Patent · US Active

Aqueous silica-based nanocomposite polymer dispersion

US7985789B2 · kind B2 · utility

8Cited by
4References
29Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 22, 2007
Grant dateJul 26, 2011
Priority date
Expiry dateApr 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.