A new generation of green alkyl polyglycosides has excellent performance

2018-01-28 10:52:29

A new generation of green alkyl glycosides is a nonionic surfactant that reacts with glucose and fatty alcohols or fatty acids in natural raw starch to form alkyl polyglycosides (APG) and glucose amide (APA), which are less irritating to humans. It has the characteristics of fast biodegradation, excellent performance and synergy with other surfactants.

Alkyl Polygly Cosides, developed by Henkel in Germany in the 1990s, can be used as an emulsifier, dispersant, wetting agent, admixture, solubilizer and defoamer in pesticides. The trade name Agrimsl PG is used in grass fast mixes and new glyphosate formulations, and has been promoted in countries such as the United States.

The use of surfactants as emulsifiers in pesticide emulsifiable concentrates is their primary application. Because the emulsifiable concentrate is generally a solvent which is insoluble in water, the emulsifier is added to directly emulsifie the pesticide into the water to form an O/W emulsion, and can prevent flocculation and delamination of the emulsion, and keep the formed emulsion in a stable state.

There are many kinds of commonly used emulsifiers, but mixed emulsifiers composed of polyoxyethylene alkylphenol or polyoxyethylene fatty alcohol and oil-soluble calcium dodecylbenzenesulfonate can usually obtain better emulsion. stability. Sometimes a small amount of EO/PO block copolymer surfactant can be added to improve the stability of the emulsion. The emulsifier used in the preparation of the emulsifiable concentrate is different from the emulsifier used in the EW. Surfactants having a stronger adsorption capacity are required in EW to obtain long-term stability of the emulsion, and high molecular weight surfactants and polymeric surfactants are available.

Mixed dosage forms are popular because they are convenient and ensure that the user uses the correct amount of various pesticide ingredients while avoiding the non-uniformities that typically occur during barrel mixing. It is a preparation in which a suspension mixed dispersion is prepared by using a solid pesticide which is insoluble in water and another liquid pesticide which is insoluble in water, using water as a medium, and is generally regarded as a combination of SC and EW. Commonly used surfactants mainly include emulsifiers, dispersants and thickeners. This type of molding not only has the problem of flocculation of particles and oil droplets in the SC and EW dosage forms, but also it is necessary to carry out various cold and heat storage tests in a wide range.