Patent · US Active

Well defined, highly crosslinked nanoparticles and method for making same

US9115222B2 · kind B2 · utility

7Cited by
208References
23Claims
0Family size

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Key dates

Filing dateDec 28, 2010
Grant dateAug 25, 2015
Priority date—
Expiry dateAug 29, 2032

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T428/2982
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A method is provided for making nanoparticles, including the steps of: combining a hydrocarbon solvent and an aprotic, polar co-solvent, a mono-vinyl aromatic monomer, polymerization initiator, a solution stabilizer, and a first charge of a cross-linking agent. Subsequently, a second charge of cross-linking agent is added. The nanoparticles have an average diameter of 5 nanometers to about 10,000 nanometers. Spherical nanoparticles are also provided that include a cross-linking agent comprising 30% to 60% by weight of the combined weight of a mono-vinyl aromatic species and the cross-linking agent. The spherical nanoparticles also meet the following equation:0.90≦(D1/D2)≦1.1

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.