Hydrophobic-treated metal oxide
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- CABOT CORP
- Publication Date
- 2008-03-20
- Estimated Expiration
- Not applicable · inactive patent
Abstract
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This patent application claims the benefit of U.S. Provisional Patent Application No. 60 / 844,828, filed Sep. 15, 2006, which is incorporated by reference.BACKGROUND OF THE INVENTION
[0002] Hydrophobic metal oxide particles possess physical properties that are useful in a number of applications requiring a high degree of dispersibility. Some hydrophobic metal oxide particles have physical properties that are desirable for use in toner compositions.
[0003] Untreated metal oxide particles are hydrophilic due to the presence of polar groups, such as hydroxyl groups (-OH), on the surface of the untreated silica particles. By treating hydrophilic metal oxide particles, the hydrophilic nature of the particles can be reduced, thereby imparting varying degrees of hydrophobicity to the particles.
[0004] Many different methods are known for treating the surface of metal oxide particles. However, the direct treatment of an aqueous dispersion of metal oxide...