| US 7,531,161 B2 | ||
| Boehmite and polymer materials incorporating same | ||
| Hui Tang, Worcester, Mass. (US); Christopher L. Mirley, Winthrop, Mass. (US); and Ralph Bauer, Niagara Falls (Canada) | ||
| Assigned to Saint-Gobain Ceramics & Plastics, Inc., Worcester, Mass. (US) | ||
| Filed on Mar. 12, 2007, as Appl. No. 11/685,000. | ||
| Application 11/685000 is a continuation of application No. 10/414590, filed on Apr. 16, 2003, granted, now 7,189,775. | ||
| Claims priority of provisional application 60/374014, filed on Apr. 19, 2002. | ||
| Prior Publication US 2007/0148083 A1, Jun. 28, 2007 | ||
| Int. Cl. C01F 7/04 (2006.01) | ||
| U.S. Cl. 423—625 [423/111; 117/6] | 17 Claims |
| 1. A method of forming boehmite particulate material, comprising:
providing boehmite precursor and boehmite seeds in water to form an aqueous suspension; and
hydrothermally treating the aqueous suspension to convert the boehmite precursor into boehmite particles having a needle-shaped
morphology, an aspect ratio of at least 3:1, wherein aspect ratio is the ratio of longest dimension to next largest dimension
at least 3:1, and a particle size within a range of 50 to 2000 nm, wherein the boehmite seeds provide a nucleation site for
the growth of the boehmite particles.
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