发明名称 |
LOWER-ENERGY PROCESS FOR PREPARING PASSIVATED INORGANIC NANOPARTICLES |
摘要 |
<p>The disclosure is directed to a method for reducing the chemical activity and photo activity of titanium dioxide nanoparticles comprising adding an amorphous alumina-stabilizing agent; specifically an anion, such as citric acid, to an aqueous slurry of the titanium dioxide nanoparticles; treating the aqueous slurry with a source of alumina, such as a solution of sodium aluminate, to form alumina- treated titanium dioxide nanoparticles; recovering the alumina-treated inorganic nanoparticles, wherein the nanoparticles have a particle size of about 50 to about 300 nm; and milling the nanoparticles to form nanoparticles having a particle size about 15 % smaller than silica-treated inorganic nanoparticles milled under similar conditions. The titanium dioxide nanoparticles described herein are useful in cosmetic, coating and thermoplastic compositions.</p> |
申请公布号 |
CA2546309(A1) |
申请公布日期 |
2006.11.23 |
申请号 |
CA20062546309 |
申请日期 |
2006.05.11 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
FRERICHS, SCOTT RICKBEIL;SPAHR, DOUGLAS ERIC;MORRISON, WILLIAM HARVEY, JR. |
分类号 |
C09C3/06;A61K8/29;A61Q17/04;C09D5/33 |
主分类号 |
C09C3/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|