Aqueous silica-based nanocomposite polymer dispersion
US7985789B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2007 |
| Grant date | Jul 26, 2011 |
| Priority date | — |
| Expiry date | Apr 29, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/1804
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns an aqueous specific silica-based nanocomposite polymer dispersion, a method for preparing same, a coating composition, in particular protective, containing said dispersion, for applications requiring high anti-corrosive, anti-abrasive and chemical resistance performances. It concerns an aqueous nanocomposite polymer dispersion obtainable by an emulsion polymerization process of at least one monomer composition in the presence of at least one aqueous silica nanoparticle dispersion, said monomer composition being added at least in one step into the reactor already containing the aqueous silica nanoparticle dispersion, said aqueous silica nanoparticle dispersion having an anionic character and being stable in a pH range between 2 to 10, and said emulsion polymerization being performed in the presence of at least one organic initiator free of any ionic group and in the absence of any monomer or cationic dispersant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.