Method for producing light-color polysulfide silane coupling agent without buffer agent

Abstract

The invention provides a method for producing a light-color polysulfide silane coupling agent by an aqueous phase process without a buffer agent. The method specifically comprises the following steps: (a) synthesis of a sodium polysulfide aqueous solution, namely adding sodium chloride, sodium hydroxide, sulfur and deionized water into a reactor, stirring and heating to 50-70 DEG C, reacting until the solid is completely dissolved, and preserving heat; (b) addition of a catalyst, namely adding a phase transfer catalyst aqueous solution into the sodium polysulfide aqueous solution, and mixing uniformly; (c) synthesis of a crude product, namely in a stirring state, adding (3-chloropropyl)triethoxy-silane into the solution, controlling the reaction temperature at 70-85 DEG C, and preserving heat; (d) phase separation, namely separating an organic phase on the upper layer from an aqueous phase on the lower layer in the solution, and removing solids in the organic phase; and (e) decoloration and purification, namely decoloring the treated organic phase solution and purifying by distillation to obtain the light-color polysulfide silane coupling agent. The polysulfide silane coupling agent prepared by the method has the advantages of safety and reliability in production, no polymerization, light color, few impurities, high content of active ingredients and high yield.

Description

Technical field [0001] The present invention involves a production method of a polysulsexilane coupling agent, which is the synthesis of organic chemicals.What's more specifically is a method that does not use a buffer water phase method to produce light polysulsexilane coupling agents. Background technique [0002] Polyohydride Silicine coupling agent is an important auxiliary agent to produce green environmental protection tires. It is widely used in products that are widely used in sulfur sulfurized rubber systems. Through the intercourse of inorganic filler or fiber and rubber matrix, it can achieve improvement of product performance.It is used in tires, especially to improve the friction, rotation resistance and humidity resistance of the tire.At present, the multi -sulfids sulfids Silicine coupling agent sold on the market are generally dark products, which is not conducive to the use of the soles of the light -colored product industry such as the sulfur rubber system. [0...

AI Technical Summary

Problems solved by technology

The polysulfide silane coupling agents currently on the market are generally dark-colored products, which are not conducive to the use of light-colored product industries such as vulcanized rubber system shoe soles

[0003] The current large-scale industrial production method of polysulfide silane coupling agent generally has two kinds, the first kind is the synthetic method that uses alcohol solvent, hydrogen sulfide, alkali metal alcoholate etc. as raw material for organic solvent process, and this method exists raw material as Inflammable, explosive, toxic and harmful substances, unsafe production, high cost of raw materials, difficult to handle by-products, exhaust emissions and other problems;...