Property description: Colorless transparent liquid, melting point -25 ° C, boiling point 233C, density 1.062 g/mL at 25C, refractive index n20/D 1.468, flash point 99E. Soluble in organic solvents, insoluble in water.
Preparation: Heat and stir metal sodium and toluene in a reactor to 110 ° C to prepare sodium sand, then cool to 40 ° C, add chlorobenzene dropwise to make a black phenyl sodium suspension, and finally add phenyl sodium to orthosilicate methyl for continuous reaction. After the reaction is completed, solid-liquid separation is carried out, and the liquid phase is distilled to obtain phenyl trimethoxysilane with a purity of 99.5% or more
Purpose: Phenyltrimethoxybutane is a single molecule chemical substance that reacts with water to form silanols and methanol. After hydrolysis, reactive silanols are formed, which can condense with other silanol groups (such as silanol groups on the surface of silica fillers) to form siloxane chains.
Siloxane condensation products can form stably on other oxides such as aluminum, cobalt, tin, tin, and nickel, but are relatively stable with oxides of boron, iron, and carbon, and cannot form on the surface of alkali metal oxides and carbonates. The moisture in the air or on the surface of the substrate may be sufficient to ensure hydrolysis, but in some cases, it may also be necessary to add water to increase the degree of hydrolysis.