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 by 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).