| 摘要 |
PURPOSE: Polymerisation of siloxanes catalysed by certain phosphazene bases is provided. CONSTITUTION: A process for polymerising siloxanes using a phosphazene catalyst, is characterised in that a siloxane having silicon-bonded groups R', where R' denotes a hydroxyl group or a hydrocarbonoxy group having 1 to 8 carbon atoms, is mixed with a cyclic or linear siloxane having no silicon-bonded groups R' and with a phosphazene base catalyst and allowed to polymerise so that the siloxane having silicon-bonded groups R' condenses and the cyclic or linear siloxane having no silicon-bonded R' groups polymerises by equilibration.
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