Porous particles and methods of making them
US9029431B2 · kind B2 · utility
5Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2012 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Sep 16, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Porous particles can be prepared using an evaporative limited coalescence process in which one or more discrete cavities are stabilized within the continuous polymeric solid phase of the porous particles. The one or more discrete cavities have inner walls and are dispersed within the continuous polymeric solid phase. The porous particles further comprise a cavity stabilizing hydrocolloid on the inner walls of the one or more discrete cavities, and an amphiphilic (low HLB) block copolymer that is disposed at the interface of the discrete cavities and the continuous polymeric solid phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.