Suspension concentrate (SC)
Suspension Concentration (SC）
In recent years, with the deepening understanding of the hazards of emulsifiable pesticides, water-based formulations have been highly valued. According to the statistics of the world pesticide industry association, the proportion of EC in the world's pesticide preparations is very large, and the organic solvent in the environment is more than 1 million tons per year. In one hand, these non-pesticide active substances increase the cost of pesticide preparation, which consumes about billions of dollars every year in the world; on the other hand, a large number of organic solvents cause great damage to the environment. China is the second largest pesticide producer in the world, producing 900000~1 million tons of pesticide preparations every year. China's water-based formulations account for a small proportion of the total preparations. Compared with other major producers of pesticides, the structure of pesticide formulations in China is facing severe challenges, and the demand for new water-based formulations is also more urgent. In this context, water-based preparations, such as suspensions, microemulsions, water emulsions, and water-based agents, are widely concerned, and their development technology has become a hot spot. Related basic theoretical research, such as surfactant technology, nanoparticle technology, laser particle size and streaming potential detection technology, grinding technology and fluid mechanics, have also gradually extended to the field of pesticide, providing a necessary means and theoretical basis for further research on Suspension Concentration.
Pilarquim's original "three essence process" and "three essence guarantee" have raised the production process and quality level of China's Suspension Concentration to a new level. In cooperation with foreign preparation suppliers, Pilarquim has also made many breakthroughs in the research of additives. Make the quality indicators of Pilarquim Suspension Concentration catch up with imported products, which has been praised by users.
1. Overview of Suspension Concentration
Suspension Concentration, also known as water Suspension Concentration, colloidal suspension and concentrated Suspension Concentration, is a kind of important dosage form which represents the development direction of modern pesticide preparation technology. The basic principle is to disperse insoluble or water-insoluble raw materials into water under the action of surfactants and other auxiliaries and form a uniform and stable coarse suspension system. Suspensions are mainly composed of pesticides, wetting agents, dispersants, thickeners, antifreeze, pH adjustment agents, defoamer and water. Since the dispersing medium is water, the Suspension Concentration has the characteristics of low cost, production, storage and transportation and use safety, and can be mixed with water in any proportion, and is not affected by water quality and water temperature and is convenient to use. Compared with the pesticide formulation with organic solvent as the medium, it has the advantages of less environmental impact and less damage. In recent years, the development of microcapsule suspension and water-based suspension seed coating agent, although the names are different, but from the perspective of its dispersion principle, they also belong to the category of suspension agent, except that the former dispersion phase is microcapsule, and the latter has the function of forming membrane on the seed surface due to the introduction of film-forming agent on the basis of suspension agent.
2. Development status of Suspension Concentration
Suspension agent is a new type of pesticide formulation which has a short history of development and is in constant improvement. The emergence of this new dosage form provides a new opportunity for the production and application of solid pesticides which are difficult to dissolve in water and organic solvents.
The developed countries have developed the Suspension Concentration earlier and popularized faster. Since the development of suspension concentrate in China in 1970s, great progress has been made in formulation research, processing technology and variety and quantity of preparations. In recent years, the development of specific suspensions is very fast, such as the emergence of a number of new compound suspending seed coating agents, and the registration of dry suspensions, microcapsule suspensions and Suspension Concentrations has increased year by year.
As people pay more and more attention to the living environment, it has become a hot topic in the field of pharmaceutics to seek to reduce the risk of pesticides and their use through the innovation of preparation technology. The uneven distribution of pesticides is caused by the inappropriate use of technology and pesticide formulations. In the future comprehensive strategies for insecticide resistance, pesticide formulations and pesticide use technologies must be used as necessary components in drug resistance management research. Technological development factors are the most direct influence factors of promoting pesticide pollution-free. In recent years, suspension agent, seed coating agent, microencapsulation agent, microemulsion agent, water dispersing agent and other technologies are effective ways to make pesticide pollution-free based on modern preparation processing technology. Suspension Concentrations conform to the trend of pollution-free pesticides in reducing the amount of organic solvents, using and storing safely and conveniently, maintaining a long period of time, and producing no "three wastes"(waste of water, gas and rests) in production. Starting from the above significance, the water-based preparation represented by Suspension Concentration will become one of the important means to solve the problem of pesticide pollution.