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Hydrolyzation resistant double-tail trisiloxane surfactant

A technology of surfactant and trisiloxane, which is applied in the field of trisiloxane surfactant and two-tailed trisiloxane surfactant, can solve the problems of being difficult to obtain, difficult to industrialize and develop, and achieves the promotion of spreading Effect

Inactive Publication Date: 2008-12-10
HUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, siloxane, one of the raw materials for the synthesis of these two types of hydrolysis-resistant silicone surfactants, is very special, it is difficult to obtain from the market, and it is not easy to carry out industrialization development

Method used

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  • Hydrolyzation resistant double-tail trisiloxane surfactant
  • Hydrolyzation resistant double-tail trisiloxane surfactant
  • Hydrolyzation resistant double-tail trisiloxane surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1.06×10 to the three-neck flask -2 Moles of 3-aminopropyl trisiloxane [compound shown in formula (2), wherein R 1 = H, R 2 =CH 2 , a=1], 0.72×10 -2 Mole methyl polyoxyethylene glycidyl ether [compound shown in formula (3), wherein R 4 =CH 3 , c=8.4, d=e=0] and 44 milliliters of toluene, feed nitrogen to replace the air in the reactor, under nitrogen protection, reflux for 3 hours, distill off the solvent and excess aminoalkyltrisiloxane to obtain the formula (4) shown single tail surfactant (wherein R 1 = H, R 2 =CH 2 , R 4 =CH 3 , a=1, c=1, d=e=0; MS1 for short).

[0020] Add 0.7×10 to the three-neck flask -2 mol of the single-tailed surfactant (MS1) prepared earlier, 0.70×10 -2 mole n-octane bromide 1.40×10 -2 Mole of sodium carbonate and 40 milliliters of toluene, feed nitrogen to replace the air in the reactor, under nitrogen protection, react at 80-110°C for 10 hours, cool down, filter to remove the filter residue, and the filtrate is distilled to ...

Embodiment 2

[0022] Add 1.0×10 to the three-neck flask -2 Moles of 3-aminopropyl trisiloxane [compound shown in formula (2), wherein R 1 = H, R 2 =CH 2 , a=1], 0.70×10 -2 Mole methyl polyoxyethylene glycidyl ether [compound shown in formula (3), wherein R 4 =CH 3 , c=12.9, d=e=0] and 42 milliliters of toluene, feed nitrogen to replace the air in the reactor, under nitrogen protection, reflux for 3 hours, distill off solvent and excess 3-aminopropyl trisiloxane The single-tail surfactant (wherein R) shown in alkane formula (4) 1 = H, R 2 =CH 2 , R 4 =CH 3 , a=1, c=12.9, d=e=0; MS2 for short).

[0023] Add 0.60×10 to the three-neck flask -2 The single tail surfactant (MS2) prepared in front of mole, 0.60×10 -2 mole n-octane bromide 1.20×10 -2 Mole of sodium carbonate and 40 milliliters of toluene, feed nitrogen to replace the air in the reactor, under nitrogen protection, react at 80-110°C for 10 hours, cool down, filter to remove the filter residue, and the filtrate is distille...

Embodiment 3

[0025] In the there-necked flask, add the single tail surfactant (MS1) 0.70×10 prepared by the embodiment -2 mole, n-octyl glycidyl ether 0.70×10 -2mol and 40 milliliters of toluene, feed nitrogen to replace the air in the reactor, under the protection of nitrogen, react at 80~110°C for 10 hours, distill off the solvent to obtain the double tail surfactant shown in formula (1) (wherein R 1 = H, R 2 =CH 2 , R 3 =n-C 8 h 17 , R 4 =CH 3 , a=1, c=8.4, b=1, d=e=0; DS3 for short).

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Abstract

The invention discloses a double-tail tri-siloxane surfactant as shown in the formula (1); wherein, the R<1> is hydrogen or methyl; R<2> is the alkylene with 1-6 carbon atoms; a and b are 0 or 1; R<3> is the alkyl with 1-20 carbon atoms; R<4> is hydrogen, the alkyl with 1-6 carbon atoms, or acetyl; c, d and e are 0 or positive numbers meeting the conditions that c+d+e is not less than 3 and not more than 30 and c is not less than 3. The double-tail tri-siloxane surfactant of the invention has the advantages of remarkably reducing the surface tension of aqueous solution and having stronger hydrolysis resistant performance and spreading performance on low-energy hydrophobic surface, which is suitable for pesticide adjuvant.

Description

technical field [0001] The invention relates to trisiloxane surfactants, in particular to hydrolysis-resistant double-tailed trisiloxane surfactants, and also relates to their specific applications. It belongs to the field of pesticide adjuvants. Background technique [0002] Trisiloxane surfactant is a new type of pesticide adjuvant developed in the middle of the 20th century. It can significantly reduce the surface tension of water to 21mN / m, and has the advantages of good wettability, strong adhesion, excellent spreadability, high pore permeability and good rain erosion resistance. Silwet L-77 and Silwet 408 of Momentive High-tech Materials Group's organic silicon pesticide additives are outstanding representatives of this type of product, but they are very sensitive to the pH of the environment. When pH<5 or pH>9, they hydrolyze quickly. It can only be stable for about 40 days in an environment of about 7, which limits their application range to a certain extent....

Claims

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Application Information

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IPC IPC(8): B01F17/54A01N25/30C09K23/54
Inventor 彭忠利
Owner HUIZHOU UNIV
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