Sustained release silica microcapsules
US9561485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2010 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Dec 6, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J13/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a microcapsule exhibiting desirable sustained-release properties, which microcapsule comprises a core material comprising an active ingredient encapsulated within a silica shell, characterized in that the outer surface of such silica shell has a layer of a metal selected from Group 2a, Group 8, Group 2b or Group 3a of the Periodic Table bound thereto. In other aspects this invention relates to a method of making such a microcapsule; a pesticidal composition comprising microcapsules comprising a pesticidal active ingredient and a suitable carrier; and to a method of controlling pests comprising applying an effective amount of such a pesticidal composition to a locus where pests are or are expected to be present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.