Method of formation of shape-retentive aggregates of gel particles and their uses
US7811605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2004 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | May 4, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a method of forming shape-retentive aggregates of gel particles in which the aggregates are held together by non-covalent bond physical forces such as, without limitation, hydrophobic-hydrophilic interactions and hydrogen bonds. The method comprises introducing a suspension of gel particles in a polar liquid at a selected concentration, wherein the gel particles have an absolute zeta potential, into a medium in which the absolute zeta potential of the gel particles is decreased, resulting in the gel particles coalescing into the claimed shape-retentive aggregate. This invention also relates to uses of the method of formation of the shape-retentive aggregates of gel particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.