Organic silicon pesticide synergist and preparation method thereof

A technology of organosilicon and synergist, which is applied in the field of preparation of polyether-modified trisiloxane, can solve the problems of reduced yield and achieve the effects of less side reactions, high yield, and good physiological safety performance

Active Publication Date: 2010-06-09
黄山市强力化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

lead to lower yield

Method used

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  • Organic silicon pesticide synergist and preparation method thereof
  • Organic silicon pesticide synergist and preparation method thereof
  • Organic silicon pesticide synergist and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] a. Synthesis of special polyether:

[0062] 1.1

[0063] Put 81g of sodium methoxide and 162g of methanol into a 1L stainless steel reaction kettle to completely dissolve the sodium methoxide, then add 550g of ethylene oxide, stir at high speed, heat up to 100°C, and the pressure of the autoclave is 1 to 2.0 atm. With the progress of the reaction, the pressure gradually decreased. When the pressure in the kettle was 1.2 atm, the temperature was lowered to normal temperature to obtain the sodium salt of polyoxyethylene ether end-capped with methoxy groups:

[0064]

[0065] 1.2 Move the obtained polyoxyethylene ether sodium salt to the normal pressure reaction kettle, after steaming the methanol, add 160 g of ethylene dichloride in the kettle, stir at a high speed, be warming up to the reflux temperature, react for 2.5 hours, steam out The reacted dichloroethane was decolorized and filtered to obtain the chlorine-terminated polyether:

[0066]

[0067] C, the syn...

Embodiment 2

[0076] a1. Synthesis of special polyether:

[0077] 1.1 Add 27g of sodium methoxide into the autoclave, then add 60g of methanol and stir to fully dissolve it, add 210g of propylene oxide, stir at high speed, heat up to about 105°C, and the pressure in the kettle rises to 1.7atm. With the progress of the reaction, the pressure gradually decreased. When the pressure dropped to 1.1-1.2 atm, it was lowered to room temperature, then 201 g of ethylene oxide was added, and the temperature was raised to about 110 °C. The pressure in the kettle was 1.8-2.0 atm. When the pressure in the kettle drops to 1.1 to 1.2 atm, the temperature of the kettle is lowered to room temperature, and methanol is evaporated to obtain a methanol solution of methoxy-terminated epoxy polyether sodium salt:

[0078]

[0079] 1.2 The obtained methoxy-terminated epoxy polyether sodium salt (390g) was moved to the normal pressure reaction kettle, after steaming the methanol, 55g of ethylene dichloride was ad...

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Abstract

The invention discloses an organic silicon pesticide synergist and a preparation method thereof, the structural formula of the synergist is as follows, wherein a is equal to 5-50, b is equal to 0-25; the structural formula of R1 is that R1 is equal to -CH3, -H; and the structural formula of R2 is that R2 is equal to -H3, -CH3; -C4H9; -O(O)CCH3. The organic silicon pesticide synergist has the advantages of very low liquid surface tension which is about 20-22mN/m, capability of being used as a super extender, a penetrating agent and an emulsifying dispersant, good stability within an extensive pH value range, no toxicity or harm, good physiological safety performance, being applicable to a variety of herbicides, insecticides, fungicides, plant growth regulators, bio-pesticides and foliar fertilizers, saving the pesticide consumption by more than 40% and saving the water consumption by more than one third; and the preparation method of the organic silicon pesticide synergist has the advantages of fewer side effects and high yield.

Description

technical field [0001] The invention relates to an organosilicon pesticide synergist and a preparation method thereof, in particular to a preparation method of polyether-modified trisiloxane. Background technique [0002] As we all know, most of the pesticides currently used in the world, including herbicides, insecticides, fungicides, plant growth regulators, etc., have varying degrees of toxicity, and pesticide residues in agricultural products have become a worldwide public hazard. With the improvement of the resistance of agricultural pests and fungi, the use of various pesticides is required to increase, which is a serious threat to human health. The most commonly used are organic surfactants, penetrants, wetting agents, etc. Since the surface tension of these organic surfactants is mostly above 25mN / m, their synergistic effect is not very obvious until the 1970s. People noticed that organosilicon surfactants were very active in the 1980s, and the research on organosil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N55/10C07F7/10C08G65/336C08G65/333
Inventor 邱万军叶光华
Owner 黄山市强力化工有限公司
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