CN-116762820-B - Stable and efficient cyhalothrin insecticidal composition and preparation method thereof

CN116762820BCN 116762820 BCN116762820 BCN 116762820BCN-116762820-B

Abstract

The application relates to the field of pesticide compositions, in particular to a stable and efficient cyhalothrin insecticidal composition and a preparation method thereof. The composition at least comprises 1-10wt% of cyhalothrin, 1-25wt% of a second active substance, 5-25wt% of a functional auxiliary agent and the balance of a solvent. The composition provided by the application is different from the existing water dispersible granule, emulsifiable concentrate and suspending agent of the cyhalothrin and acetamiprid composition, is a soluble solution composition with extremely high active ingredient content, has a drug effect obviously superior to that of a solid preparation, is more environment-friendly than the existing emulsifiable concentrate formulation, and has excellent market prospects in the pesticide field.

Inventors

ZHANG CHANGQING
YU DEMIAN
WANG CHENJIE
WAN NANA
SONG HUAITING
LIN PEIWANG
LIANG GUANFENG

Assignees

上海悦联生物科技有限公司
上海悦联化工有限公司

Dates

Publication Date: 20260512
Application Date: 20230615

Claims (2)

1. A stable and efficient cyhalothrin insecticidal composition is characterized by comprising 8wt% of cyhalothrin, 12wt% of acetamiprid, 20.5wt% of a functional auxiliary agent, 10wt% of a cosolvent and the balance of a solvent; the stable and efficient cyhalothrin insecticidal composition is in the form of a soluble solution; the functional auxiliary agent is 20% of an emulsifying agent and 0.5% of a pH regulator, and the pH regulator is glacial acetic acid; the cosolvent is propylene carbonate, the solvent is ethanol, and the mass ratio of the cosolvent to the solvent is 1:4.95; The emulsifier is a mixture of fatty alcohol polyoxyethylene ether and a block copolymer, and the mass ratio of the fatty alcohol polyoxyethylene ether to the block copolymer is 16:4.
2. A preparation method of the stable and efficient cyhalothrin insecticidal composition according to claim 1 is characterized by comprising the following steps of (1) adding a solvent into a preparation kettle, adding cyhalothrin and a second active substance, stirring for 30-60 min until complete dissolution, and (2) mixing a cosolvent and a functional auxiliary agent, and filtering after the completion of mixing.

Description

Stable and efficient cyhalothrin insecticidal composition and preparation method thereof Technical Field The invention relates to the field of pesticide compositions (A01N 27/00), in particular to a stable and efficient cyhalothrin insecticidal composition and a preparation method thereof. Background The cyhalothrin is also called cyhalothrin, and is an insecticidal raw material capable of avoiding, knockdown and poisoning insects by inhibiting the conduction of the axial position of the insects. In recent years, since cyhalothrin itself is excellent in insecticidal broad spectrum, high insecticidal activity and rainfastness, it is widely used in insecticidal pesticide compositions. In the prior art, chinese patent CN111096329a provides a microcapsule suspension containing cyhalothrin and neonicotinoid insecticidal active ingredient, which claims that the insecticidal property of the composition is effectively improved by the compounding of synergistic auxiliary agent and the improved method of the preparation process, and the condition in the process of preparing microcapsule preparation is milder, the process is easier to control, thereby meeting the requirement of continuous industrial production. However, microcapsule preparations are easy to break capsules, so that the microcapsule preparations are not suitable for being used with other pesticide products, the application field and the environment of the microcapsule preparations are limited, the melting point of the cyhalothrin is low, the cyhalothrin is not suitable for being made into a suspending agent for use in the actual preparation process, meanwhile, the system viscosity of the suspending preparation is large, the fluidity is poor, the layering precipitation and sediment agglomeration stacking phenomena are easy to occur in the storage process, and the risks of composition stability and drug effect reduction caused by the translocation phenomenon of the cyhalothrin are not paid attention to. Therefore, in order to solve the problems, the application provides a stable and efficient cyhalothrin insecticidal composition, a more stable soluble liquid insecticidal composition is obtained, and the translocation phenomenon of cyhalothrin in a system can be effectively inhibited, so that the decline of the drug effect and the stability is avoided. Disclosure of Invention The application provides a stable and efficient cyhalothrin insecticidal composition, which at least comprises 1-10wt% of cyhalothrin, 1-25wt% of a second active substance, 5-25wt% of a functional auxiliary agent, 5-15wt% of a cosolvent and the balance of a solvent. As a preferred scheme, the second active substance is any one of thiamethoxam, acetamiprid, clothianidin, imidacloprid, nitenpyram and flonicamid. As a preferred embodiment, the second active is thiamethoxam or acetamiprid. As a preferred embodiment, the second active is acetamiprid. As a preferable scheme, the mass ratio of the cyhalothrin to the acetamiprid is 7-10:11-15. As a preferable scheme, the mass ratio of the cyhalothrin to the acetamiprid is 8-9:12-14. As a preferable scheme, the mass ratio of the cyhalothrin to the acetamiprid is 8:12. As a preferable scheme, the functional auxiliary agent is at least one of an emulsifying agent, an antifreezing agent and a pH regulator. As a preferable scheme, the emulsifier is a mixture of fatty alcohol polyoxyethylene ether and a block copolymer. As a preferable scheme, the mass ratio of the fatty alcohol-polyoxyethylene ether to the block copolymer is 14-18:2-6. As a preferable scheme, the mass ratio of the fatty alcohol-polyoxyethylene ether to the block copolymer is 16:4. As a preferable scheme, the pH adjuster is at least one of phosphoric acid, hydrochloric acid, glacial acetic acid, sulfuric acid and citric acid. As a preferred embodiment, the pH adjuster is glacial acetic acid or citric acid. As a preferred embodiment, the pH adjuster is glacial acetic acid. As a preferable scheme, the cosolvent is any one of propylene carbonate, dimethyl carbonate, diethyl carbonate and ethylmethyl carbonate. As a preferable scheme, the solvent is at least one of deionized water, N-dimethyl octanamide, N-dimethyl decanamide, ethylene glycol butyl ether acetate, N-dimethyl amide, N-dimethyl propionamide, cyclohexanone, solvent oil, dimethyl sulfoxide, N-butanol, ethanol and methanol. As a preferable scheme, the functional auxiliary agent at least comprises an emulsifier and a pH regulator, wherein the cosolvent is propylene carbonate, the solvent is ethanol, and the mass ratio of the cosolvent to the solvent is 1-2:4-6. As a preferable scheme, the ratio of the propylene carbonate to the ethanol to the glacial acetic acid is 1:4.2-5:0.04-0.06. In the application, when the specific solvent and the pH regulator are adopted for compounding and use, not only the translocation phenomenon of the cyhalothrin is inhibited, but also the stability of the whole composition system is further impro