Method for the removal of isobutene oligomers from an...

Details Method for the removal of isobutene oligomers from an... Method for the removal of isobutene oligomers from an...

2011-06-07

2011-06-07

Boykin, Terressa M (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

C523S328000, C523S330000, C524S458000, C524S460000, C528S50200C, C528S503000

Reexamination Certificate

active

07956156

ABSTRACT:
A process is described for removing isobutene oligomers from an isobutene polymer by stripping the isobutene polymer with vapors of a saturated hydrocarbon having at least 8 carbon atoms and at least partly driving out the isobutene oligomers. Troublesome isobutene oligomers are substantially removed without impairing the reactivity of the isobutene polymer (expressed as the content of the methylidene double bonds).

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patent: 2003/0191257 (2003-10-01), Wettling et al.
patent: 02 06359 (2002-01-01), None
U.S. Appl. No. 12/597,009, filed Oct. 22, 2009, Hanefeld, et al.
U.S. Appl. No. 12/935,443, filed Sep. 29, 2010, Mattmann, et al.

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