Method for producing methacryloxypropyltrimethoxysilane

Abstract

The invention relates to a method for producing methacryloxypropyltrimethoxysilane, which belongs to the technical field of industry of fine chemicals. The method comprises the following steps: investing gamma-choropropyltrimethoxysilane and sodium methacrylate in a reactor, adding a catalyst and a polymerization inhibitor, stirring and heating for reacting and filtering a reactant, distilling a filtrate to obtain the product; cleaning the filter residue by using saturated common salt brine with PH value to 7-8, filtering, repeating for 2-3 times, and merging a washing lotion for stationary layering, wherein the filter residue is white common salt crystal and can be used for industrial purpose; wherein a lower layer of the washing lotion is saturated common salt brine for next cycle usage; an upper layer of the washing lotion is the methacryloxypropyltrimethoxysilane crude product, and distilling to obtain the product. According to the invention, yield of methacryloxypropyltrimethoxysilane product is high, energy consumption is low, production cost is low, and more importantly, the by-product can be effectively cycled and used, and no environmental pollution is generated.

Description

Technical field [0001] The invention relates to a production method of methacryloxypropyltrimethoxysilane, belonging to the technical field of fine chemicals. Background technique [0002] Methacryloxypropyl trimethoxysilane is a very versatile silane coupling agent product. It is mainly used in industrial fields such as coatings, rubber, plastics, paint, machinery, electronics, etc., to increase adhesion, cross adhesion, Coupling and other functions, and can increase the product's wear resistance, aging resistance and other application properties. This product has a long history of development and is produced by large companies at home and abroad, such as KH-570 from the Chinese Academy of Sciences, Z-6030 from Dow Corning, MEMO from Digosha, KBM-503 from Shin-Etsu, Japan, and A-174 from Momentive There are many patents and reports on the synthesis of methacryloxypropyl trimethoxysilane at home and abroad, such as EP483480B1, EP43753B1, DE-OS4437667, DE-OS44376660, US5103030, E...

AI Technical Summary

Problems solved by technology

However, as people have higher and higher requirements for chemical production, low energy consumption, low pollution, safety and environmental protection are required for chemical production, so there are still some problems to be solved in the synthesis of methacryloxypropyltrimethoxysilane by conventional phase transfer catalyst method : The first is that the product yield is not high, generally only 80%-90%; the second is the washing of slag salt, the method of washing with low-boiling solvents such as methanol is generally used in industry, and solvent loss will occur during filtration and distillation, resulting in production costs The third is that the by-product sodium chloride salt has not been effectively treated