Method for fractionating soluble polymers and colloidal particles
US4280923A · kind A · utility
20Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1978 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Dec 18, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Colloidal particles are fractionated by size and dissolved polymers are fractionated by molecular weight by passing a polar solvent dispersion containing one or both through a bed of surface-bonded particles wherein the particles consist of a nonswellable inert core with a polar solvent-swellable surface coating of bonded organic polymer. The core can be either an insoluble cross-linked organic polymer gel or an inorganic solid such as silica or alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.