| US 7,514,481 B2 | ||
| Polymer electrolytes crosslinked by e-beam | ||
| Michael A. Yandrasits, Hastings, Minn. (US); Steven J. Hamrock, Stillwater, Minn. (US); and Naiyong Jing, Woodbury, Minn. (US) | ||
| Assigned to 3M Innovative Properties Company, Saint Paul, Minn. (US) | ||
| Filed on Jan. 29, 2007, as Appl. No. 11/668,270. | ||
| Application 11/668270 is a division of application No. 10/712361, filed on Nov. 13, 2003, granted, now 7,179,847. | ||
| Prior Publication US 2007/0142563 A1, Jun. 21, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C08F 2/46 (2006.01) | ||
| U.S. Cl. 522—156 [522/1; 522/2; 522/150; 522/155; 522/184; 522/186; 522/187; 522/189; 427/496; 427/498; 427/501] | 26 Claims |
| 1. A method of making a crosslinked polymer comprising the steps of:
a) providing a highly fluorinated fluoropolymer comprising pendent groups which include a group according to the formula —SO2X, where X is F, Cl, Br, OH or —O−M+, where M+ is a monovalent cation; and
b) exposing said fluoropolymer to electron beam radiation so as to result in the formation of crosslinks wherein the step
of exposing said fluoropolymer to electron beam irradiation comprises exposing said fluropolymer to greater than 4 Mrad of
electron beam radiation.
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