7623-01-0Relevant articles and documents
A methyl ethyl the cyclosiloxane preparation method
-
Paragraph 0056-0058, (2017/05/18)
The invention discloses a preparation method of methyl ethyl cyclosiloxane. The method comprises the following steps of: placing methyldichlorosilae into an autoclave for hydrosilylation with ethylene under the action of platinum catalyst, and then rectifying the reactant to obtain methyl ethyl dichlorosilane; dripping the methyl ethyl dichlorosilane into dilute acid solution for hydrolyzation and obtaining hydrolysate; performing pyrolysis to the hydrolysate under the action of high boiling point solvents and base catalysts, and finally rectifying the pyrolysis product to obtain trimethyl triethyl cyclotrisiloxane and tetramethyl tetraethyl cyclotetrasiloxane. The methyl ethyl cyclosiloxane is prepared by hydrosilylation of the methyldichlorosilae and the ethylene so as to greatly improve the product yield, reduce the production cost and enlarge the reaction device based on the demands to improve the capacity; the solvent is used in the pyrolysis process so as to reduce material crosslinking, improve the pyrolysis speed, reduce the pyrolysis temperature and decrease the usage amounts of the base catalysts; the method has the advantages of high efficiency and low energy consumption, etc.
THE SILICON-OXYGEN DOUBLE-BONDED INTERMEDIATES. A NEW METHOD FOR THE FORMATION OF ORGANOSILANONES
Tomadze, A. V.,Yablokova, N. V.,Yablokov, V. A.,Razuvaev, G. A.
, p. 43 - 50 (2007/10/02)
The kinetics and mechanism of thermal decomposition of R1R2(H)SiOOR3 silylperoxides have been studied.It has been shown that peroxides generated diorganosilanones, R1R2Si=O, with a high yield in the temperature range 130-180 deg C.A mechanism is suggested for the silanone formation.The interaction of silanones with cyclosiloxanes, triethylsilane, α-methylstyrene has been investigated as well as the cyclisation of silanones.
