Hydrolysis-resistant twin-tail trisiloxane surfactant containing alkyl and trioxyl

Abstract

The invention discloses a hydrolysis-resistant twin-tail trisiloxane surfactant containing alkyl and trioxyl, which is shown as the formula (1), wherein R1 is hydrogen or methyl; R2 is alkylenes of 1-6 C atoms; a is 0 or 1; R3 is hydrogen, hydrocarbyls of 1-6 C atoms or acetyls; b and c are numbers between 0 and 6; d, e and f are 0 or positive numbers and satisfy the relationship of 3<=d+e+f<=30, wherein d is not less than 3. The hydrolysis-resistant twin-tail trisiloxane surfactant containing alkyl and trioxyl can remarkably reduce the surface tension of the water solution to be close to 21mN.m-1, has excellent spreading capability on the low-energy hydrophobic surface, is hardly hydrolyzed in 60 days in the environment of pH 4.0 and pH 10.0 and is suitable for pesticide adjuvant.

Description

technical field The invention relates to a hydrolysis-resistant two-tailed trisiloxane surfactant containing an alkyl trioxy group. It belongs to the field of fine chemicals, especially the field of pesticide adjuvants. Background technique 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, the organosilicon pesticide additives of Momentive High-tech Materials Group, are outstanding representatives of this kind of products, but they are very sensitive to the pH value of the environment. When pH<5 or pH>9, they hydrolyze quickly. The environment with a value of about 7 is only stable for about 40 days, which makes their application range limited. US2007088091A1 (2007.4.19) and US...

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Problems solved by technology

However, because their molecules contain a tertiary amine group, their aqueous so

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