| abstract |
Thus, one or more alkalis selected from the group of potassium hydroxide, magnesium hydroxide, calcium hydroxide, rubidium hydroxide, ammonium hydroxide, tetraalkylammonium hydroxide, tetraalkyl ammonium alkoxides and phosphonium hydroxides under vacuum according to the present invention Based on the amount, a method of producing substantially pure high molecular weight phenylalkylsiloxane from low molecular weight phenylalkylsiloxane is provided by polymerizing low molecular weight phenylalkylsiloxane in the presence of an alkaline aqueous solution containing at least 50 ppm. |