Developing corresponding surfactants is the requirement of market internationalization

2021-09-10 16:01:53

The development of compound surfactants is suitable for the needs of a variety of pesticide formulations. At present, there are many studies on the compound system of 2 ~ 3 surfactants in China, and there are few studies on the compound system of more than three surfactants. The development of multi surfactant complex system is a new direction of dispersion system research.

In a certain period of time, EC is still the main part of pesticide preparations. The solvent of the new emulsion will be mainly vegetable oil and mineral oil, replacing organic solvents such as toluene and xylene. Therefore, the development of corresponding surfactants is the requirement of market internationalization.

As a strategic means of production, pesticide has a certain impact on the environment while it is used. Therefore, pesticide researchers continue to develop highly active compounds with novel structure and environment-friendly characteristics, while strengthening the research of surfactants, in order to develop environment-friendly dosage forms, improve the utilization rate of pesticides and reduce environmental pollution. Developed countries have developed a large number of products that tend to be ecological safety, no environmental pollution, complete biodegradation, strong functionality, good chemical and thermal stability and low cost. However, the research on surfactants in China is relatively backward. At present, it has also increased research in the following aspects to develop new surfactants.

The physical and chemical properties of surfactants have certain requirements for the environmental conditions, but through improvement, the range of environmental conditions can be expanded. For example, adding propylene oxide to fatty alcohol vinyl ether can significantly improve the fluidity of the product and reduce the requirements for ambient temperature during use. The pesticide emulsifiers 1601 and 1602 developed after modifying nongru 600 have a wider application range than nongru 600.

Biosurfactants refer to surfactants processed from natural or renewable resources, which are less irritating to human body and easy to biodegrade. At present, biosurfactants mainly include surfactants with oil group as hydrophobic group (such as a sulfonic acid fatty acid methyl ester, ester quaternary ammonium salt, etc.) and surfactants with carbohydrate as hydrophilic group (alkyl polyglycosides, etc.).

At present, the new varieties of biosurfactants mainly include APG (alkyl polyglycoside) produced by American Henkel company, which is used as emulsifier and efficacy enhancer in pesticide preparations. China's APG has completed the research and application of analogues methylglycoside derivatives 0gj and wgii; Mature technology has been formed in the development and application of citric acid and its salts; In terms of lignin, a series of products have also been developed, but the molecular weight is small, so technical transformation should be carried out to produce high molecular weight products; There is also a certain foundation in the development of castor oil surfactant, but the development depth is far from enough.