Process for obtaining an elastomer in solid phase starting from its polymer solution
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United States of America Patent
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Aug 28, 2012
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Nov 3, 2011
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Nov 5, 2009
filing date -
Nov 14, 2008
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Abstract
A process for obtaining an elastomer in solid phase from its polymer solution which comprises: (a) optionally pre-concentrating the polymer solution coming from the production system by a flash process; (b) subjecting the polymer solution to a concentrating stripping operation by water vapor in a mixing device comprising internal moveable mixing parts which transfer minimal mechanical energy to the solution in the form of friction heat; and (c) subjecting the concentrated polymer phase coming from (b) to devolatilization by mechanical energy and/or vapor flow to remove residual solvent.
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