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Preparation method of phosphate-type trisiloxane surfactant

A technology of surfactants and trisiloxanes, which is applied in botany equipment and methods, biocides, animal repellents, etc., can solve the problems of poor hydrolysis resistance and surface activity, and achieve good hydrolysis resistance and spreading The effect of increasing the area and enhancing the insecticidal effect

Inactive Publication Date: 2017-04-05
SHAANXI YIPINDA PETROCHEM CO LTD
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AI Technical Summary

Problems solved by technology

However, general nonionic trisiloxane surfactants have poor hydrolysis resistance and poor surface activity under acidic or alkaline conditions, which limits their application. Therefore, the design and synthesis of trisiloxanes with novel structures or ionic trisiloxanes Silicone surfactants are of great significance

Method used

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Embodiment 1

[0014] A preparation method of phosphate ester type trisiloxane surfactant, comprising the following steps:

[0015] (1) Preparation of hydroxyl-terminated polyether-modified trisiloxane: 2 Under protection, add 1,1,1,3,5,5,5-heptamethyltrisiloxane and allyl polyoxyethylene ether into a three-necked flask at a molar ratio of 1:1.2, and stir for 10 - After 15 minutes, heat up to 70 ℃ ~ 80 ℃, then add a chloroplatinic acid alcohol solution with a mass fraction of 0.3%, keep it warm for 4-5 hours, and distill under reduced pressure to obtain a hydroxyl-terminated polyether-modified trisiloxane;

[0016] (2) Synthesis of phosphate-type trisiloxane surfactant: Add hydroxyl-terminated polyether-modified trisiloxane into a three-necked flask, stir, heat to 70°C-90°C, and then add hydroxyl-terminated polyether Ether modified trisiloxane quality 0.05% p-toluenesulfonic acid, add H 3 PO 4 Continue temperature control reaction for 4-8 h, wash with benzene after vacuum distillation, a...

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Abstract

The invention discloses a preparation method of a phosphate-type trisiloxane surfactant. The method comprises the following steps: (1) preparation of hydroxyl-terminated polyether modified trisiloxane, in which, in the protection of N2 flowing, 1,1,1,3,5,5,5-heptamethyltrisiloxane, allyl polyoxyethylene ether, and a chloroplatinic acid alcoholic solution with the mass percentage being 0.3% are subjected to a reaction to prepare hydroxyl-terminated polyether modified trisiloxane; and (2) synthesis of the phosphate-type trisiloxane surfactant, in which, the reaction product of hydroxyl-terminated polyether modified trisiloxane, p-toluenesulfonic acid and H3PO4 is washed with benzene, and then benzene is removed to obtain the phosphate-type trisiloxane surfactant. The phosphate-type trisiloxane surfactant prepared in the method is good in hydrolysis resistance and surface performance, can reduce the surface tension of a pesticide diluent, and improve the insecticidal effect.

Description

technical field [0001] The invention belongs to the field of surfactant preparation, and in particular relates to a preparation method of a phosphate ester type trisiloxane surfactant. Background technique [0002] Trisiloxane surfactants have been favored by researchers at home and abroad because of their unique advantages such as ultra-low interfacial tension, super-permeability, super-wettability and good compatibility, as well as good chemical stability and strong resistance to rain erosion. extensive attention. In recent years, there have been many studies on non-ionic trisiloxane surfactants, which are widely used in the fields of pesticide additives, cosmetics and cleaning agents, textiles, coatings, paints, oil extraction and electrolytes. However, general nonionic trisiloxane surfactants have poor hydrolysis resistance and poor surface activity under acidic or alkaline conditions, which limits their application. Therefore, the design and synthesis of trisiloxanes w...

Claims

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Application Information

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IPC IPC(8): C08G65/338C08G65/327C08G65/336A01N25/30
CPCC08G65/338A01N25/30C08G65/327C08G65/336C08G2650/02C08G2650/04
Inventor 李长英
Owner SHAANXI YIPINDA PETROCHEM CO LTD
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