| US 7,601,769 B2 | ||
| Multilayered chromonic structures | ||
| Sanat Mohanty, Minneapolis, Minn. (US); Hassan Sahouani, Hastings, Minn. (US); and Cristin E. Moran, Woodbury, Minn. (US) | ||
| Assigned to 3M Innovative Peroperties Company, St. Paul, Minn. (US) | ||
| Filed on Dec. 19, 2005, as Appl. No. 11/275,202. | ||
| Prior Publication US 2007/0141351 A1, Jun. 21, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C08K 9/00 (2006.01); C09D 5/16 (2006.01); C08L 83/00 (2006.01); B01J 13/00 (2006.01); C09D 5/02 (2006.01); C08F 8/30 (2006.01); C08L 67/00 (2006.01) | ||
| U.S. Cl. 523—206 [523/122; 523/200; 523/201; 524/557; 524/556; 524/555; 524/601] | 21 Claims |
| 1. A method of making a multilayered chromonic structure comprising:
(a) preparing a first aqueous mixture comprising (i) a first continuous water-soluble polymer phase and (ii) a first discontinuous
chromonic phase comprising a chromonic material, to form chromonic nanoparticles;
(b) non-covalently crosslinking the resulting chromonic nanoparticles with a multivalent cation salt;
(c) dispersing the resulting crosslinked chromonic nanoparticles in a composition comprising a chromonic material to form
a chromonic nanoparticle dispersion; and
(d) preparing a second aqueous mixture comprising (i) a second discontinuous chromonic phase comprising the chromonic nanoparticle
dispersion and (ii) a second continuous water-soluble polymer phase, to encapsulate the chromonic nanoparticles;
wherein at least one of the first discontinuous chromonic phase and the second discontinuous chromonic phase further comprises
a guest compound.
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