US 9,809,658 B2
Fluoropolymer compositions and purification methods thereof
Klaus Hintzer, Kastl (DE); Michael Juergens, Moenchengladbach (DE); Gunther J. Kaempf, Altoetting (DE); Harald Kaspar, Burgkirchen (DE); Kai H. Lochhaas, Neuotting (DE); Andre Streiter, Muehldorf am Inn (DE); Oleg Shyshkov, Burgkirchen (DE); Tilman C. Zipplies, Burghausen (DE); and Herbert Koenigsmann, Burgkirchen (DE)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Filed on Aug. 23, 2016, as Appl. No. 15/244,148.
Application 15/244,148 is a division of application No. 13/995,615, granted, now 9,453,086, previously published as PCT/US2011/066456, filed on Dec. 21, 2011.
Claims priority of application No. 1021790.9 (GB), filed on Dec. 23, 2010.
Prior Publication US 2016/0362508 A1, Dec. 15, 2016
Int. Cl. C08F 6/00 (2006.01); C02F 1/461 (2006.01); C02F 1/26 (2006.01); C08F 14/08 (2006.01); C08F 14/18 (2006.01)
CPC C08F 6/003 (2013.01) [C02F 1/26 (2013.01); C02F 1/461 (2013.01); C08F 14/08 (2013.01); C08F 14/18 (2013.01); C02F 2001/46138 (2013.01); C02F 2001/46147 (2013.01); C08F 2800/10 (2013.01); Y02P 20/582 (2015.11)] 16 Claims
1. A method of purifying a product comprising the following steps
(i) providing a crude product comprising at least one low molecular weight fluoroorganic compounds wherein the low molecular weight fluoroorganic compounds is partially fluorinated and comprises a polar group and/or a reactive group, wherein the crude product is substantially free of a fluorinated emulsifier;
(ii) extracting an impurity from the product using water to form an extract,
(iii) contacting the extract with a radical-forming process to degrade the low molecular weight fluoroorganic compounds into carbon dioxide, water, fluorine ions, and optionally cations; and
(iv) using the water from step (iii) in step (ii).