Porous particles, their aqueous dispersions, and method of preparation
US6632531B2 · kind B2 · utility
51Cited by
15References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Dec 13, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of forming, by polymerization in an aqueous dispersion at pressures in excess of one atmosphere, a plurality of porous particles having at least one polymeric phase and, additionally, having a pore filling phase containing a fugitive substance is disclosed. Replacement of the fugitive substance with a gas is further disclosed. Gas-filled porous particles and their aqueous dispersions are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.