Ortosilicato di tetraetile 40% Si, silicato di etile 40, Teos, Tes 40

Ethyl silicate-40 is obtained by the reaction of silicon tetrachloride and ethyl alcohol. Ethylsilicate-40 is a complex mixture containing tetraethoxysilane and oligoethoxysiloxanes. The composition of the product corresponds to the formula (RO)3Si[OSi(OR)2]4OSi(OR)3, Ethylsilicate-40 contains (41±1)% SiO2, 10-15% tetraethoxysilane (TEOS), i.e., upon hydrolysis, it gives about 40% conventional SiO2.

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