Lignin-based microparticles for the controlled release of agricultural actives
US9445599B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2008 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Jul 25, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N55/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of producing lignin-based matrix microparticles for the controlled release of an agricultural active includes forming an emulsion of an organic solution in an aqueous solution, wherein the organic solution contains a lignin derivative and an agricultural active in a volatile organic solvent and the aqueous solution contains an emulsifier; and removing the organic solvent, thereby producing microparticles having a matrix comprising the lignin derivative within which the agricultural active is distributed. Small, spherical lignin-based matrix microparticles that release an agricultural active at a controlled rate are described, as are plants and plant propagation materials that are treated with such microparticles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.