Surfactant systems for liquid aqueous preparations

US6667276B1 · kind B1 · utility

Assignee

• Hoechst Schering Agrevo GmbH · DE

Inventors

• Thomas Maier · Stockach, DE
• Jochen Wurtz · Bingen, DE

Key dates

• Filing date: Nov 24, 1998
• Grant date: Dec 23, 2003
• Expiry date: Nov 24, 2018

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N57/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to surfactant systems for liquid aqueous or aqueous-organic formulations comprising a mixture of one or more basic cosurfactants and one or more surfactants from the group of the acidic phosphoric esters. The surfactant system makes possible the preparation of stable liquid formulations for active compounds, the formulations comprising(a) one or more water-soluble active compounds (type (a)) and(b) optionally one or more water-insoluble active compounds (type (b)),(c) optionally organic solvents,(d) the abovementioned surfactant system and water.The formulations are either single-phase aqueous or aqueous-organic formulations of type-(a) active compounds, for example glufosinate-ammonium or glyphosate(salts), or they are microemulsions of type-(a) and type-(b) active compounds, for example diphenyl ether herbicides.