Storage and dilution of stable aqueous dispersions
US6074986A · kind A · utility
Inventors
Key dates
| Filing date | Aug 2, 1996 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Aug 2, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A formulation e.g., a pesticidal formulation in the form of a dispersion comprising a continuous aqueous phase, and a discontinuous phase comprising a non-aaueous material capable of transport through the aqueous phase to cause Ostwald ripening of the dispersion, wherein there is contained within the discontinuous phase a pesticidal material, which may or may not be the said non-aqueous material, wherein the discontinuous phase comprises a stabiliser in an amount sufficient to depress migration of the non-aqueous material through the aqueous phase, and thereby diminish or prevent Ostwald ripening of the dispersion, characterised in that the stabiliser has a molecular weight of not more than 10,000, and is soluble in the discontinuous phase, but insoluble in and not transportable through the aqueous phase. The production of the formulation can be carried out in a metered in-line mixing plant, since the thermodynamics of the mixing process is such that the particle size tends to a predictable value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.