| US 7,468,413 B2 | ||
| Rare earth aggregate formulation using di-block copolmers | ||
| Kazuhiko Yokota, Paris (France); Jean-Francois Berret, Sevres (France); Bruno Tolla, Paris (France); and Mikel Morvan, Princeton, N.J. (US) | ||
| Assigned to Khodia Inc., Cranbury, N.J. (US) | ||
| Filed on Jan. 25, 2005, as Appl. No. 11/42,647. | ||
| Claims priority of provisional application 60/540430, filed on Jan. 30, 2004. | ||
| Prior Publication US 2005/0176863 A1, Aug. 11, 2005 | ||
| Int. Cl. C08K 3/10 (2006.01); C08L 33/02 (2006.01) | ||
| U.S. Cl. 524—403 [524/556] | 15 Claims |
| 1. A method for controlling aggregation of rare earth base particles comprising:
complexing cationic or anionic rare earth base particles with block copolymers consisting of two blocks, A and B, wherein
block A is anionic if the particles are cationic, and block A is cationic if the particles are anionic, to form a stable complex
of rare earth aggregates.
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