Division of a polyarylene ether solution

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United States of America Patent

PATENT NO 9809686
APP PUB NO 20160159990A1
SERIAL NO

14904614

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Abstract

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The invention relates to a process for producing polyarylene ether beads from a polyarylene ether solution, comprising the steps of

    i) dividing the polyarylene ether solution in a division apparatus which is made to vibrate with a frequency of 10 to 1400 Hz to obtain droplets,ii) transferring the droplets into a precipitation bath to form polyarylene ether beads in the precipitation bath which (A) comprises at least one aprotic solvent (component (1)) and at least one protic solvent (component (2)),(B) has a temperature of 0° C. to Tc, where the critical temperature Tc in [° C.] can be determined by the numerical equation Tc=(77−c)/0.58 in which c is the concentration of component (1) in the precipitation bath in [% by weight] and(C) has component (1) in concentrations of 5% by weight to cc, where the critical concentration cc in [% by weight] can be determined by the numerical equation cc=77−0.58*T in which T is the temperature in the precipitation bath in [° C.], wherethe percentages by weight are each based on the sum of the percentages by weight of component (1) and of component (2) in the precipitation bath.

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Patent Owner(s)

Patent OwnerAddress
BASF SELUDWIGSHAFEN GERMANY LUDWIGSHAFEN RHINELAND-PALATINATE

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Erbes, Joerg Karlsruhe, DE 13 42
Gramlich, Simon Hirschberg, DE 15 23
Kortekamp, Tobias Mannheim, DE 11 66
Krueger, Marco Mannheim, DE 9 3
Muessig, Stefan Ludwigshafen, DE 11 14
Schneider, Cecile Frankenthal, DE 7 40
Steffen, Markus Maikammer, DE 7 96
Ulzhoefer, Angela Ludwigshafen, DE 3 11
Wiedemann, Alexandra Weisenheim am Berg, DE 6 6

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