A kind of silane coupling agent and its preparation method and application

Abstract

The invention discloses a silane coupling agent and its preparation method and application. The chemical name of the silane coupling agent is vinyl ethoxy ethyl dilactate silane. The preparation method is as follows: the molar ratio is 1:1.1- 1.2 Vinyltrichlorosilane and ethanol were stirred at 100°C-110°C for 2-3 hours to obtain an intermediate; the intermediate was reacted with ethyl lactate at 150°C-160°C for 4-6 hours to obtain a crude product, wherein , the molar ratio of vinyltrichlorosilane to ethyl lactate is 1:2-4; heat the crude product to 90-110°C and vacuumize it to -0.09MPa~-0.095MPa for 2-3 hours at constant temperature and pressure, then decompress Then add magnesium powder to neutralize the crude product to neutrality, and rectify to obtain vinylethoxydilactate ethyl silane. The hydrochloric acid produced in the reaction process of the present invention is adsorbed by ammonia water with a concentration of 10wt%, so as to prevent environmental pollution; Adding the silane coupling agent into the acrylic emulsion can not only improve the performance of the paint film, but also improve the storage stability of the emulsion, and there is no pollution after decomposition.

Description

A kind of silane coupling agent and its preparation method and application technical field The present invention relates to the field of organic chemistry, be specifically related to a kind of silane coupling agent and preparation method and application thereof. Background technique Along with the improvement of people's living standards, the strengthening of health attention, the demand for environmental protection materials is increasing day by day, and the The traditional oil-based paint not only smells great, pollutes the environment, but also produces VOCs after use, which is harmful to human health, especially ethers and aldehydes. Such substances can cause great harm to human health. At this stage, the traditional oil-based coatings cannot meet the current needs, and the water-based coatings Due to its environmental protection and health, the development trend is rapid. At present, the most widely used water-based paint with rising demand is acrylic emulsion ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of instability of acrylic emulsion caused by the addition of silane coupling agent in the prior art, the present invention provides a silane coupling agent to solve the problem of instability of acrylic emulsion

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