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Disilane surfactant, preparation thereof and use thereof

A technology of surfactant and silyne, which is applied in the field of agricultural chemicals, can solve the problems of undiscovered reports on the preparation and application of silyne surfactants, failure to meet requirements, easy hydrolysis of silicone surfactants, etc., and achieve good resistance The effects of rain scourability, excellent defoaming performance, and excellent pore permeability

Inactive Publication Date: 2010-02-24
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, even if it is used in combination with acetylene glycol surfactants, it still cannot fundamentally solve the problem that silicone surfactants are easy to hydrolyze, so it cannot meet the requirements of pesticide formulations for surfactants.
So far, there have been no reports on silyne surfactants and their preparation and application

Method used

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  • Disilane surfactant, preparation thereof and use thereof
  • Disilane surfactant, preparation thereof and use thereof
  • Disilane surfactant, preparation thereof and use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] The synthesis of example 1 silyne surfactant 1#

[0046] 1.1. Synthesis of vinyl-terminated acetoacetate (code 1#A)

[0047]Add 496 grams (1 mole) of terminal vinyl ether (a=8, b=1), 195 grams (1.5 moles) of acetoacetic acid in the four-neck flask equipped with stirring, thermometer, rectifying tower device and nitrogen device Ethyl ester and 5 grams of polyferric sulfate catalyst are heated up to 80-120°C, and the by-product ethanol is continuously distilled from the top of the tower. After 6 hours the reaction was complete. The polyferric sulfate catalyst was separated by filtration while hot. The filtrate was concentrated in vacuo to remove unreacted ethyl acetoacetate and residual ethanol to obtain 574.2 g of vinyl-terminated acetoacetate with a yield of 99%, a colorless liquid, and a purity of 98.6%.

[0048] 1.2. Synthesis of vinyl-terminated acetylenic diol (code 1#B)

[0049] Add 500 milliliters of MTBE (methyl tert-butyl ether), 100 grams of potassium hydro...

example 2

[0052] The synthesis of example 2 silyne surfactant 2#

[0053] 2.1. Synthesis of vinyl-terminated acetoacetate (code 1#A)

[0054] Feeding and operation are the same as Example 1.1.

[0055] 2.2. Synthesis of vinyl-terminated alkyne diol (code 2#B)

[0056] Replace 4-methyl-2-pentanone with 21.5 g (0.25 mole) of 3-methyl-2-butanone, and the rest of the addition and operation are the same as in Example 1.2. 143.6 g of ethylene-terminated acetylenic diol was obtained, with a yield of 83%, as a light yellow viscous liquid, with a purity of 97%.

[0057] 2.3. Synthesis of silyne surfactant 2#

[0058] Add 138.4 grams (0.2 moles) of ethylene-terminated acetylenic diol (code name 2#B) prepared in Example 2.2, and the rest of the addition and operation are the same as Example 1.3. Obtain silyne surfactant 2#, light yellow viscous liquid, weighing 151.7 grams, yield 99%, purity 96%.

example 3

[0059] The synthesis of example 3 silikyne surfactant 3#

[0060] 3.1. Synthesis of vinyl-terminated acetoacetate (code 3#A)

[0061] Add 438 g (1 mole) of terminal vinyl ether (a=8, b=0), 216 g (1.5 mole) of ethyl levulinate, and the rest of the addition and operation are the same as Example 1.1. 505 g of terminal vinyl ether levulinate was obtained, with a yield of 96%, as a colorless liquid with a purity of 99%.

[0062] 3.2. Synthesis of vinyl-terminated alkyne diol (code 3#B)

[0063] 131.5 grams (0.25 moles) of terminal vinyl ether levulinate (code name 3#A) prepared in 3.1 as an example of the dripping material, and the rest of the feeding and operation are the same as in Example 1.2. 140.2 g of ethylene-terminated acetylenic diol was obtained, with a yield of 86%, as a light yellow viscous liquid, with a purity of 98%.

[0064] 3.3, silyne surfactant 3#

[0065] Add 130.4 g (0.2 moles) of ethylene-terminated acetylenic diol (code 3#B) prepared in Example 3.2, and t...

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Abstract

The invention discloses a disilane surfactant of a structure formula (I), a preparation method thereof and use thereof. By linking alkynol with an organic silicon surfactant through covalent bonds, the prepared disilane surfactant has the excellent defoaming performance, durable foam resisting and prohibiting performance and excellent hydrolysis resistance of an acetylenic glycol surfactant whileretaining the excellent wettability, high adhesive power, high ductility, high air vent permeability and high rain washing resistance of the organic silicon surfactant. The disilane surfactant can beused as a pesticide adjuvant. In the formula, a is an integer between 8 and 600, b is 0 or 1, c is 0 or 1, and n is 1 or 2.

Description

technical field [0001] The invention belongs to the field of agricultural chemicals, and specifically relates to a silyne structure surfactant and its preparation and application. Background technique [0002] It is well known that the use of surfactants can improve the characteristics of pesticides, and nearly half of the pesticide formulations use surfactants. At present, more environmentally friendly water-based formulations are a direction for the development of pesticides today, among which aqueous emulsions, aqueous suspensions, microemulsions, and water-dispersible granules are the main formulations. Silicone surfactants and acetylene glycol surfactants are mainly used in aqueous dosage forms. [0003] Silicone surfactants have good wettability, strong adhesion, excellent ductility, pore permeability and good rain erosion resistance, and have developed rapidly in just a few decades. In addition, silicone surfactants lower surface tension more than conventional surfa...

Claims

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Application Information

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IPC IPC(8): B01F17/54C09K23/54
Inventor 刘冬雪魏峰司乃国张宗俭吴玉春
Owner 中国中化股份有限公司
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