Wenderoth, Lind & Ponack
Process for producing diorganopolysiloxane
 A process is disclosed for producing a diorganopolysiloxane by polymerizing a cyclic siloxane expressed by the following general formula (2) ##STR1## wherein R.sup.3 represents methyl group, ethyl group, or phenyl group, and p is an integer of 3 or 4, by an anion living polymerization using a lithium trialkylsilonolate or an alkyl lithium as a polymerization initiator and then terminating the anion living polymerization with an acid or a chlorosilane derivative, the improvement comprising treating a diorganopolysiloxane which is modified with a silanol at both its terminals and included in the cyclic siloxane as impurities, with an acetylating agent. 
Chisso Corporation
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inventional inventional inventional
Takeru Katsuyoshi Takaharu Shunji
Fuchigami Tsuchiya Nakano Yoshimatsu