Quality-improved vinyltrimethoxysilane and quality-improving method

Abstract

The invention discloses an improved-quality vinyltrimethoxysilane and a method for improving quality of vinyltrimethoxysilane, relating to the field of production of vinyltrimethoxysilane. The method comprises the following steps: adding alkali metal alkoxide and vinyltrimethoxysilane into a reaction vessel, wherein the vinyltrimethoxysilane is prepared by an addition process, and the mass ratio of the alkali metal alkoxide to the vinyltrimethoxysilane is greater than or equal to 0.0005-100; heating to 60-110 DEG C, keeping the temperature, and stirring for 4-72 hours, wherein the stirring time decreases as the heating temperature increases; and carrying out rectification under ordinary pressure to obtain the vinyltrimethoxysilane finished product. The method is suitable for the vinyltrimethoxysilane prepared by the addition process, can improve the storage stability of the vinyltrimethoxysilane, and is beneficial to controlling the reaction rate of the vinyltrimethoxysilane in the downstream production process. The method is simple and feasible, and does not influence other physicochemical properties and service performance of the vinyltrimethoxysilane.

Description

technical field [0001] The invention relates to the production field of vinyltrimethoxysilane, in particular to a quality-improved vinyltrimethoxysilane and a quality-improving method. Background technique [0002] At present, there are two main methods for synthesizing vinyltrimethoxysilane in industry: [0003] (1) Addition method: Trimethoxyhydrogensilane and acetylene undergo addition reaction under platinum catalysis to synthesize vinyltrimethoxysilane; [0004] (2) Esterification method: Vinyltrichlorosilane and methanol undergo esterification reaction to generate vinyltrimethoxysilane and hydrogen chloride. [0005] There are traces of organic silicon compounds containing active hydrogen groups in the vinyltrimethoxysilane obtained by the addition method. Therefore, during the storage and use of this type of vinyltrimethoxysilane, the packaging container and the delivery pipeline Flaky solids (commonly known as "skinning") will form on the surface that has been in c...

AI Technical Summary

Problems solved by technology

[0005] There are traces of organic silicon compounds containing active hydrogen groups in the vinyltrimethoxysilane obtained by the addition method. Therefore, during the storage and use of this type of vinyltrimethoxysilane, the packaging container and the delivery pipeline Flaky solids (commonly known as "skinning") will form on the surface that has been in contact with the material. This phenomenon will prevent the packaging container from being used again and block the delivery pipeline.

Moreover, during the downstream hydrolysis of this type of vinyltrimethoxysilane to synthesize liquid resin, fine solid particles will be mixed into the resin, which will seriously affect the transparency and purity of the resin.

In addition, the chemical properties of organosilicon compounds containing active hydrogen groups are active, resulting in the reaction rate of vinyltrimethoxysilane being too fast during the hydrolysis process, which is difficult to control