Fully compatible surfactant-impregnated water-soluble fertilizer; concentrate; and use
US6460290B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jul 11, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05G3/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Solid surfactant-impregnated, water-soluble fertilizer compositions are disclosed together with aqueous concentrates made therefrom. The use of dilute aqueous compositions made from said concentrates to enhance the rewetting of water uniformity and nutrient retention characteristics of initially untreated plant culture media is also disclosed.The fertilizer composition solids are friable and are composed of from 65 to 99 weight percent water-soluble fertilizer; and from 1 to 35 weight percent of a surfactant system comprising water-soluble nonionic surfactant and alkyl polyglycoside in a weight ratio of from less than 2:1 to 1:5. When these solid compositions are dissolved in water to form concentrates having from 20 to 50 weight percent fertilizer, the concentrates are both single phased and extremely stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.