Organically modifid silica and use thereof
US8106229B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2006 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Aug 20, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Organosilane-modified nanoparticles of silica, having a particle size of no more than 1 micron, in which the organosilane resides throughout the entire volume of the nanoparticles and not just at the surfaces of the nanoparticle. The nanoparticles may be in a colloidal solution. They may be prepared by hydrolyzing an alkali silicate under acidic conditions to obtain a silicic acid dispersion, followed by adding an organosilane having hydroxyl and/or hydrolyzable groups to the dispersion under acid conditions; and then raising the pH of the dispersion to at least eight to form the nanoparticles. They may be used in an effective paint primer/protective coating formulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.