Seed coating agent, and preparation method and application

Abstract

The invention provides a seed coating agent. The seed coating agent is prepared from the following raw materials by mass: 5 to 20 parts of liquefied fiber polysaccharide, 0 to 20 parts of an active component of a pesticide, 0 to 0.5 part of triethylene diamine, 0 to 0.5 part of a silicon surfactant, 0 to 0.25 part of a tin catalyst and 5 to 20 parts of a diisocyanate compound. A preparation method for the seed coating agent comprises the following steps: uniformly mxing the liquefied fiber polysaccharide with a part of the active component of the pesticide so as to obtain a preparative solution A; uniformly mixing the preparative solution A with triethylene diamine, the silicon surfactant and the tin catalyst so as to obtain a preparative solution B; uniformly mixing the diisocyanate compound with the rest active component of the pesticide so as to obtain a preparative solution C; and uniformly mixing the preparative solution B with the preparative solution C so as to obtain the seed coating agent. Due to addition of the liquefied fiber polysaccharide, the seed coating agent with the liquefied fiber polysaccharide as a raw material has good biodegradability; and the seed coating agent has the advantages of rapid and simple operation, controllable release speed, etc.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a seed coating agent and its preparation method and application. Background technique [0002] The seeds in the dry or wet state are wrapped with a pesticide composition containing a binder to form a protective layer with certain functions and coating strength outside the seeds. This process is called seed coating. Combination substances are called seed coatings. [0003] The use of seed coating agents to coat seeds can promote the standardization, pelletization, and commercialization of improved varieties. After coating with seed coating agents, the quality of seeds can be improved, so that the emergence of seedlings is guaranteed to be complete, complete, and strong, and seeds can be saved at the same time; it can also prevent and control diseases. Insects, rodents and deficiency diseases, the coated seeds are sown into the soil, the seed coating forms a barrier around the ...

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Problems solved by technology

[0006] The above-mentioned patents require the use of aromatic hydrocarbon solvents in the preparation process of microcapsule suspensions, which increases the environmental pressure; and polyurethane is used as the wall material, which has poor biodegradability, and it is easy to cause unstable or non-release of pesticide active ingredients.

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