Polymeric particles, their manufacture and uses
US4849484A · kind A · utility
257Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F265/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A slow release composition comprises particles of a cross linked polymeric matrix in which a water soluble reagent is dispersed, and the reagent is anionic, generally being a low molecular weight anionic water soluble polymer, and the matrix is a cationic, highly cross linked, polymer formed from a water soluble monomer or monomer blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.