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US 7,888,410 B2Granted
Method of making porous particles
AssigneeEastman Kodak Company
InventorsMridula Nair, Xiqiang Yang, Tamara K. Jones, James G. Popowych
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Abstract
The present invention is a method for the preparation of porous particles that includes dissolving a polymer material in a first organic solvent and adding a second organic solvent and nonionic organic polymer particles to form an organic phase. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer to form a dispersion and the dispersion is homogenized. The first and second organic solvents are evaporated and the product is recovered.
Claims10
A method for the preparation of porous particles comprising the steps of:
- a) dissolving a polymer material in a first organic solvent and adding a second organic solvent and nonionic organic polymer particles to form an organic phase, where the second organic solvent is a poor solvent for the binder polymer and is less volatile than the first organic solvent;
- b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer to form a dispersion and homogenizing the dispersion;
- c) evaporating the first and second organic solvents and recovering a product comprising porous particles, wherein pores in the porous particles are stabilized by the nonionic organic polymer particles.
Dependencies are inferred from the claim text.