 front (DE); Sergei V. Kostjuk, Minsk (BY); page, pp. 713-733. 66/ - - - - - Irina Vasilenko, Minsk (BY): James D. Burrington, et al., Cationic polymerization using s s heteropolyacid salt catalysts'. Topics in Catalysis, vol. 23, Nos. 1-4. Alexander Frolov, Svisloch (BY) Aug. 2003, pp. 175-181. Sergei V. Kostjuk, et al., “Novel Initiating system based on AlCl (73) Assignee: BASFSE, Ludwigshafen (DE) etherate for quasiliving cationic polymerization of styrene'. Polymer Bulletin, vol. 52, 2004, pp. 227-234. (*) Notice: Subject to any disclaimer, the term of this Sergei V. Kostjuk, et al., “Cationic Polymerization of Styrene in patent is extended or adjusted under 35 Solution and Aqueous Suspension Using B(C6F5) as a Water-Toler U.S.C. 154(b) by 0 days. ant Lewis Acid', Macromolecules, vol.39, No. 9, Apr. 8, 2006, pp. 3110-3113. (21) Appl. No.: 13/029,413 U.S. Appl. No. 13/126,857, filed Apr. 29, 2011, Hildebrandt, et al. U.S. Appl. No. 13/305,132, filed Nov. 28, 2011, Koenig, et al. (22) Filed: Feb. 17, 2011 U.S. Appl. No. 13/305,283, filed Nov.
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