Oil-based suspending agent and preparation method and purpose thereof

Abstract

The invention discloses an oil-based suspending agent and a preparation method and a purpose thereof. The oil-based suspending agent comprises the following components: a component A of at least a solid spirotetramat active matter under room temperature; a component B of at least one fatty acid ester having a general formula of R1-COO-R2 and / or R1-COO-R2-OOC-R1; a component C of at least a nonionic surfactant and / or at least an anionic surfactant; and a component D of any one or at least two additives selected from an emulsifier, an antifoaming agent, an antiseptic, an anti-oxidant, a colouring agent or an inertia filling material. The oil-based suspending agent can effectively control the particle size increase problem of spirotetramat during a storage process, greatly inhibits the particle size increase of spirotetramat suspension particles, and increases the spirotetramat activity, compared with a conventional preparation, the higher activity is obtained, and the usage amount of spirotetramat is reduced.

Description

technical field [0001] The invention belongs to the field of pesticides, and relates to an oil-based suspending agent and its preparation method and application. Background technique [0002] Spirotetramat is a tetronic acid compound developed by Bayer, and it is one of the modern insecticides with two-way systemic conduction performance. The compound can move up and down throughout the plant to reach the foliage and bark, thereby controlling pests such as on the inner leaves of lettuce and cabbage and on the bark of fruit trees. This unique systemic property protects young stems, leaves and roots from the growth of pest eggs and larvae. Another feature is its long-lasting effect, which can provide effective control for up to 8 weeks. [0003] Because spirotetramat has two-way systemic conductivity, it is the best choice to prepare spirotetramat into an oil-based suspension. It is known to disclose a wide variety of anhydrous suspension concentrates of active agrochemical...

AI Technical Summary

Problems solved by technology

However, this anhydrous suspension concentrate presents a serious risk of particle size growth during storage

[0005] CN100435637C discloses an oil-based suspension concentrate in which, in addition to active agrochemical substances, alkanol alkoxylates and nonionic and / or anionic surfactants which are solid at room temperature, vegetable or mineral oils are also used , there is also a serious risk of particle size growth

[0006] CN100548124C discloses an oil-based suspension, which contains active substances of the formula I structure, penetrants and nonionic and / or anionic surfactants, but also uses vegetable oils, and there is also a serious risk of particle size growth

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